ProfileChristoph Simon studied physics at the University of Vienna, obtained a master's degree at Ecole Normale Superieure in Paris, and did a PhD with Anton Zeilinger at the University of Vienna. He was a postdoc with Dirk Bouwmeester in Oxford and at UC Santa Barbara. In 2004 he obtained a permanent research position with the French National Research Center (CNRS) in Grenoble. From 2006 to 2009, he spent three years as a senior researcher in Nicolas Gisin's group at the University of Geneva, while on leave from his CNRS position. Since July 2009 he has been a tenured associate professor at the University of Calgary. Dr. Simon has made significant contributions to the fields of quantum optics and quantum information, often in the form of proposals for experiments or experimental research programs. He frequently collaborates closely with experimentalists, which allows him to make proposals that are both realistic and relevant to his field at any given moment. His most significant contributions are in the fields of long-distance quantum communication (entanglement creation, quantum repeaters, entanglement purification, quantum memories) and of trying to bring quantum physics to the macroscopic level (quantum opto-mechanics, quantum amplification).
Research Interests: Quantum physics is simple, mysterious, and extremely successful in explaining physical phenomena. Quantum optics, which studies the interaction of light and matter at the quantum level, has been at the heart of the development of quantum physics since the beginning and is particularly well suited for probing the unique features of quantum physics such as superposition and entanglement. We use quantum optical approaches to study potential applications of these unique quantum phenomena (e.g. a future “quantum internet”), to probe whether they are universal, and to investigate whether they could play a role in biology, especially in neuroscience. Quantum Alberta ThemesOutputs
Title | Category | Date | Authors |
Quantum Repeaters with Photon Pair Sources and Multimode Memories University of Calgary | Publication | 2007-05-01 | C. Simon, H. d. Riedmatten, M. Afzelius, N. Sangouard, H. Zbinden, N. Gisin | Creating Single Time-Bin-Entangled Photon Pairs University of Calgary | Publication | 2005-01-01 | C. Simon, J. Poizat | Possibility of observing energy decoherence due to quantum gravity University of Calgary | Publication | 2004-11-01 | C. Simon, D. Jaksch | Robust Long-Distance Entanglement and a Loophole-Free Bell Test with Ions and Photons University of Calgary | Publication | 2003-09-01 | C. Simon, W. T. Irvine | Natural entanglement in Bose-Einstein condensates University of Calgary | Publication | 2002-11-01 | C. Simon | No-Signaling Condition and Quantum Dynamics University of Calgary | Publication | 2001-10-01 | C. Simon, V. Bužek, N. Gisin | Feasible “Kochen-Specker” Experiment with Single Particles University of Calgary | Publication | 2000-08-01 | C. Simon, M. Żukowski, H. Weinfurter, A. Zeilinger | Temporally multiplexed quantum repeaters with atomic gases University of Calgary | Publication | 2010-07-01 | C. Simon, H. d. Riedmatten, M. Afzelius | Purification of Single-Photon Entanglement University of Calgary | Publication | 2010-05-01 | C. Simon, C. Simon, N. Sangouard, N. Gisin, C. Simon, C. Simon, C. Simon, C. Simon, R. T. Thew, C. Simon, e. al | Diffraction effects on light–atomic-ensemble quantum interface University of Calgary | Publication | 2005-03-01 | C. Simon, P. Petrov, D. Oblak, C. L. Alzar, S. R. Echaniz, E. S. Polzik | Fock-state view of weak-value measurements and implementation with photons and atomic ensembles University of Calgary | Publication | 2011-04-01 | C. Simon, E. S. Polzik | Three-photon energy–time entanglement University of Calgary | Publication | 2012-11-01 | C. Simon, C. Simon, C. Simon, C. Simon, C. Simon, T. Jennewein | Fundamental quantum optics experiments conceivable with satellites - reaching relativistic distances and velocities University of Calgary | Publication | 2012-01-01 | C. Simon, T. Jennewein, C. Simon, C. Simon, B. L. Higgins, C. Simon, C. Simon, R. Laflamme, X. Ma, R. B. Mann, C. Simon, N. C. Menicucci, C. Simon, C. Simon, C. Simon, C. Simon, D. R. Terno | Practical private database queries based on a quantum-key-distribution protocol University of Calgary | Publication | 2011-01-01 | C. Simon, C. Simon, N. Gisin, J. -. Bancal, C. Branciard, C. Simon, H. Zbinden | Quantum memories: A review based on the European integrated project “Qubit Applications” University of Calgary | Publication | 2010-01-01 | C. Simon, M. Afzelius, J. Appel, C. Simon, C. Simon, N. Gisin, C. Y. Hu, C. Simon, S. Kröll, C. Simon, E. S. Polzik, J. Rarity, H. d. Riedmatten, C. Simon, C. Simon, C. Simon, C. Simon, R. Thew, C. Simon, C. Simon | Quantum light and matter University of Calgary | Presentation | 2010-05-05 | C. Simon | Applied quantum optics: from quantum repeaters to precision measurements University of Calgary | Presentation | 2010-05-13 | C. Simon | Towards highly efficient multi-mode quantum memories University of Calgary | Presentation | 2010-06-22 | C. Simon | Towards efficient photon-photon gates University of Calgary | Presentation | 2010-12-17 | C. Simon | Quantum experiments with human eyes as detectors and micro-macro entanglementIt is interesting to think about ways of bringing quantum
phenomena into the realm of everyday experience. One promising
approach is via quantum optics. The human eye responds reliably to of
order one hundred photons. It is possible to create entangled states
of light of that order of magnitude by starting from a single
entangled photon pair, and amplifying one of the two initial photons
through a process known as quantum cloning by stimulated emission.
This is an example of micro-macro entanglement, i.e. entanglement
between a single microscopic quantum system and another system that is
in some sense macroscopic (similar to Schroedinger's famous cat
thought experiment). One can show that such micro-macro entanglement
allows one in principle to violate Bell inequalities, thus allowing
the demonstration of quantum non-locality using human eyes as
detectors. This leads to the question whether the same kind of
measurement also proves that the micro-macro state is entangled. A
careful analysis shows that the Bell inequality violation only proves
the original (micro-micro) entanglement. Unambiguously proving
micro-macro entanglement seems to require measurements with
single-photon resolution (which the human eye does not provide),
raising the question whether quantum-level resolution is a general
requirement for observing quantum effects in macroscopic systems.
References:
[1] P. Sekatski, N. Brunner, C. Branciard, N .Gisin, and C. Simon,
Quantum Experiments with Human Eyes as Detectors based on Cloning via
Stimulated Emission, Phys. Rev. Lett. 103, 113601 (2009).
[2] P. Sekatski, B. Sanguinetti, E. Pomarico, N. Gisin, and C. Simon,
Cloning Entangled Qubits to Scales One Can See, Phys. Rev. A 82,
053814 (2010).
Popular description of some of this research:
http://www.wired.com/wiredscience/2010/06/human-quantum-entanglement-detector/
University of Calgary | Presentation | 2011-03-31 | C. Simon | Extending the quantum domain with quantum optics University of Calgary | Presentation | 2014-06-23 | C. Simon | Einstein and 'spooky action at a distance' University of Calgary | Presentation | 2014-03-14 | C. Simon | Quantum repeatersI will briefly describe recent progress on the development of practical quantum repeater architectures, where the most immediate goal is to outperform the direct transmission of quantum states. I will focus on architectures using solid-state atomic ensembles as quantum memories, which may allow very efficient temporal multiplexing through the implementation of multimode memories. I will also discuss a promising approach based on trapped ions, which builds on the impressive experimental progress achieved with the goal of quantum computation in mind. University of Calgary | Presentation | 2009-08-24 | C. Simon, N. Sangouard, H. R. de, M. Afzelius, N. Gisin, U. M. Staudt, J. Minar, H. Zbinden, B. Zhao, -. A. Chen, J. -. Pan, R. Dubessy | Towards practical quantum repeaters (and quantum experiments with human eye detectors) University of Calgary | Presentation | 2009-09-22 | C. Simon | Quantum memories and quantum information processing with photons and atomic ensembles University of Calgary | Presentation | 2010-06-07 | C. Simon | Some well intentioned career advice University of Calgary | Presentation | 2010-07-12 | C. Simon | Micro-macro entanglement based on cloning by stimulated emission University of Calgary | Presentation | 2010-08-26 | C. Simon | Quantum repeaters University of Calgary | Presentation | 2011-05-19 | C. Simon | Photonic quantum information processing University of Calgary | Presentation | 2011-05-20 | C. Simon | Photonic quantum memory in two-level ensembles based on refractive index modulation: equivalence to gradient echo memory University of Calgary | Presentation | 2012-07-25 | C. Simon, K. Heshami, C. Simon | Micro-macro entanglement University of Calgary | Presentation | 2013-06-20 | C. Simon | Extending the quantum domain with quantum optical systems University of Calgary | Presentation | 2014-06-13 | C. Simon | Quantum mysteries and paradoxes University of Calgary | Presentation | 2013-08-09 | C. Simon | Quantum repeaters, quantum memories, and micro-macro entanglement University of Calgary | Presentation | 2013-06-17 | C. Simon | Impossibility of faithfully storing single photons with the three-pulse photon echo University of Calgary, The University of Calgary | Publication | 2010-06-01 | N. Sangouard, C. Simon, J. Minář, M. Afzelius, T. Chanelière, N. Gisin, J. L. Gouët, H. d. Riedmatten, W. Tittel | Analysis of a quantum memory for photons based on controlled reversible inhomogeneous broadening University of Calgary | Publication | 2007-03-01 | N. Sangouard, C. Simon, M. Afzelius, N. Gisin | Purification of single-photon entanglement with linear optics University of Calgary | Publication | 2008-11-01 | N. Sangouard, C. Simon, T. Coudreau, N. Gisin | Giant optical nonlinearity induced by a single two-level system interacting with a cavity in the Purcell regime University of Calgary | Publication | 2007-05-01 | A. Auffèves-Garnier, C. Simon, J. Gérard, J. Poizat | Precision of single-qubit gates based on Raman transitions University of Calgary | Publication | 2007-03-01 | X. Caillet, C. Simon | Multipartite Entanglement Inequalities via Spin Vector Geometry University of Calgary | Publication | 2005-10-01 | G. A. Durkin, C. Simon | Resilience of multiphoton entanglement under losses University of Calgary | Publication | 2004-12-01 | G. A. Durkin, C. Simon, J. Eisert, D. Bouwmeester | Entanglement detection based on interference and particle counting University of Calgary | Publication | 2003-12-01 | G. Tóth, C. Simon, J. I. Cirac | Towards Quantum Superpositions of a Mirror University of Calgary | Publication | 2003-09-01 | W. Marshall, C. Simon, R. Penrose, D. Bouwmeester | Multiphoton Entanglement Concentration and Quantum Cryptography University of Calgary | Publication | 2002-04-01 | G. A. Durkin, C. Simon, D. Bouwmeester | On the quantification of entanglement in infinite-dimensional quantum systems University of Calgary | Publication | 2002-04-01 | J. Eisert, C. Simon, M. B. Plenio | Optimal photon cloning University of Calgary | Publication | 2000-08-01 | J. Kempe, C. Simon, G. Weihs | Quantum Cryptography with Entangled Photons University of Calgary | Publication | 2000-05-01 | T. Jennewein, C. Simon, G. Weihs, H. Weinfurter, A. Zeilinger | Effective Size of Certain Macroscopic Quantum Superpositions University of Calgary | Publication | 2002-10-01 | W. Dür, C. Simon, J. I. Cirac | Multimode quantum memory based on atomic frequency combs University of Calgary | Publication | 2009-05-01 | M. Afzelius, C. Simon, H. d. Riedmatten, N. Gisin | Creating single collective atomic excitations via spontaneous Raman emission in inhomogeneously broadened systems: Beyond the adiabatic approximation University of Calgary | Publication | 2009-06-01 | C. Ottaviani, C. Simon, H. d. Riedmatten, M. Afzelius, B. Lauritzen, N. Sangouard, N. Gisin | Measuring Small Longitudinal Phase Shifts: Weak Measurements or Standard Interferometry? University of Calgary | Publication | 2010-07-01 | N. Brunner, C. Simon | Quantum repeaters based on atomic ensembles and linear optics University of Calgary | Publication | 2011-03-01 | N. Sangouard, C. Simon, H. d. Riedmatten, N. Gisin | Optomechanical entanglement in the presence of laser phase noise University of Calgary | Publication | 2011-12-01 | R. Ghobadi, C. Simon, C. Simon | Proposal to observe the nonlocality of bohmian trajectories with entangled photons University of Calgary | Publication | 2013-01-01 | B. Braverman, C. Simon | Quantum optomechanics in the bistable regime University of Calgary | Publication | 2011-01-01 | R. Ghobadi, C. Simon, C. Simon | Cloning entangled photons to scales one can see University of Calgary | Publication | 2010-01-01 | P. Sekatski, C. Simon, C. Simon, N. Gisin, C. Simon | Impedance-matched cavity quantum memory University of Calgary | Publication | 2010-01-01 | M. Afzelius, C. Simon | Quantum repeaters with entangled coherent states University of Calgary | Publication | 2010-05-01 | N. Sangouard, C. Simon, N. Gisin, J. Laurat, C. Simon, P. Grangier | Micro-macro entanglement and coarse-grained measurementsWe are studying the demonstration of entanglement in a micro-macro system. The entanglement is
produced via parametric down conversion process between two photons and is being amplified through
a phase-co-variant cloner to entanglement between a photon and a beam of light. We introduce an
analogous system which exploits an entanglement breaking amplifier and produces only classical
correlation between the two parties. We show that it is hard to distinguish the outcomes of the two
systems, considering even a small inaccuracy in photon counting measurements. We model these
inaccuracies as coarse-graining. The result is that for certain types of measurements, small coarse-
graining makes the classical and quantum mechanical correlation indistinguishable. University of Calgary | Presentation | 2011-05-12 | S. Raeisi, C. Simon, C. Simon | Micro-Macro Entanglement and Coarse-grained MeasurementsWe are studying the demonstration of entanglement in a micro-macro system. The entanglement is
produced via parametric down conversion process between two photons and is being amplified through
a phase-co-variant cloner to entanglement between a photon and a beam of light. We introduce an
analogous system which exploits an entanglement breaking amplifier and produces only classical
correlation between the two parties. We show that it is hard to distinguish the outcomes of the two
systems, considering even a small inaccuracy in photon counting measurements. We model these
inaccuracies as coarse-graining. The result is that for certain types of measurements, small coarse-
graining makes the classical and quantum mechanical correlation indistinguishable. University of Calgary | Presentation | 2011-06-16 | S. Raeisi, C. Simon, C. Simon | Why is it hard to see Schrödinger's cat?We are studying the demonstration of entanglement in a micro-macro system. The entanglement is produced via parametric down conversion process between two photons and is being amplified through a phase-covariant cloner to entanglement between a photon and a beam of light. We introduce an analogous system which exploits an entanglement breaking amplifier and produces only classical correlation between the two parties. We show that it is hard to distinguish the outcomes of the two systems considering even a small inaccuracy in photon counting measurements. We model these inaccuracies as coarse-graining. The result is that for certain types of measurements small coarse-graining makes the classical and quantum mechanical correlation indistinguishable. University of Calgary | Presentation | 2011-06-24 | S. Raeisi, C. Simon, C. Simon | Polaritonic quantum memory with two-level systemsGenerating efficient quantum memories is crucial for the future Information processing. One of the well-known methods for describing quantum memories and analyzing the nature of coupling between light and matter is Polariton model. We analyze a light storage protocol based on cavity arrays [1] in terms of two-level polaritons, which is different from the typical EIT polaritons [2]. The cavity array scheme moreover inspires us to propose a quantum memory scheme with atomic ensembles. The scheme [1] is based on two types of cavities, wave-guide and side cavities. The coupled system possesses two eigen-states (polaritons) corresponding to two different group velocities. One can launch the incoming light into one of these polaritons and changes its group velocity by adiabatic modulation of the detuning between side-cavities and waveguide-cavities. In principle, this allows us to reduce the group velocity to zero, while the adiabaticity guarantees that the eigen-states (polaritons) remain separated during the process. Based on the cavity array model, we introduce an ideal and reversible transfer technique for the quantum state between light and two level atoms. The method is based on the control of photon propagation in the medium, in which the group velocity could be manipulated by the detuning and adiabatically reduced to zero. We present a detailed analysis for this model based on polaritonic description. [1] M. F. Yanik, S. Fan, Physical Review Letters, 92, (2004). [2] M. Fleischhauer, M. D. Lukin, Phys. Rev. Lett. 84, 5094. (2000). University of Calgary | Presentation | 2012-06-12 | M. Khazali, C. Simon, H. Kaviani, R. Ghobadi, K. Heshami | Rydberg scattering of frozen spin-waves University of Calgary | Presentation | 2013-06-26 | M. Khazali, C. Simon, B. He, K. Heshami | On the impossibility of faithfully storing single-photons with three-pulse photon echo University of Calgary, The University of Calgary | Publication | 2010-06-01 | N. Sangouard, C. Simon, J. Minar, M. Afzelius, T. Chanelière, N. Gisin, J. L. Le, H. R. de, W. Tittel | Purfication of single-photon entanglement with linear optics University of Calgary | Publication | 2008-11-01 | N. Sangouard, C. Simon, T. Coudreau, N. Gisin | Robust and efficient quantum repeaters with atomic ensembles and linear optics University of Calgary | Publication | 2008-06-01 | N. Sangouard, C. Simon, B. Zhao, Y. A. Chen, H. R. de, J. W. Pan, N. Gisin | Storage and retrieval of time-bin qubits with photon-echo-based quantum memories University of Calgary | Publication | 2007-07-01 | N. Gisin, S. A. Moiseev, C. Simon | Phase-noise measurements in long-fiber interferometers for quantum-repeater applications University of Calgary | Publication | 2008-05-01 | J. Minář, H. d. Riedmatten, C. Simon, H. Zbinden, N. Gisin | Realization of Hardy’s Thought Experiment with Photons University of Calgary | Publication | 2005-07-01 | W. T. Irvine, J. F. Hodelin, C. Simon, D. Bouwmeester | Linear optical implementation of nonlocal product states and their indistinguishability University of Calgary | Publication | 2001-07-01 | A. Carollo, G. M. Palma, C. Simon, A. Zeilinger | Violation of Bell’s Inequality under Strict Einstein Locality Conditions University of Calgary | Publication | 1998-12-01 | G. Weihs, T. Jennewein, C. Simon, H. Weinfurter, A. Zeilinger | Quantum repeaters based on single trapped ions University of Calgary | Publication | 2009-04-01 | N. Sangouard, R. Dubessy, C. Simon | Why the two-pulse photon echo is not a good quantum memory protocol University of Calgary | Publication | 2009-05-01 | J. Ruggiero, J. L. Gouët, C. Simon, T. Chanelière | Coherent frequency-down-conversion interface for quantum repeaters University of Calgary | Publication | 2010-01-01 | N. Curtz, R. Thew, C. Simon, N. Gisin, H. Zbinden | Photon-Photon Gates in Bose-Einstein Condensates University of Calgary | Publication | 2011-07-01 | A. Rispe, B. He, C. Simon | Coarse Graining Makes It Hard to See Micro-Macro Entanglement University of Calgary | Publication | 2011-12-01 | S. Raeisi, P. Sekatski, C. Simon | Photonic quantum memory in two-level ensembles based on modulating the refractive index in time: Equivalence to gradient echo memory University of Calgary | Publication | 2012-07-01 | J. Clark, K. Heshami, C. Simon | Creating and Detecting Micro-Macro Photon-Number Entanglement by Amplifying and Deamplifying a Single-Photon Entangled State University of Calgary | Publication | 2013-04-01 | R. Ghobadi, A. Lvovsky, C. Simon | Photon-photon gate via the interaction between two collective Rydberg excitations University of Calgary | Publication | 2015-03-01 | M. Khazali, K. Heshami, C. Simon | Proposal for inverting the quantum cloning of photons University of Calgary, The University of Calgary | Publication | 2012-01-01 | S. Raeisi, W. Tittel, C. Simon | Heralded amplification for precision measurements with spin ensembles University of Calgary | Publication | 2011-01-01 | N. Brunner, E. S. Polzik, C. Simon | Photonic controlled-phase gate based on Rydberg interactions University of Calgary | Presentation | 2014-08-07 | M. Khazali, K. Heshami, C. Simon | Optical self-phase modulation via nonlinear spin-wave dynamics in a BECLight can be stored in Bose-Einstein condensates for more than one second using quantum memory techniques based on electromagnetically induced transparency [1]. In recent theoretical work [2], Rispe et al. proposed a method for storing photons in Bose-Einstein condensates to create a photon-photon gate. This gate uses the collisions between atoms in order to generate a phase shift that is dependent on the presence or absence of photons. We go beyond the single photon case considered in the previous scheme [2] to the many-photon case in the mean-field treatment and under the Thomas-Fermi approximation, where this scheme leads to strong phase self-modulation. That medium will allow superposition of an arbitrary number of photons to undergoing nonlinear evolution and in particular produce "cat states" [3]. We generate "cat states" [3] from coherent states through the collision-induced interaction.
References: [1] R. Zhang, S. R. Garner, and L.V. Hau, Phys. Rev. Lett. 103, 233602 (2009). [2] A. Rispe, B. He, and C. Simon ,Phys. Rev. Lett. 107, 043601 (2011). [3] B. Yurke, and D. Stoler, Phys. Rev. Lett. 57, 13 (1986). University of Calgary | Presentation | 2012-07-27 | K. Almutairi, C. Trail, C. Simon, B. C. Sanders | Cross-Kerr nonlinearity between continuous-mode coherent states and single photons University of Calgary | Publication | 2011-05-01 | B. He, Q. Lin, C. Simon | Focus on Quantum Memory University of Calgary | Publication | 2015-05-01 | G. Brennen, E. Giacobino, C. Simon | Decomposition of split-step quantum walks for simulating Majorana modes and edge states University of Calgary | Publication | 2017-01-01 | W. Zhang, S. Goyal, C. Simon, B. C. Sanders | A solid-state light–matter interface at the single-photon level University of Calgary | Publication | 2008-12-01 | H. d. Riedmatten, M. Afzelius, M. U. Staudt, C. Simon, N. Gisin | Interference of spontaneous emission of light from two solid-state atomic ensembles University of Calgary | Publication | 2007-11-01 | M. Afzelius, M. U. Staudt, H. d. Riedmatten, C. Simon, S. R. Hastings-Simon, R. Ricken, H. Suche, W. Sohler, N. Gisin | Detection Loophole in Asymmetric Bell Experiments University of Calgary | Publication | 2007-05-01 | N. Brunner, N. Gisin, V. Scarani, C. Simon | Quantum Entanglement of a Large Number of Photons University of Calgary | Publication | 2004-11-01 | H. S. Eisenberg, G. Khoury, G. A. Durkin, C. Simon, D. Bouwmeester | Optomechanical Superpositions via Nested Interferometry University of Calgary | Publication | 2012-07-01 | B. Pepper, R. Ghobadi, E. Jeffrey, C. Simon, D. Bouwmeester | Two-Photon Dynamics in Coherent Rydberg Atomic Ensemble University of Calgary | Publication | 2014-04-01 | B. He, A. V. Sharypov, J. Sheng, C. Simon, M. Xiao | Proposal for the Creation and Optical Detection of Spin Cat States in Bose-Einstein Condensates University of Calgary | Publication | 2014-08-01 | H. W. Lau, Z. Dutton, T. Wang, C. Simon | Fully quantum approach to optomechanical entanglement University of Calgary | Publication | 2014-08-01 | Q. Lin, B. He, R. Ghobadi, C. Simon | Controllable-dipole quantum memory University of Calgary, The University of Calgary | Presentation | 2012-07-24 | K. Heshami, A. Green, Y. Han, C. Simon, E. Saglamyurek, N. Sinclair, W. Tittel, C. Simon | Experimental demonstration of quantum private queries in a real-world environment University of Calgary, The University of Calgary | Presentation | 2012-09-11 | P. Chan, I. Lucio Martinez, X. Mo, C. Simon, W. Tittel | Controllable-dipole quantum memory University of Calgary, The University of Calgary | Presentation | 2012-06-11 | K. Heshami, A. Green, Y. Han, C. Simon, E. Saglamyurek, N. Sinclair, W. Tittel, C. Simon | Micro-macro entanglement in optics University of Calgary | Presentation | 2013-07-24 | A. Lvovsky, R. Ghobadi, Y. Kurochkin, C. Simon | Detuning-change Quantum memory University of Calgary | Presentation | 2012-06-11 | H. Kaviani, M. Khazali, K. Heshami, C. Simon | Detuning-change Quantum memory University of Calgary | Presentation | 2012-07-25 | H. Kaviani, M. Khazali, K. Heshami, C. Simon | Performing private database queries in a real-world environment using a quantum protocol University of Calgary, The University of Calgary | Presentation | 2013-08-05 | P. Chan, I. Lucio Martinez, X. Mo, C. Simon, W. Tittel | Performing private database queries in a real-world environment using a quantum protocol University of Calgary | Publication | 2014-06-01 | P. Chan, I. Lucio-Martinez, X. Mo, C. Simon | Creation and optical detection of spin cat states in Bose-Einstein condensates University of Calgary | Publication | 2014-08-01 | H. W. Lau, Z. Dutton, T. Wang, C. Simon | Precision requirements for observing macroscopic quantum effects University of Calgary | Publication | 2013-12-01 | T. Wang, R. Ghobadi, S. Raeisi, C. Simon | Three-photon energy-time entanglement University of Calgary | Publication | 2013-01-01 | L. K. Shalm, D. R. Hamel, Z. Yan, C. Simon, K. J. Resch, T. Jennewein | Macroscopic superpositions via nested interferometry: finite temperature and decoherence considerations University of Calgary | Publication | 2012-11-01 | B. Pepper, E. Jeffrey, R. Ghobadi, C. Simon, D. Bouwmeester | A solid state light-matter interface at the single photon level University of Calgary | Publication | 2008-12-01 | H. R. de, M. Afzelius, M. U. Staudt, C. Simon, N. Gisin | Zeeman-level lifetimes in Er 3 + : Y 2 SiO 5 University of Calgary | Publication | 2008-08-01 | S. R. Hastings-Simon, B. Lauritzen, M. U. Staudt, J. L. Mechelen, C. Simon, H. d. Riedmatten, M. Afzelius, N. Gisin | Entangling independent photons by time measurement University of Calgary | Publication | 2007-08-01 | M. Halder, A. Beveratos, N. Gisin, V. Scarani, C. Simon, H. Zbinden | Towards Quantum Experiments with Human Eyes as Detectors Based on Cloning via Stimulated Emission University of Calgary | Publication | 2009-09-01 | P. Sekatski, N. Brunner, C. Branciard, N. Gisin, C. Simon | Electric control of collective atomic coherence in an erbium-doped solid University of Calgary | Publication | 2009-11-01 | J. Minář, B. Lauritzen, H. d. Riedmatten, M. Afzelius, C. Simon, N. Gisin | Quantum repeaters based on Rydberg-blockade-coupled atomic ensembles University of Calgary | Publication | 2010-05-01 | Y. Han, B. He, K. Heshami, C. Li, C. Simon | Transverse multimode effects on the performance of photon-photon gates University of Calgary | Publication | 2011-02-01 | B. He, A. MacRae, Y. Han, A. Lvovsky, C. Simon | Precision requirements for spin-echo-based quantum memories University of Calgary | Publication | 2011-03-01 | K. Heshami, N. Sangouard, J. Minár, H. d. Riedmatten, C. Simon | Observation of micro–macro entanglement of light University of Calgary | Publication | 2013-07-01 | A. Lvovsky, R. Ghobadi, A. Chandra, A. Prasad, C. Simon | Prospective applications of optical quantum memories University of Calgary, The University of Calgary | Publication | 2013-10-01 | F. Bussières, N. Sangouard, M. Afzelius, H. d. Riedmatten, C. Simon, W. Tittel | Frequency-multiplexed photon storage and read-out on demand using an atomic frequency comb-based quantum memoryOptical quantum memories require the ability to reversibly map quantum states between photons and atoms [1]. When employed for quantum repeaters [2], quantum memories are key to enabling long-distance quantum communication. Towards this end, quantum memories require recall on demand with high fidelity and efficiency, long storage times, and the possibility to simultaneously store multiple carriers of quantum information. The combination of a quantum state storage protocol based on an atomic frequency comb (AFC) [3] with rare-earth-ion doped crystals cooled to cryogenic temperatures as storage materials [4] has been shown to meet many of these requirements. In particular, it is well suited for storage of temporally multiplexed photons [5,6]. Yet, despite first proof-of-principle demonstrations [7], recalling quantum information at a desired time (i.e. read-out on demand) with broadband, single-photon-level pulses remains an outstanding challenge.
We will present the first experimental demonstration of frequency-multiplexed storage of attenuated laser pulses followed by read-out on demand in the frequency domain. Our work is based on the AFC protocol and employs a Tm-doped LiNbO3 waveguide [8,9]. We will argue that, in view of a quantum repeater, our approach is equivalent to temporal multiplexing and read-out on demand in the temporal domain. This overcomes one further obstacle to building quantum repeaters using rare-earth-ion doped crystals as memory devices.
[1] A. I. Lvovsky, B. C. Sanders and W. Tittel. “Optical Quantum Memory”, Nature Photonics 3, 2009, 706.
[2] N. Sangouard et al. “Quantum repeaters based on atomic ensembles and linear optics”, Rev. Mod. Phys. 83, 2011, 33.
[3] M. Afzelius et al. “Multimode quantum memory based on atomic frequency combs”, Phys. Rev. A 79, 2009, 052329.
[4] W. Tittel et al. “Photon-echo quantum memory in solid state systems”, Las. Phot. Rev. 4 (2), 2010, 244.
[5] I. Usmani et al. “Mapping multiple photonic qubits into and out of one solid-state atomic ensemble”, Nature Commun. 1, 2010, 12.
[6] M. Bonarota, J.-L. Le Gouet, and T. Chanelière. “Highly multimode storage in a crystal”, New J. Phys. 13, 2011, 013013.
[7] M. Afzelius et al. “Demonstration of Atomic Frequency Comb Memory for Light with Spin- Wave Storage”, Phys. Rev. Lett. 104, 2010, 040503.
[8] E. Saglamyurek et al. “Broadband waveguide quantum memory for entangled photons”, Nature 469, 2011, 512.
[9] N. Sinclair et al. “Spectroscopic investigations of a Ti:Tm:LiNbO3 waveguide for photon-echo quantum memory”, J. Lumin. 130, 2010, 1586. University of Calgary, The University of Calgary | Presentation | 2012-08-27 | N. Sinclair, E. Saglamyurek, H. Mallahzadeh, J. Slater, C. Simon, D. Oblak, M. George, R. Ricken, C. Simon, W. Tittel | Precision requirements for spin‐echo based quantum memories University of Calgary | Presentation | 2011-06-07 | K. Heshami, N. Sangouard, J. Minar, H. R. de, C. Simon | A frequency multi-mode Tm:LiNbO3 quantum memoryOptical quantum memories require the ability to reversibly map quantum information between photons and atoms [1]. When employed for quantum repeaters, quantum memories are the key to enabling long-distance quantum communication [2]. Quantum memories require recall with high fidelity and efficiency, long storage times, large bandwidth capabilities, and the possibility to store multiple modes for multiplexing\\r\\n[3]. Attractive material candidates for quantum memories, those of rare-earth-ion doped crystals, may serve to simultaneously fulfill all aforementioned requirements [4]. In this presentation, we show how a Tm:LiNbO3 crystal [5,6] cooled to cryogenic temperatures may serve as an efficient frequency-multiplexed quantum memory. Contrasting previous works that have focused on time-multiplexing [7, 8], we present measurements showing how the wide-band absorption line and large atomic sublevel splitting in Tm:LiNbO3 can be exploited for frequency multiplexing in a quantum repeater.\\r\\n\\r\\n[1] A. I. Lvovsky et. al., Nature Photon. 3, 706(2009).\\r\\n[2] H.-J. Briegel et al., Phys. Rev. Lett. 81, 5932 (1998).\\r\\n[3] N. Sangouard et al., Rev. Mod. Phys. 83, 33 (2011).\\r\\n[4] W. Tittel et al., Laser Photon. Rev. 4, 244 (2010).\\r\\n[5] E. Saglamyurek et al., Nature (London) 469, 512 (2011).\\r\\n[6] N. Sinclair et al., J. Lumin. 130, 1586 (2010).\\r\\n[7] I. Usmani et al., Nature Commun. 1, 12 (2010).\\r\\n[8] M Bonarota et. al., New J. Phys. 13, 013013 (2011).\\r\\n University of Calgary, The University of Calgary | Presentation | 2012-06-14 | N. Sinclair, E. Saglamyurek, H. Mallahzadeh, J. Slater, C. Simon, D. Oblak, M. George, R. Ricken, W. Sohler, W. Tittel | A frequency multi-mode Tm:LiNbO3 quantum memoryOptical quantum memories require the ability to reversibly map quantum information
between photons and atoms [1]. When employed for quantum repeaters, quantum
memories are the key to enabling long-distance quantum communication [2]. Quantum
memories require recall with high fidelity and efficiency, long storage times, large
bandwidth capabilities, and the possibility to store multiple modes for multiplexing [3].
Attractive material candidates for quantum memories, those of rare-earth-ion doped
crystals, may serve to simultaneously fulfill all aforementioned requirements [4]. In this
presentation, we show how a Tm:LiNbO3 crystal [5, 6] cooled to cryogenic temperatures
may serve as an efficient frequency-multiplexed quantum memory. Contrasting previous
works that have focused on time-multiplexing [7, 8], we present measurements showing
how the wide-band absorption line and large atomic sublevel splitting in Tm:LiNbO3 can
be exploited for frequency multiplexing in a quantum repeater.
[1] A. I. Lvovsky et. al., Nature Photon. 3, 706 (2009).
[2] H.-J. Briegel et al., Phys. Rev. Lett. 81, 5932 (1998).
[3] N. Sangouard et al., Rev. Mod. Phys. 83, 33 (2011).
[4] W. Tittel et al., Laser Photon. Rev. 4, 244 (2010).
[5] E. Saglamyurek et al., Nature (London) 469, 512 (2011).
[6] N. Sinclair et al., J. Lumin. 130, 1586 (2010).
[7] I. Usmani et al., Nature Commun. 1, 12 (2010).
[8] M Bonarota et. al., New J. Phys. 13, 013013 (2011). University of Calgary, The University of Calgary | Presentation | 2012-07-25 | N. Sinclair, E. Saglamyurek, H. Mallahzadeh, J. Slater, C. Simon, D. Oblak, M. George, R. Ricken, W. Sohler, W. Tittel | Making a large entangled state from a small one University of Calgary | Presentation | 2013-06-21 | A. Lvovsky, A. Prasad, R. Ghobadi, A. Chandra, C. Simon, Y. Kurochkin | Zeeman level lifetimes in Er 3+: Y2SiO5 University of Calgary | Publication | 2008-08-01 | S. R. Hastings-Simon, B. Lauritzen, M. U. Staudt, J. L. van, C. Simon, H. R. de, M. Afzelius, N. Gisin | Practical quantum repeaters with parametric down-conversion sources University of Calgary | Publication | 2016-03-01 | H. Krovi, S. Guha, Z. Dutton, J. A. Slater, C. Simon, W. Tittel | Testing a Bell inequality in multipair scenarios University of Calgary | Publication | 2008-12-01 | J. Bancal, C. Branciard, N. Brunner, N. Gisin, S. Popescu, C. Simon | Telecommunication-Wavelength Solid-State Memory at the Single Photon Level University of Calgary | Publication | 2010-02-01 | B. Lauritzen, J. Minář, H. d. Riedmatten, M. Afzelius, N. Sangouard, C. Simon, N. Gisin | Spectroscopic investigations of a waveguide for photon-echo quantum memory University of Calgary, The University of Calgary | Publication | 2010-09-01 | N. Sinclair, E. Saglamyurek, M. George, R. Ricken, C. La Mela, C. Simon, W. Tittel | Demonstration of Atomic Frequency Comb Memory for Light with Spin-Wave Storage University of Calgary | Publication | 2010-01-01 | M. Afzelius, I. Usmani, A. Amari, B. Lauritzen, A. Walther, C. Simon, N. Sangouard, J. Minář, H. d. Riedmatten, N. Gisin, e. al | Quantum storage and retrieval of light by sweeping the atomic frequency University of Calgary | Publication | 2013-08-01 | H. Kaviani, M. Khazali, R. Ghobadi, E. Zahedinejad, K. Heshami, C. Simon | Optomechanical Micro-Macro Entanglement University of Calgary | Publication | 2014-02-01 | R. Ghobadi, S. Kumar, B. Pepper, D. Bouwmeester, A. Lvovsky, C. Simon | Quantum memory based on controllable transition dipole momentTo build quantum memory for light with atomic ensembles one need to map single photons into atomic excitations and freeze them until releasing them back to photons on demand. Here we present an idea for realizing this storage-recall procedure by directly turning transition dipole moment on and off in a two-level system. An analytical treatment of the problem is performed and the physical requirements on the proposed scheme are discussed. Employing a magneto-dependent transition dipole moment in Tm3+: YAG crystal, we show a good instructive quantum memory using this simple idea. University of Calgary, The University of Calgary | Presentation | 2010-09-11 | Y. Han, K. Heshami, A. Rispe, E. Saglamyurek, N. Sinclair, C. Simon, W. Tittel, C. Simon | Deterministic conditional phase gate with Rydberg atomsOne of the most promising ways to implement deterministic quantum conditional gate between individual photons is to use the interaction between the large dipole moments of Rydberg polaritons. The multimode character of pulses imposes constraints on implementation of high fidelity quantum gates. To overcome this problem, we have shown that parallel orientation of the dipoles results in optimum fidelity. Additionally, we also have obtained the analytical form for both the induced phase and the fidelity between polaritons for the case that the length of the interaction region is much greater than the size of the polariton wave packets. We also present the advantages of this proposal over previous approaches.
University of Calgary | Presentation | 2011-06-16 | H. Kaviani, B. He, A. MacRae, W. Jiang, A. Lvovsky, C. Simon | Waveguide quantum memory for fast quantum communication - II University of Calgary, The University of Calgary | Presentation | 2010-07-13 | E. Saglamyurek, N. Sinclair, C. La Mela, M. George, R. Ricken, C. Simon, W. Tittel | Waveguide quantum memory for fast quantum communication - I University of Calgary, The University of Calgary | Presentation | 2010-07-13 | E. Saglamyurek, N. Sinclair, C. La Mela, M. George, R. Ricken, C. Simon, W. Tittel | Quantum repeaters using frequency-multiplexed quantum memories University of Calgary, The University of Calgary | Presentation | 2012-08-02 | N. Sinclair, E. Saglamyurek, H. Mallahzadeh, J. Slater, J. Jin, C. Simon, D. Oblak, M. George, R. Ricken, C. Simon, W. Tittel | Long range quantum key distribution using frequency multiplexing in broadband solid state memories The University of Calgary, University of Calgary | Presentation | 2014-06-10 | H. Krovi, Z. Dutton, S. Guha, C. Fuchs, W. Tittel, C. Simon, J. Slater, K. Heshami, M. Hedges, S. G. Kanter, -. P. Huang, W. C. Thiel | Exact analysis of a practical quantum repeater architecture with noisy elements University of Calgary, The University of Calgary | Publication | 2014-10-01 | S. Guha, H. Krovi, C. A. Fuchs, Z. Dutton, J. A. Slater, C. Simon, W. Tittel | Entanglement over global distances via quantum repeaters with satellite links University of Calgary | Publication | 2014-10-01 | K. Boone, J. P. Bourgoin, E. Meyer-Scott, K. Heshami, T. Jennewein, C. Simon | Solid state quantum memory for photons at telecommunication wavelengths University of Calgary | Publication | 2010-02-01 | B. Lauritzen, J. Minar, H. R. de, M. Afzelius, N. Sangouard, C. Simon, N. Gisin | Testing a Bell inequality in multi-pair scenarios University of Calgary | Publication | 2008-12-01 | J. D. Bancal, C. Branciard, N. Brunner, N. Gisin, S. Popescu, C. Simon | Nonclassical States of Light and Mechanics (Chapter 3) University of Calgary | Publication | 2014-07-01 | K. Hammerer, C. Genes, D. Vitali, P. Tombesi, G. Milburn, C. Simon, D. Bouwmeester | Raman quantum memory based on an ensemble of nitrogen-vacancy centers coupled to a microcavity University of Calgary | Publication | 2014-04-01 | K. Heshami, C. M. Santori, B. Khanaliloo, C. Healey, V. M. Acosta, P. E. Barclay, C. Simon | Coherence investigations of Erbium doped in wave-guide structures for a quantum memory University of Calgary, The University of Calgary | Presentation | 2007-03-07 | U. M. Staudt, R. S. Hastings-Simon, B. Lauritzen, M. Afzelius, H. R. de, N. Sangouard, C. Simon, W. Tittel, N. Gisin | Three level systems for quantum memories in Erbium doped materials University of Calgary, The University of Calgary | Presentation | 2007-03-07 | R. S. Hastings-Simon, U. M. Staudt, B. Lauritzen, M. Afzelius, H. R. de, N. Sangouard, C. Simon, W. Tittel, N. Gisin | Raman quantum memory based on an ensemble of nitrogen-vacancy centers coupled to a microcavity University of Calgary | Publication | 2014-06-01 | K. Heshami, C. M. Santori, B. Khanaliloo, C. H. C, V. M. Acosta, P. E. Barclay, C. Simon | Raman optical quantum memory in NV ensembles coupled to a cavity University of Calgary | Publication | 2013-08-01 | K. Heshami, C. Healey, B. Khanaliloo, V. Acosta, C. M. Santori, P. E. Barclay, C. Simon | Raman quantum memory based on an ensemble of nitrogen-vacancy centers coupled to amicrocavity University of Calgary | Publication | 2014-02-01 | K. Heshami, C. M. Santori, B. Khanaliloo, C. Healey, V. M. Acosta, P. E. Barclay, C. Simon | Fidelity of an Optical Memory Based on Stimulated Photon Echoes University of Calgary, The University of Calgary | Publication | 2007-03-01 | M. U. Staudt, S. R. Hastings-Simon, M. Nilsson, M. Afzelius, V. Scarani, R. Ricken, H. Suche, C. Simon, W. Tittel, N. Gisin | Controllable-dipole quantum memory University of Calgary, The University of Calgary | Publication | 2012-07-01 | K. Heshami, A. Green, Y. Han, A. Rispe, E. Saglamyurek, N. Sinclair, W. Tittel, C. Simon | Controllable-dipole quantum memory University of Calgary, The University of Calgary | Presentation | 2011-06-07 | A. Green, Y. Han, K. Heshami, A. Rispe, E. Saglamyurek, N. Sinclair, W. Tittel, C. Simon | Controlled-dipole quantum memory University of Calgary, The University of Calgary | Publication | 2012-07-01 | A. Green, Y. Han, K. Heshami, A. Rispe, E. Saglamyurek, N. Sinclair, W. Tittel, C. Simon | Controllable-dipole quantum memory University of Calgary, The University of Calgary | Publication | 2012-07-01 | K. Heshami, A. Green, Y. Han, A. Rispe, E. Saglamyurek, N. Sinclair, W. Tittel, C. Simon | Spectral Multiplexing for Scalable Quantum Photonics using an Atomic Frequency Comb Quantum Memory and Feed-Forward Control University of Calgary | Publication | 2014-07-01 | N. Sinclair, E. Saglamyurek, H. Mallahzadeh, J. A. Slater, M. George, R. Ricken, M. P. Hedges, D. Oblak, C. Simon, W. Sohler, e. al | Broadband waveguide quantum memory for entangled photons University of Calgary, The University of Calgary | Publication | 2011-01-01 | E. Saglamyurek, N. Sinclair, J. Jin, J. Slater, D. Oblak, F. Bussières, M. George, R. Ricken, C. Simon, W. Tittel | Broadband waveguide quantum memory for entangled photons University of Calgary, The University of Calgary | Presentation | 2011-01-07 | E. Saglamyurek, N. Sinclair, J. Jin, J. Slater, D. Oblak, F. Bussières, M. George, R. Ricken, C. Simon, W. Tittel | Broadband Waveguide Quantum Memory for Entangled Photons University of Calgary, The University of Calgary | Presentation | 2011-05-20 | E. Saglamyurek, N. Sinclair, J. Jin, J. Slater, D. Oblak, F. Bussières, M. George, R. Ricken, C. Simon, W. Tittel | Broadband waveguide quantum memory for entangled photons University of Calgary, The University of Calgary | Presentation | 2011-06-15 | E. Saglamyurek, N. Sinclair, J. Jin, J. Slater, D. Oblak, F. Bussières, M. George, R. Ricken, C. Simon, W. Tittel | Broadband waveguide quantum memory for entangled photons University of Calgary, The University of Calgary | Presentation | 2011-06-24 | E. Saglamyurek, N. Sinclair, J. Jin, J. Slater, D. Oblak, F. Bussières, M. George, R. Ricken, C. Simon, W. Tittel | Broadband waveguide quantum memory for entangled photonsReversible mapping of quantum states, particularly entangled states, between light and matter is important for advanced applications of quantum information science. This mapping, i.e. operation of a quantum memory [1], is imperative for realizing quantum repeaters [2] and quantum networks [3]. Here we report the reversible transfer of photon–photon entanglement into entanglement between a photon and a collective atomic excitation in a solid-state device [4] (see also [5]). Specifically, we generate time-bin enangled pairs of photons [6] at the low-loss 795 nm (in free-space) and 1532 nm (in fibre) wavelengths. The 795 nm photons are sent into a thulium-doped lithium niobate waveguide cooled to 3K, absorbed by the Tm ions, and retrieved after 7 ns by means of a photon-echo quantum memory protocol employing an atomic frequency comb [7]. The acceptance bandwidth of the memory has been expanded to 5 GHz, more than one order of magnitude larger than the previous state-of-the-art [8], to match the spectral width of the filtered 795 nm photons. The entanglement-preserving nature of our storage device is assessed through quantum state tomography before and after storage. Within statistical error, we find a perfect mapping process. Furthermore, by violating the CHSH inequality [9], we directly verify the nonlocal nature of the generated and stored entangled photons.
[1] A. Lvovsky, B. C. Sanders, and W. Tittel, Optical quantum memory, Nature Photonics 3, 706-71 (2009).
[2] N. Sangouard et al., Quantum repeaters based on atomic ensembles and linear optics, Rev. Mod. Phys. 83, 33-80 (2011).
[3] H. J. Kimble, The quantum internet, Nature 453, 1023-1030 (2008).
[4] E. Saglamyurek et al., Broadband waveguide quantum memory for entangled photons, Nature 469, 512-515 (2011).
[5] C. Clausen et al., Quantum storage of photonic entanglement in a crystal, Nature 469, 508-511 (2011).
[6] I. Marcikic et al., Distribution of time-bin entangled qubits over 50 km of optical fiber, Phys. Rev. Lett. 93, 180502 (2004).
[7] M. Afzelius et al., Multimode quantum memory based on atomic frequency combs, Phys. Rev. A 79, 052329 (2009).
[8] I. Usmani et al., Mapping multiple photonic qubits into and out of one solid-state atomic ensemble, Nat. Comm. 1 (12), 1-7 (2010).
[9] J. F. Clauser et al., Proposed experiment to test local hidden-variable theories, Phys. Rev. Lett. 23, 880-884 (1969). University of Calgary, The University of Calgary | Presentation | 2011-08-10 | E. Saglamyurek, N. Sinclair, J. Jin, J. Slater, D. Oblak, F. Bussières, M. George, R. Ricken, C. Simon, W. Tittel | Broadband waveguide quantum memory for entangled photonsQuantum information processing and communication relies on encoding information into quantum states of physical systems such as photons [1]. Actualizing a quantum interface [2] between light and matter is imperative for construction of a quantum repeater [3], which requires a faithful mapping of quantum entanglement [1] between light and matter. In this work we report the reversible transfer of photon-photon entanglement into entanglement between a photon and a collective atomic excitation in a solid-state thulium-doped lithium niobate waveguide [4] (this transfer was simultaneously done in [5]). References: [1] J.-W. Pan et al. arXiv:0805.2853, 2008. [2] A. I. Lvovsky, B. C. Sanders, & W. Tittel. Nat Photon, 3 (12): 706-714, 2009. [3] N. Sangouard et al. arXiv:0906.2699, 2009. [4] E. Saglamyurek et al. Nature, 469 (7331): 512-515, 2011. [5] C. Clausen et al. Nature, 469 (7331): 508-511, 2011. University of Calgary, The University of Calgary | Presentation | 2011-08-25 | E. Saglamyurek, N. Sinclair, J. Jin, J. Slater, D. Oblak, F. Bussières, M. George, R. Ricken, C. Simon, W. Tittel | Quantum memory for quantum repeater University of Calgary, The University of Calgary | Presentation | 2011-09-18 | E. Saglamyurek, N. Sinclair, J. Jin, J. Slater, D. Oblak, F. Bussières, M. George, R. Ricken, C. Simon, W. Tittel | Frequency-multiplexed photon storage and read-out on demand using an atomic frequency comb-based quantum memory University of Calgary, The University of Calgary | Presentation | 2012-09-11 | N. Sinclair, E. Saglamyurek, H. Mallahzadeh, J. Slater, J. Jin, D. Oblak, M. George, R. Ricken, C. Simon, W. Tittel | Experiments with waveguide quantum memory for light University of Calgary, The University of Calgary | Presentation | 2012-07-23 | E. Saglamyurek, N. Sinclair, J. Jin, J. Slater, D. Oblak, F. Bussières, M. George, R. Ricken, C. Simon, W. Tittel | Solid-state photon-echo quantum memory for quantum repeaters University of Calgary, The University of Calgary | Presentation | 2013-02-06 | E. Saglamyurek, N. Sinclair, J. Jin, J. Slater, D. Oblak, F. Bussières, M. George, R. Ricken, C. Simon, W. Tittel | Frequency multiplexed quantum memories with read-out on demand for quantum repeaters University of Calgary, The University of Calgary | Presentation | 2013-07-01 | N. Sinclair, E. Saglamyurek, H. Mallahzadeh, J. Slater, M. Hedges, M. George, R. Ricken, D. Oblak, C. Simon, W. Tittel | Frequency-multiplexed quantum memories with read-out on demand for quantum repeaters University of Calgary, The University of Calgary | Presentation | 2013-07-15 | N. Sinclair, E. Saglamyurek, H. Mallahzadeh, J. Slater, M. Hedges, M. George, R. Ricken, D. Oblak, C. Simon, W. Tittel | Quantum memories with read-out on demand for quantum repeaters University of Calgary, The University of Calgary | Presentation | 2013-09-16 | N. Sinclair, E. Saglamyurek, H. Mallahzadeh, J. Slater, M. George, R. Ricken, M. Hedges, D. Oblak, C. Simon, C. Simon, W. Tittel | Quantum memory for long-distance quantum communication based on spectral multiplexing
University of Calgary, The University of Calgary | Presentation | 2014-03-04 | N. Sinclair, E. Saglamyurek, H. Mallahzadeh, J. Slater, M. George, R. Ricken, M. Hedges, D. Oblak, C. Simon, W. Tittel | Spectrally multiplexed solid-state memories with feed-forward control for quantum repeatersWe present experimental work that demonstrates frequency-multiplexed quantum state storage in solid-state quantum memories with readout on demand. University of Calgary, The University of Calgary | Presentation | 2014-06-10 | N. Sinclair, E. Saglamyurek, H. Mallahzadeh, J. Slater, M. George, R. Ricken, M. Hedges, D. Oblak, C. Simon, C. Simon, W. Tittel | Long distance quantum communications using quantum memories having on-demand recall in the frequency domain University of Calgary, The University of Calgary | Presentation | 2013-08-06 | N. Sinclair, E. Saglamyurek, H. Mallahzadeh, J. Slater, M. George, R. Ricken, M. Hedges, D. Oblak, W. Sohler, C. Simon, W. Tittel | Quantum memory and entanglement storage in rare-earth ion doped crystals University of Calgary, The University of Calgary | Presentation | 2011-09-04 | D. Oblak, E. Saglamyurek, N. Sinclair, J. Jin, J. Slater, M. Lamont, F. Bussières, M. George, R. Ricken, C. Simon, W. Tittel | Quantum memory and entanglementReversibly mapping entanglement between photons and atoms, which serve as quantum memory, and projecting independent (pure) photonic quantum states after recall from such a memory onto entangled states are key to quantum repeaters and, more generally, quantum networks [1]. In this talk we present the reversible mapping of quantum information encoded into one of two time-bin entangled photons using a photon-echo quantum memory protocol [2] (for closely related work see [3]). Our results show, within experimental uncertainty, that the encoded quantum information, i.e. the property of the stored photon being one member of an entangled pair, can be retrieved without degradation. Furthermore, we will demonstrate two-photon interference and the projection onto an entangled state using attenuated pulses of light (featuring an average of less than one photon per pulse) that have, or have not, been reversibly mapped to separate quantum memories. As the interference visibility is close to the theoretical maximum, regardless of whether none, one, or both pulses have previously been stored, we conclude that our solid-state quantum memories preserve not only encoded quantum information, but the entire photonic wave function during storage. Both investigations take advantage of thulium-doped lithium niobate waveguide quantum memories as storage materials, and employ a photon-echo type quantum memory approach based on atomic frequency combs [4]. Our findings complete previously missing steps towards advanced applications of quantum information processing, and bring us closer to building quantum repeaters, networks, and linear optics quantum computers.
[1] N. Sangouard et al. “Quantum repeaters based on atomic ensembles and linear optics”, Rev. Mod. Phys. 83, 2011, 33.
[2] E. Saglamyurek et al. “Broadband waveguide quantum memory for entangled photons”, Nature 469, 2011, 512.
[3] C. Clausen et al. “Quantum storage of photonic entanglement in a crystal”, Nature 459, 2011, 508.
[4] M. Afzelius et al. “Multimode quantum memory based on atomic frequency combs”, Phys. Rev. A 79, 2009, 052329. University of Calgary, The University of Calgary | Presentation | 2012-08-27 | E. Saglamyurek, N. Sinclair, H. Mallahzadeh, J. Jin, J. Slater, D. Oblak, F. Bussières, M. George, R. Ricken, C. Simon, W. Tittel | Towards quantum repeaters based on frequency multiplexing in RE lon doped solids University of Calgary, The University of Calgary | Presentation | 2013-07-17 | J. Slater, N. Sinclair, E. Saglamyurek, H. Mallahzadeh, J. Jin, M. George, R. Ricken, M. Hedges, D. Oblak, C. Simon, W. Tittel | Quantum repeaters with broadband waveguide quantum memory University of Calgary, The University of Calgary | Presentation | 2013-09-26 | J. Slater, E. Saglamyurek, N. Sinclair, J. Jin, H. Mallahzadeh, L. P. Grimau, F. Bussières, M. Hedges, D. Oblak, C. Simon, M. George, R. Ricken, C. Simon, W. Tittel | Quantum repeaters with broadband waveguide quantum memory University of Calgary, The University of Calgary | Presentation | 2013-09-20 | J. Slater, E. Saglamyurek, N. Sinclair, J. Jin, H. Mallahzadeh, L. P. Grimau, F. Bussières, M. Hedges, D. Oblak, C. Simon, M. George, R. Ricken, C. Simon, W. Tittel | Quantum repeaters with broadband waveguide quantum memory University of Calgary, The University of Calgary | Presentation | 2013-11-25 | J. Slater, E. Saglamyurek, N. Sinclair, J. Jin, H. Mallahzadeh, L. P. Grimau, L. Giner, F. Bussières, M. Hedges, D. Oblak, C. Simon, M. George, R. Ricken, C. Simon, W. Tittel | Quantum Information devices in rate-Earth ion doped waveguide materials University of Calgary, The University of Calgary | Presentation | 2015-01-07 | D. Oblak, N. Sinclair, E. Saglamyurek, K. Heshami, J. Jin, H. Mallahzadeh, T. Lutz, L. Veissier, J. Slater, M. Hedges, M. George, R. Ricken, B. V. Verma, F. Marsili, S. M. Shaw, W. C. Thiel, L. R. Cone, C. Simon, W. S. Nam, W. Tittel |
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