General bounds for sender-receiver capacities in multipoint quantum communications

We investigate the maximum rates for transmitting quantum information, distilling entanglement, and distributing secret keys between a sender and a receiver in a multipoint communication scenario, with the assistance of unlimited two-way classical communication involving all parties. First we consid...

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Bibliographic Details
Published in:arXiv.org 2017-11
Main Authors: Laurenza, Riccardo, Pirandola, Stefano
Format: Article
Language:English
Subjects:
Distillation
Economic models
Quantum entanglement
Quantum phenomena
Quantum theory
Receivers
Online Access:Get full text
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Summary:We investigate the maximum rates for transmitting quantum information, distilling entanglement, and distributing secret keys between a sender and a receiver in a multipoint communication scenario, with the assistance of unlimited two-way classical communication involving all parties. First we consider the case where a sender communicates with an arbitrary number of receivers, so called quantum broadcast channel. Here we also provide a simple analysis in the bosonic setting where we consider quantum broadcasting through a sequence of beamsplitters. Then, we consider the opposite case where an arbitrary number of senders communicate with a single receiver, so called quantum multiple-access channel. Finally, we study the general case of all-in-all quantum communication where an arbitrary number of senders communicate with an arbitrary number of receivers. Since our bounds are formulated for quantum systems of arbitrary dimension, they can be applied to many different physical scenarios involving multipoint quantum communication.
ISSN:2331-8422
DOI:10.48550/arxiv.1603.07262