In this work we design a specific simulation tool for quantumchannels which is based on the use of a control system. Thisallows us to simulate an average quantum channel which is ex-pressed in terms of an ensemble of channels, even when thesechannel-components are not jointly teleportation-covariant. Thisdesign is also extended to asymptotic simulations, continuousensembles, and memory channels. As an application, we deriverelative-entropy-of-entanglementupperboundsforprivatecom-munication over various channels, including non-Gaussian mix-tures of bosonic lossy channels. Among other results, we alsoestablish the two-way quantum and private capacity of the so-called“dephrasure”channel
Conditional channel simulation / Pirandola S.; Laurenza R.; Banchi L.. - In: ANNALS OF PHYSICS. - ISSN 0003-4916. - ELETTRONICO. - 400:(2019), pp. 289-302. [10.1016/j.aop.2018.11.014]
Conditional channel simulation
Banchi L.
2019
Abstract
In this work we design a specific simulation tool for quantumchannels which is based on the use of a control system. Thisallows us to simulate an average quantum channel which is ex-pressed in terms of an ensemble of channels, even when thesechannel-components are not jointly teleportation-covariant. Thisdesign is also extended to asymptotic simulations, continuousensembles, and memory channels. As an application, we deriverelative-entropy-of-entanglementupperboundsforprivatecom-munication over various channels, including non-Gaussian mix-tures of bosonic lossy channels. Among other results, we alsoestablish the two-way quantum and private capacity of the so-called“dephrasure”channel
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