Archivio istituzionale della ricerca della Scuola Normale Superiore
IRIS SNS è l'archivio istituzionale destinato a raccogliere, conservare e diffondere ad accesso aperto la produzione scientifica degli autori afferenti alla Scuola Normale Superiore.
EnglishThe long-standing conjectures of the optimality of Gaussian inputs for Gaussian channel and Gaussian additivity are solved for a broad class of covariant or contravariant Bosonic Gaussian channels (which includes in particular thermal, additive classical noise, and amplifier channels) restricting to the class of states with finite second moments. We show that the vacuum is the input state which minimizes the entropy at the output of such channels. This allows us to show also that the classical capacity of these channels (under the input energy constraint) is additive and is achieved by Gaussian encodings.
| Titolo: | A Solution of Gaussian Optimizer Conjecture for Quantum Channels | |
| Autori: | ||
| Data di pubblicazione: | 2014 | |
| Rivista: | ||
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1007/s00220-014-2150-6 | |
| Parole Chiave: | Quantum Physics; Quantum Physics; Mathematical Physics; Mathematics - Mathematical Physics | |
| Handle: | http://hdl.handle.net/11384/60416 | |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
File in questo prodotto:
http://hdl.handle.net/11384/60416
Copyright © 2022