The Interference Channel with Entangled Transmitters

TL;DR

This paper investigates how entanglement between transmitters can enhance communication over a classical interference channel, providing bounds on capacity and demonstrating potential quantum advantages in specific scenarios.

Contribution

It introduces inner and outer bounds on the capacity region for interference channels with entangled transmitters, highlighting quantum benefits over classical approaches.

Findings

Entanglement can significantly improve channel performance in certain cases.

Achievable rate expressions show similarities between classical and quantum scenarios.

Concrete example demonstrates quantum advantage in specific channel types.

Abstract

This paper explores communication over a two-sender, two-receiver classical interference channel, enhanced by the availability of entanglement resources between transmitters. The central contributions are an inner and outer bound on the capacity region for a general interference channel with entangled transmitters. It addresses the persistent challenge of the lack of a general capacity formula, even in the purely classical case, and highlights the striking similarities in achievable rate expressions when assessing quantum advantages. Through a concrete example, it is shown that entanglement can significantly boost performance in certain types of channels.