Quantum state redistribution based on a generalized decoupling

TL;DR

This paper introduces a simplified one-shot quantum state redistribution protocol derived from existing quantum information protocols, with improved resource rates for tensor power states.

Contribution

It presents a new, simplified protocol for one-shot quantum state redistribution, unifying and extending previous quantum source coding methods.

Findings

Protocol is simpler and more symmetric.

Achieves better resource rates for tensor power states.

Based on combining quantum reverse Shannon and Slepian-Wolf protocols.

Abstract

We develop a simple protocol for a one-shot version of quantum state redistribution, which is the most general two-terminal source coding problem. The protocol is simplified from a combination of protocols for the fully quantum reverse Shannon and fully quantum Slepian-Wolf problems, with its time-reversal symmetry being apparent. When the protocol is applied to the case where the redistributed states have a tensor power structure, more natural resource rates are obtained.