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TT: Fachverband Tiefe Temperaturen
TT 74: Focus Session: Many-Body Interference and Quantum Statistical Physics
(Joint session of DY and TT organized by DY)
TT 74.5: Invited Talk
Thursday, March 10, 2016, 17:15–17:45, H20
Boson sampling with integrated quantum photonics — •Fabio Sciarrino — Dipartimento Sapienza, Università di Roma, Roma, Italy
Boson sampling is a computational task strongly believed to be hard for classical computers, but efficiently solvable by orchestrated bosonic interference in a specialized quantum computer. Current experimental schemes, however, are still insufficient for a convincing demonstration of the advantage of quantum over classical computation. A new variation of this task, scattershot boson sampling, leads to an exponential increase in speed of the quantum device, using a larger number of photon sources based on parametric down-conversion. This is achieved by having multiple heralded single photons being sent, shot by shot, into different random input ports of the interferometer. We report the first scattershot boson sampling experiments, where six different photon-pair sources are coupled to integrated photonic circuits. We use recently proposed statistical tools to analyze our experimental data, providing strong evidence that our photonic quantum simulator works as expected. This approach represents an important leap toward a convincing experimental demonstration of the quantum computational supremacy.