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Quantum Information Science
Quantum Memory
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| Title | Category | Date | Authors |
| 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 | | 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 | | 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 | | 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 | | Tm:LiNbO3 waveguides: a novel material candidate for quantum memoriesQuantum memories, a key resource for many quantum communication and computing applications, require the possibility to reversibly transfer quantum information between photos and atoms. For instance, quantum memories are the main ingredient of quantum repeaters, essential components in long distance quantum cryptography. High recall efficiency, long storage times, and the possibility to store short pulses with high fidelity are the most important properties to be achieved in these devices. Determining the best approaches for implementation of quantum memories, as well as finding appropriate storage materials, is a field of extensive current research. In this presentation, we introduce our approach to quantum memories, which is based on controlled reversible inhomogeneous broadening (CRIB) of a narrow absorption line [1], and we present first spectroscopic investigations of a novel and promising material candidate: Thulium doped Lithium Niobate waveguides. We discuss our findings in view of the requirements for quantum memories. 1. M. Nilson, and S. Kroll, Opt. Commun. Vol. 247, No. 4-6 (2005). 2. A. L. Alexander, J. J. Longdell, M. J. Sellars, and N. B. Manson, Phys. Rev. Lett. 96, 043602 (2006). 3. B. Kraus, W. Tittel, N. Gisin, M. Nilsson, S. Kroll, and J. I. Cirac, Phys. Rev. A. 73, 020302(R) (2006). University of Calgary, The University of Calgary | Presentation | 2009-06-09 | N. Sinclair, E. Saglamyurek, C. La Mela, W. Tittel | | Tm:LiNbO3 waveguides: a novel material candidate for quantum memories University of Calgary, The University of Calgary | Presentation | 2009-06-26 | N. Sinclair, E. Saglamyurek, C. La Mela, 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\\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 | | 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 | | Towards repeater-based quantum communication University of Calgary, The University of Calgary | Presentation | 2013-01-30 | N. Sinclair, 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 | | 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 | | Frequency multiplexed quantum memories for quantum repeaters University of Calgary, The University of Calgary | Presentation | 2013-06-26 | N. Sinclair, E. Saglamyurek, H. Mallahzadeh, J. Slater, M. Hedges, D. Oblak, W. Tittel | | Towards spectrally multiplexed quantum repeaters University of Calgary, The University of Calgary | Presentation | 2014-05-22 | N. Sinclair, 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 | | Spectroscopic investigations of a Ti:Tm:LiNbO3 waveguide for photon-echo quantum memory University of Calgary, The University of Calgary | Publication | 2009-11-01 | N. Sinclair, E. Saglamyurek, M. George, R. Ricken, C. La Mela, W. Sohler, W. Tittel | | Properties of a rare-earth-ion-doped waveguide at sub-Kelvin temperatures for quantum signal processing University of Calgary | Publication | 2017-03-01 | N. Sinclair, D. Oblak, C. W. Thiel, R. L. Cone, W. Tittel | | Tripartite Entanglement versus Tripartite Nonlocality in Three-Qubit Greenberger-Horne-Zeilinger-Class States University of Calgary | Publication | 2009-06-01 | S. Ghose, N. Sinclair, S. Debnath, P. Rungta, R. Stock | | Conditional Detection of Pure Quantum States of Light after Storage in a Tm-Doped Waveguide University of Calgary, The University of Calgary | Publication | 2012-02-01 | E. Saglamyurek, N. Sinclair, J. Jin, J. A. Slater, D. Oblak, F. Bussières, M. George, R. Ricken, W. Sohler, W. Tittel | | An integrated processor for photonic quantum states using a broadband light–matter interface University of Calgary, The University of Calgary | Publication | 2014-06-01 | E. Saglamyurek, N. Sinclair, J. A. Slater, K. Heshami, D. Oblak, W. Tittel | | An integrated processor for photonic quantum states using a broadband light-matter interface University of Calgary, The University of Calgary | Publication | 2014-01-01 | E. Saglamyurek, N. Sinclair, J. Slater, K. Heshami, D. Oblak, W. Tittel | | 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 | | Analysis of a tripartite Bell inequality for 3-qubit states University of Calgary | Publication | 2009-01-01 | S. Ghose, N. Sinclair, S. Debnath, A. Kabra | | Tripartite entanglement and nonlocality in 3-qubit states University of Calgary | Presentation | 2008-08-23 | S. Ghose, N. Sinclair | | Integrated quantum memory for quantum communication University of Calgary, The University of Calgary | Presentation | 2010-03-31 | E. Saglamyurek, N. Sinclair, C. La Mela, W. Tittel, M. George, R. Ricken, W. Sohler | | Integrated quantum memory for quantum communication University of Calgary, The University of Calgary | Presentation | 2010-04-01 | E. Saglamyurek, N. Sinclair, C. La Mela, W. Tittel, M. George, R. Ricken, W. Sohler | | Integrated photon-atom interface for quantum information University of Calgary, The University of Calgary | Presentation | 2010-04-26 | E. Saglamyurek, N. Sinclair, C. La Mela, W. Tittel, M. George, R. Ricken, W. Sohler | | Integrated quantum memory for quantum communication University of Calgary, The University of Calgary | Presentation | 2010-06-02 | E. Saglamyurek, N. Sinclair, J. Slater, J. Jin, F. Bussières, C. La Mela, W. Tittel, M. George, R. Ricken, W. Sohler | | 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 | | Integrated quantum memory for quantum communication University of Calgary, The University of Calgary | Presentation | 2010-03-21 | E. Saglamyurek, N. Sinclair, C. La Mela, W. Tittel, M. George, R. Ricken, W. Sohler | | Integrated quantum memory for quantum communication University of Calgary, The University of Calgary | Presentation | 2010-03-24 | E. Saglamyurek, N. Sinclair, C. La Mela, W. Tittel, M. George, R. Ricken, W. Sohler | | Integrated photon-atom interface for quantum information University of Calgary, The University of Calgary | Presentation | 2010-04-20 | E. Saglamyurek, N. Sinclair, M. George, R. Ricken, C. La Mela, W. Sohler, W. Tittel | | Integrated quantum memory for quantum communication University of Calgary, The University of Calgary | Presentation | 2010-05-27 | E. Saglamyurek, N. Sinclair, C. La Mela, W. Tittel, M. George, R. Ricken, W. Sohler | | Integrated quantum memory for quantum communication University of Calgary, The University of Calgary | Presentation | 2010-07-05 | E. Saglamyurek, N. Sinclair, J. Jin, J. Slater, F. Bussières, W. Tittel, M. George, R. Ricken, W. Sohler | | 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 | | Integrated quantum memory for sub-nanosecond non-classical light University of Calgary, The University of Calgary | Presentation | 2010-10-20 | E. Saglamyurek, N. Sinclair, J. Jin, J. Slater, D. Oblak, F. Bussières, W. Tittel, M. George, R. Ricken, W. Sohler | | 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 | 2011-06-07 | E. Saglamyurek, N. Sinclair, J. Jin, J. Slater, D. Oblak, F. Bussières, M. George, R. Ricken, W. Sohler, W. Tittel | | Broadband waveguide quantum memory for entangled photons University of Calgary, The University of Calgary | Presentation | 2011-07-18 | E. Saglamyurek, N. Sinclair, J. Jin, J. Slater, D. Oblak, F. Bussières, M. George, R. Ricken, W. Sohler, W. Tittel | | A broadband, waveguide quantum memory for entangled photons University of Calgary, The University of Calgary | Presentation | 2011-07-11 | E. Saglamyurek, N. Sinclair, J. Jin, J. Slater, D. Oblak, W. Tittel, F. Bussières, M. George, R. Ricken, W. Sohler | | Quantum memory for quantum repeater University of Calgary, The University of Calgary | Presentation | 2011-08-28 | E. Saglamyurek, N. Sinclair, J. Jin, J. Slater, D. Oblak, F. Bussières, M. George, R. Ricken, W. Sohler, 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 photons University of Calgary, The University of Calgary | Presentation | 2011-07-26 | E. Saglamyurek, N. Sinclair, J. Jin, J. Slater, D. Oblak, F. Bussières, M. George, R. Ricken, W. Sohler, 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 | | 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 | | 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 | | 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 | | 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 | | Macroscopic quantum communications using photonic qudits The University of Calgary, University of Calgary | Presentation | 2013-12-05 | W. Tittel, N. Sinclair, J. Slater, D. Oblak, I. Lucio Martinez, L. Giner, H. Mallahzadeh, L. P. Grimau, E. Saglamyurek | | An integrated processor for photonic quantum states using a broadband light-matter interface University of Calgary, The University of Calgary | Presentation | 2014-05-28 | E. Saglamyurek, N. Sinclair, J. Slater, K. Heshami, D. Oblak, W. Tittel | | An integrated processor for photonic quantum states using a broadband light-matter interface University of Calgary, The University of Calgary | Presentation | 2014-07-14 | E. Saglamyurek, N. Sinclair, J. Slater, K. Heshami, D. Oblak, 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 | | A cavity-enhanced waveguide quantum memory University of Calgary, The University of Calgary | Presentation | 2014-06-19 | H. Mallahzadeh, N. Sinclair, D. Oblak, W. Tittel | | Spectroscopic investigation of Tm:YGG for optical quantum memory University of Calgary, The University of Calgary | Presentation | 2014-07-14 | W. C. Thiel, N. Sinclair, W. Tittel, L. R. Cone | | Tm3+:Y3Ga5O12 materials for spectrally multiplexed quantum memories University of Calgary, The University of Calgary | Publication | 2014-10-01 | C. Thiel, N. Sinclair, W. Tittel, R. Cone | | An integrated processor for photonic quantum states using a broadband light-matter interface University of Calgary | Publication | 2014-06-01 | E. Saglamyurek, N. Sinclair, J. A. Slater, K. Heshami, D. Oblak | | 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. A. Slater, D. Oblak, F. Bussières, M. George, R. Ricken, W. Sohler, W. Tittel | | Multiqubit nonlocality in families of 3- and 4-qubit entangled states University of Calgary | Publication | 2010-10-01 | S. Ghose, S. Debnath, N. Sinclair, A. Kabra, R. Stock | | Broadband waveguide quantum memory for entangled photons The University of Calgary, University of Calgary | Presentation | 2011-03-10 | W. Tittel, E. Saglamyurek, N. Sinclair, J. Jin, J. Slater, D. Oblak, M. George, R. Ricken, W. Sohler | | 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 | | Towards quantum memoryThe implementation of many applications of quantum communication and computation such as quantum repeaters relies on the possibility to reversibly transfer quantum information between photons and atoms. Key properties for such a quantum memory are high recall efficiency and long storage times, and the capacity to store short photonic wavepackets with high fidelity. Our approach towards quantum state storage is based on rare-earth ion doped solid state material (crystalline and amorphous waveguides) at cryogenic temperature, and "controlled reversible inhomogeneous broadening" (CRIB) of a narrow absorption line [1]. Implementation of CRIB relies on the possibility to prepare such an absorption line out of an inhomogeneously broadened medium by means of optical pumping, and to broaden this line in a controlled and reversible way. After an introduction into CRIB, we will present spectroscopic investigations of Thulium doped Lithium Niobate waveguides and silicate fibers, and analyze these novel material candidates in view of the requirements for quantum memory. University of Calgary, The University of Calgary | Presentation | 2008-06-11 | E. Saglamyurek, A. Delfan, N. Sinclair, C. La Mela, 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 | | Two-photon interference with attenuated laser pulses stored in separate solid-state memories University of Calgary, The University of Calgary | Presentation | 2012-06-11 | J. Jin, E. Saglamyurek, N. Sinclair, J. Slater, D. Oblak, M. George, R. Ricken, W. Sohler, 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 | | Two-photon interference of weak coherent laser pulses recalled from separate solid-state quantum memories University of Calgary, The University of Calgary | Publication | 2013-08-01 | J. Jin, J. A. Slater, E. Saglamyurek, N. Sinclair, M. George, R. Ricken, D. Oblak, W. Sohler, W. Tittel | | Towards quantum repeaters using frequency multiplexing University of Calgary, The University of Calgary | Presentation | 2013-05-28 | L. P. Grimau, J. Slater, J. Jin, N. Sinclair, E. Saglamyurek, D. Oblak, M. Hedges, H. Mallahzadeh, W. Tittel | | Measuring and analyzing excitation-induced decoherence in rare-earth-doped optical materials University of Calgary, The University of Calgary | Publication | 2014-08-01 | C. W. Thiel, R. M. Macfarlane, Y. Sun, T. Böttger, N. Sinclair, W. Tittel, R. L. Cone | | 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 | | Tm:Ti:LiNbO3 waveguide for quantum memory applications University of Calgary, The University of Calgary | Presentation | 2010-04-09 | M. George, R. Ricken, W. Sohler, E. Saglamyurek, N. Sinclair, C. La Mela, W. Tittel | | 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 | 2012-07-24 | K. Heshami, A. Green, Y. Han, C. Simon, E. Saglamyurek, N. Sinclair, W. Tittel, C. Simon | | Memoire quantique intégrée The University of Calgary, University of Calgary | Presentation | 2010-05-11 | W. Tittel, C. La Mela, M. George, R. Ricken, E. Saglamyurek, N. Sinclair, W. Sohler | | 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 | | 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 | | 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 | | Quantum cryptography in the QC2 lab University of Calgary, The University of Calgary | Presentation | 2007-11-28 | F. Bussières, P. Chan, A. Delfan, S. Hosier, C. La Mela, I. Lucio Martinez, X. Mo, J. Nguyen, A. Rubenok, E. Saglamyurek, N. Sinclair, J. Slater, M. Underwood, W. Tittel | | Quantum Communication in the QC2 Lab University of Calgary, The University of Calgary | Presentation | 2011-07-06 | P. Chan, C. Dascollas, C. Healey, S. Hosier, J. Jin, V. Kiselyov, M. Lamont, I. Lucio Martinez, D. Oblak, A. Rubenok, E. Saglamyurek, N. Sinclair, J. Slater, T. Stuart, W. Tittel |
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