Author

Oliver Reardon-Smith

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Preprint Oct 2026

Characterizing Photonic Partial Distinguishability Through Gram Matrix Tomography

Partial distinguishability affects multiphoton interference, which is central to large-scale photonic experiments such as Boson Sampling and to applications of multiphoton states across quantum technologies. Characterizing the internal degrees of freedom responsible for this behavior is challenging: in many scenarios t...

Marcin Kotowski, Marco Robbio, Oliver Reardon-Smith et al. · 0 citations

Preprint Sep 2026

Fast classical simulation algorithms for free-fermion dynamics with magic input

The classical cost of simulating free-fermion (matchgate) circuits depends on both the input state and the computational task. We develop classical algorithms for circuits with non-Gaussian inputs, addressing exact sampling and both additive-error and exact estimation of expectation values. For inputs consisting of $n$...

Jiwon Heo, Oliver Reardon-Smith, Michał Oszmaniec et al. · 0 citations