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boson sampling 1gradient computation 1parameter-shift rule 1photon loss 1quantum optics 1

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quant-ph2026

Parameter-Shift Rules for Gradients in Boson Sampling Experiments

Marius Trudeau, Pierre-Emmanuel Emeriau, Nicolás Quesada

The paper derives n‑th order parameter‑shift rules for computing gradients of Fock boson‑sampling probabilities in lossy interferometers, shows that such rules generally cannot be…