From the physics to the computational complexity of multiboson correlation interference

Simon Laibacher, Vincenzo Tamma

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We demonstrate how the physics of multiboson correlation interference leads to the computational complexity of linear optical interferometers based on correlation measurements in the degrees of freedom of the input bosons. In particular, we address the task of multiboson correlation sampling (MBCS) from the probability distribution associated with polarization- and time-resolved detections at the output of random linear optical networks. We show that the MBCS problem is fundamentally hard to solve classically even for nonidentical input photons, regardless of the color of the photons, making it also very appealing from an experimental point of view. These results fully manifest the quantum computational supremacy inherent to the fundamental nature of quantum interference.
Original languageEnglish
Article number243605
JournalPhysical Review Letters
Issue number24
Publication statusPublished - 11 Dec 2015
Externally publishedYes


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