Title

A meta-converse for private communication over quantum channels

Document Type

Conference Proceeding

Publication Date

8-9-2017

Abstract

We establish a converse bounds on the private transmission capabilities of a quantum channel. The main conceptual development builds firmly on the notion of a private state, which is a powerful, uniquely quantum method for simplifying the tripartite picture of privacy involving local operations and public classical communication to a bipartite picture of quantum privacy involving local operations and classical communication. This approach has previously led to some of the strongest upper bounds on secret key rates, including the squashed entanglement and the relative entropy of entanglement. Here we use this approach along with a "privacy test" to establish a general meta-converse bound for private communication.

Publication Source (Journal or Book title)

IEEE International Symposium on Information Theory - Proceedings

First Page

291

Last Page

295

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