All phase-space linear bosonic channels are approximately Gaussian dilatable
نویسندگان
چکیده
منابع مشابه
Strong converse for the classical capacity of all phase-insensitive bosonic Gaussian channels
Submitted for the DAMOP14 Meeting of The American Physical Society Strong converse for the classical capacity of all phase-insensitive bosonic Gaussian channels BHASKAR ROY BARDHAN, Department of Physics and Astronmoy, Louisiana State University, USA, RAUL GARCIAPATRON, Ecole Polytechnique de Bruxelles, Universite Libre de Bruxelles, Belgium and Max-Planck Institut fuer Quantenoptik, Germany, M...
متن کاملMulti-mode bosonic Gaussian channels
A complete analysis of multi-mode bosonic Gaussian channels is proposed. We clarify the structure of unitary dilations of general Gaussian channels involving any number of bosonic modes and present a normal form. The maximum number of auxiliary modes that is needed is identified, including all rank deficient cases, and the specific role of additive classical noise is highlighted. By using this ...
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 کاملBlack holes as bosonic Gaussian channels
We identify the quantum channels corresponding to the interaction of a Gaussian quantum state with an already formed Schwarzschild black hole. Using recent advances in the classification of one-mode bosonic Gaussian channels, we find that (with one exception) the black hole Gaussian channels lie in the nonentanglement breaking subset of the lossy channels CðlossÞ, amplifying channels CðampÞ and...
متن کاملPhase-space analysis of bosonic spontaneous emission
We present phase-space techniques for the modelling of spontaneous emission in two-level bosonic atoms. The positive-P representation is shown to give a full and complete description within the limits of our model. The Wigner representation, even when truncated at second order, is shown to need a doubling of the phase-space to allow for a positive-definite diffusion matrix in the appropriate Fo...
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: New Journal of Physics
سال: 2018
ISSN: 1367-2630
DOI: 10.1088/1367-2630/aae738