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- W1573226979 abstract "Generating and characterising randomness is fundamentally important in both classical and quantum information science. Here we report the experimental demonstration of ensembles of pseudorandom optical processes comprising what are known as t-designs. We show that in practical scenarios, certain finite ensembles of two-mode transformations---1- and 2-designs---are indistinguishable from truly random operations for 1- and 2-photon quantum interference, but they fail to mimic randomness for 2- and 3-photon cases, respectively. This provides a novel optical test of pseudo randomness. We make use of the fact that t-photon behaviour is governed by degree-2t polynomials in the parameters of the optical process to experimentally verify the ensembles' behaviour for complete bases of polynomials. This ensures that outputs will be uniform for arbitrary configurations, satisfying the strict definition of pseudorandomness implicit in the mathematical definition." @default.
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- W1573226979 date "2015-02-17" @default.
- W1573226979 modified "2023-10-17" @default.
- W1573226979 title "Testing randomness with photons by direct characterization of optical<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mi>t</mml:mi></mml:math>-designs" @default.
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- W1573226979 doi "https://doi.org/10.1103/physreva.91.020301" @default.
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