The classical capacity of a noisy optical channel is the maximum rate at which information can be transmitted reliably, given a constraint on the mean input energy. For the ubiquitous bosonic Gaussian channels, which include standard models of loss and noise in fibre and free-space optical links, determining this rate...
G. Adesso, Ludovico Lami, V. Giovannetti· 0 citations
This article formalizes the routing, message-copy, and walker retrieval phases for both variants and shows how the short-range approach improves the architecture's feasibility for near-term experimental implementation, and confirms that the short-range approach achieves the optimal $\mathcal{O}(n+m)$ circuit depth.
Giuseppe De Riso, Giuseppe Catalano, S. Lloyd et al.· 0 citations
The quantum capacity of the bosonic thermal attenuator, which is given by the regularization of its coherent information, is unknown. The seminal work of Holevo and Werner established in 1999 the standard one-use lower bound obtained from input thermal states. We first prove that this long-standing lower bound is the e...
Francesco Anna Mele, Giuseppe Catalano, Marco Fanizza et al.· 0 citations
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