Quantum Gaussian Channels with Weak Measurements

TL;DR

This paper investigates the capacity of quantum Gaussian channels when Bob employs only weak measurements, providing a novel analysis of how measurement strength affects information transmission.

Contribution

It introduces a new framework for analyzing quantum Gaussian channels with weak measurements, addressing the impact on channel capacity.

Findings

Weak measurements alter the effective channel capacity

Formulation of weak measurement theory in communication scenarios

Insights into quantum information transmission with limited measurement strength

Abstract

In this paper we perform a novel analysis of quantum Gaussian channels in the context of weak measurements. Suppose Alice sends classical information to Bob using a quantum channel. Suppose Bob is allowed to use only weak measurements, what would be the channel capacity? We formulate weak measurement theory in these terms and discuss the above question.