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2015 ; 1
(3
): e1400255
Nephropedia Template TP
Bentivegna M
; Spagnolo N
; Vitelli C
; Flamini F
; Viggianiello N
; Latmiral L
; Mataloni P
; Brod DJ
; Galvão EF
; Crespi A
; Ramponi R
; Osellame R
; Sciarrino F
Sci Adv
2015[Apr]; 1
(3
): e1400255
PMID26601164
show ga
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.