# BosonSampling with Controllable Distinguishability of Photons

Date and time |
Mar 28, 2014 from 11:10 AM to 12:00 PM |
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Location | Room MP606, 60 St. George Street, Toronto |

Host | Aephraim M. Steinberg |

## Barry Sanders

**
University of Calgary
**

**Abstract:**

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, arXiv.org:1208.5677.

[2] H. de Guise, S.-H. Tan, I. P. Poulin and B. C. Sanders, “”Immanants for three-channel linear optical networks”, arXiv.org:1402.2391.

*(PLEASE NOTE NON-STANDARD LOCATION)*

Contact Name | Aephraim M. Steinberg |
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