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Conditional channel simulation
DOI:10.1016/j.aop.2018.11.014.png)
Abstract
En 中文
In this work we design a specific simulation tool for quantum channels which is based on the use-of a control system. This allows us to simulate an average quantum channel which is ex pressed in terms of an ensemble of channels, even when these channel-components are not jointly teleportation-covariant. This design is also extended to asymptotic simulations, continuous ensembles, and memory channels. As an application, we derive relative-entropy-of-entanglement upper bounds for private communication over various channels, including non-Gaussian mixtures of bosonic lossy channels. Among other results, we also establish the two-way quantum and private capacity of the socalled dephrasure channel. (C) 2018 Elsevier Inc. All rights reserved.
Keywords:
RELATIVE ENTROPY
QUANTUM
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