Memory for Light as a Quantum Process University of Calgary | Publication | 2009-05-01 | M. Lobino, C. Kupchak, E. Figueroa, A. Lvovsky |

A peek into a quantum black box University of Calgary | Presentation | 2009-07-08 | M. Lobino, C. Kupchak, E. Figueroa, J. Appel, A. Lvovsky |

A continuous-variable approach to process tomographyWe propose and demonstrate experimentally a technique for estimating quantum-optical processes in the continuous-variable domain. The process data is determined by applying the process to a set of coherent states and measuring the output. The process output for an arbitrary input state can then be obtained from its Glauber-Sudarshan expansion. Although such expansion is generally singular, it can be arbitrarily well approximated with a regular function. University of Calgary | Presentation | 2008-08-26 | M. Lobino, E. Figueroa, D. Korystov, C. Kupchak, B. C. Sanders, A. Lvovsky |

Process tomography of quantum-optical memory University of Calgary | Presentation | 2009-01-05 | M. Lobino, C. Kupchak, E. Figueroa, A. Lvovsky |

Electromagnetically induced transparency and squeezed light University of Calgary | Presentation | 2008-05-22 | M. Lobino, J. Appel, E. Figueroa, D. Korystov, A. Lvovsky |

Do we need quantum light to test quantum memory? University of Calgary | Presentation | 2009-06-10 | M. Lobino, C. Kupchak, E. Figueroa, J. Appel, A. Lvovsky |

Coherent state quantum process tomographyAny quantum information device or circuit can be described as a quantum black box that maps input density matrices into the corresponding outputs. In this context, it is important to understand how the black box transforms a generic quantum state. This task requires a full characterization of the quantum process associated with the device by means of quantum process tomography (QPT). \r\nRecently, we developed a protocol, called coherent state QPT (csQPT), which recovers the process superoperator tensor by measuring, through homodyne tomography, the process outputs from a set of input coherent states. Hence, using a common laser source, at different intensities, we are able to reconstruct any quantum-optical process. \r\nOur technique is based on the fact that any input state density matrix can be decomposed in a superposition of coherent state density matrices using an approximated Glauber Sudarshan P-function. Then using the linearity of the process in the density matrix space, we can recover the effect of the process on the input state from the coherent state mapping. \r\nWe applied our procedure to a quantum memory for light based on electromagnetically-induced transparency in warm Rubidium atoms and recovered the superoperator tensor in Fock basis. From this analysis we were able to predict how an arbitrary quantum state of light will be affected by storage in a memory apparatus. We tested our characterization by experimentally storing and retrieving squeezed vacuum under different experimental conditions, and comparing the results with the csQPT prediction. We observed a quantum mechanical fidelity greater then 99%.\r\nThe process tomography also offers important insights into the detrimental effects that affect the storage performance and provide important feedback for the device optimization. Furthermore, we can check the memory performance against any theoretical benchmark.\r\n University of Calgary | Presentation | 2009-05-23 | M. Lobino |

Coherent-state quantum process tomography University of Calgary | Presentation | 2010-08-05 | M. Lobino, C. Kupchak, R. Kumar, E. Barrios, A. Hendriks, E. Figueroa, A. Lvovsky |

Quantum-optical process tomography using coherent states University of Calgary | Presentation | 2010-07-19 | M. Lobino, D. Korystov, C. Kupchak, E. Figueroa, R. Kumar, E. Barrios, S. Rahimi-Keshari, A. Scherer, B. C. Sanders, A. Lvovsky |

Propagation of squeezed vacuum under electromagnetically induced transparency University of Calgary | Publication | 2009-01-01 | E. Figueroa, M. Lobino, D. Korystov, J. Appel, A. I. Lvovsky |

Femtosecond laser writing of waveguides in periodically poled lithium niobate preserving the nonlinear coefficient University of Calgary | Publication | 2007-01-01 | R. Osellame, M. Lobino, N. Chiodo, M. Marangoni, G. Cerullo, R. Ramponi, H. T. Bookey, R. R. Thomson, N. D. Psaila, A. K. Kar |

Semiclassical motion of a multiband Bloch particle in a time-dependent field: Optical visualization University of Calgary | Publication | 2006-10-01 | S. Longhi, M. Lobino, M. Marangoni, R. Ramponi, P. Laporta, E. Cianci, V. Foglietti |

Optical parametric generation of nearly transform-limited mid-infrared pulses in dispersion-engineered nonlinear waveguides University of Calgary | Publication | 2008-01-01 | M. Marangoni, M. Lobino, R. Ramponi |

Spatial and temporal characterization of a Bessel beam produced using a conical mirror University of Calgary | Presentation | 2008-08-21 | K. Kuntz, B. Braverman, M. Lobino, A. Lvovsky |

Measurement of superluminal phase and group velocities of Bessel beams in free space University of Calgary | Publication | 2008-11-01 | B. Braverman, K. Kuntz, M. Lobino, S. Youn |

Quantum Memory for Squeezed Light University of Calgary | Publication | 2008-03-01 | J. Appel, E. Figueroa, D. Korystov, M. Lobino, A. Lvovsky |

Spatial and temporal characterization of a Bessel beam produced using a conical mirror University of Calgary | Publication | 2009-01-01 | K. Kuntz, B. Braverman, S. -. Youn, M. Lobino, S. Youn, A. Lvovsky |

Electromagnetically-induced transparency and squeezed light University of Calgary | Publication | 2009-01-01 | E. Figueroa, J. Appel, C. Kupchak, M. Lobino, D. Korystov, A. Lvovsky |

Electromagnetically-induced transparency and squeezed light University of Calgary | Presentation | 2008-08-20 | E. Figueroa, J. Appel, D. Korystov, M. Lobino, C. Kupchak, A. Lvovsky |

Interfacing quantum light with atoms using electromagnetically-induced transparency University of Calgary | Presentation | 2008-08-12 | E. Figueroa, J. Appel, D. Korystov, M. Lobino, A. Lvovsky |

Spatial and temporal characterization of a Bessel beam produced using a conical mirror University of Calgary | Publication | 2009-05-01 | K. Kuntz, B. Braverman, S. -. Youn, M. Lobino, S. Youn |

Electromagnetically-induced transparency and squeezed light University of Calgary | Publication | 2009-05-01 | E. Figueroa, J. Appel, C. Kupchak, M. Lobino, D. Korystov |

Spatial and temporal characterization of a Bessel beam produced using a conical mirror University of Calgary | Publication | 2009-04-01 | K. Kuntz, B. Braverman, S. -. Youn, M. Lobino, S. Youn |

Quantum memory for squeezed light University of Calgary | Publication | 2008-03-01 | J. Appel, E. Figueroa, D. Korystov, M. Lobino |

Electromagnetically-induced transparency for quantum optical information processingWe report storage and retrieval of pulsed squeezed vacuum in rubidium vapor using electromagnetically-induced transparency. For the first time, complete tomographic characterization of the quantum state after the storage procedure has been performed, making our setup a universal test bed for a generic quantum optical memory system.
University of Calgary | Presentation | 2008-06-30 | A. Lvovsky, J. Appel, E. Figueroa, D. Korystov, M. Lobino |

Quantum memory for squeezed lightWe study electromagnetically-induced transparency (EIT) as a tool for slowing down and storing squeezed light. The experiments are conducted in rubidium vapour, and the squeezed vacuum state is prepared by means of an optical parametric amplifier. Full homodyne tomography of the squeezed vacuum pulse before and after the interaction with the EIT cell provides insight into the phenomena that degrade the storage fidelity. University of Calgary | Presentation | 2008-07-03 | A. Lvovsky, J. Appel, E. Figueroa, D. Korystov, M. Lobino |