Capacities of Lossy Bosonic Memory Channels
نویسندگان
چکیده
منابع مشابه
Quantum capacities of bosonic channels.
We investigate the capacity of bosonic quantum channels for the transmission of quantum information. We calculate the quantum capacity for a class of Gaussian channels, including channels describing optical fibers with photon losses, by proving that Gaussian encodings are optimal. For arbitrary channels we show that achievable rates can be determined from few measurable parameters by proving th...
متن کاملEvaluating capacities of bosonic Gaussian channels
We show how to compute or at least to estimate various capacity-related quantities for bosonic Gaussian channels. Among these are the coherent information, the entanglement-assisted classical capacity, the one-shot classical capacity, and a quantity involving the transpose operation, shown to be a general upper bound on the quantum capacity, even allowing for finite errors. All bounds are expli...
متن کاملPrivacy of a lossy bosonic memory channel
Quantum communications concern the study of quantum channels that also use continuous alphabets [1]. These can be modeled by bosonic field modes whose phase space quadratures enable for continuous variable encoding/decoding. Lossy bosonic channel, which consists of a collection of bosonic modes that lose energy en route from the transmitter to the receiver, belongs to the class of Gaussian chan...
متن کاملQuantum entanglement enhances the capacity of bosonic channels with memory
Nicolas J. Cerf, Julien Clavareau, Chiara Macchiavello, and Jérémie Roland QUIC, Ecole Polytechnique, CP 165/59, Université Libre de Bruxelles, B-1050 Brussels, Belgium QUIT, Dipartimento di Fisica “A. Volta,” Universitá di Pavia, via Bassi 6, I-27100 Pavia, Italy Laboratoire de Recherche en Informatique, UMR 8263, Université Paris-Sud, 91405 Orsay, France Received 11 January 2005; published 27...
متن کاملClassical capacity of the lossy bosonic channel: the exact solution.
The classical capacity of the lossy bosonic channel is calculated exactly. It is shown that its Holevo information is not superadditive, and that a coherent-state encoding achieves capacity. The capacity of far-field, free-space optical communications is given as an example.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2010
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.104.030501