Quantum capacity of lossy channel with additive classical Gaussian noise : a perturbation approach

2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/139151For a quantum channel of additive Gaussian noise with loss, in the general case of $n$ copies input, we show that up to first order perturbation, any non-Gaussian perturbation to the product thermal state input has a less quantum information transmission rate when the input energy tend to infinitive.4 pagesQuantum PhysicsQuantum capacity of lossy channel with additive classical Gaussian noise : a perturbation approachtext