Year: 2026
Type: preprint
Abstract: We propose an \textit{in situ} method for certifying the multiparticle indistinguishability of identical bosons or fermions in generic linear interferometers. For particles occupying distinct input ports, the method uses two-particle marginal bunching or anti-bunching probabilities to bound full multiparticle indistinguishability through Aldous' spectral gap theorem. For Haar-random unitary interferometers, the number of experimental runs required to estimate this bound to a prescribed precision, at fixed confidence, is polynomial in the particle number, the interferometer size, and the inverse precision, with high probability over the choice of interferometer. Losses are incorporated without conditioning on particle survival. The method is particularly suited to certifying photon indistinguishability in large-scale interference experiments, including Boson Sampling experiments targeting quantum computational advantage.
Source: arXiv (Cornell University)
Author: Shchesnovich, Valery
Institution: Universidade Federal do ABC
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Award: G8137433663
OpenAlex ID: W7223040568