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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…
quant-ph2026
Calculating trace distances of bosonic states in Krylov subspace
Javier MartÃnez-Cifuentes, Nicolás Quesada
Continuous-variable quantum systems are central to quantum technologies, with Gaussian states playing a key role due to their broad applicability and simple description via first a…
quant-ph2024
Photon-number moments and cumulants of Gaussian states
Yanic Cardin, Nicolás Quesada
We develop closed-form expressions for the moments and cumulants of Gaussian states when measured in the photon-number basis. We express the photon-number moments of a Gaussian sta…