Atomic Physics Seminars

Quantum Information Seminar
Thursday, April 3, 2014
2:00 PM
Physics Building, Room 313
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"BosonSampling with Controllable Distinguishability of Photons"

Barry Sanders , University of Calgary
[Host: Olivier Pfister]
The BosonSampling Problem is to sample output photon-coincidence probabilities given vacuum and single-photon inputs to a passive interferometer with more channels than photons. This problem is classically hard to simulate as these probabilities are weighted by computationally hard permanents of sub-matrices of the interferometer transition matrix yet efficient to execute quantumly. Our innovation [1,2] introduces distinguishability between photons by controlling arrival times of otherwise identical photons in order to test the model, assess sampling errors and generalize BosonSampling beyond permanent-weighted to immanant-weighted probabilities.
[1] S.-H. Tan, Y. Y. Gao, H. de Guise and B. C. Sanders, “SU(3) Quantum Interferometry with single-photon input pulses”, Physical Review Letters110 (11): 113603 (5 pp.), 12 March 2013,
[2] H. de Guise, S.-H. Tan, I. P. Poulin and B. C. Sanders, “”Immanants for three-channel linear optical networks”,

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