Dense Coding Capacity in Correlated Noisy Channels with Weak Measurement

TL;DR

This paper investigates how weak and reversal measurements can enhance quantum dense coding capacity in correlated noisy channels, showing significant improvements in amplitude damping channels but minimal effects in phase damping and depolarizing channels.

Contribution

It demonstrates the potential of weak measurement strategies to improve dense coding capacity specifically in correlated amplitude damping channels.

Findings

Weak measurement improves capacity in amplitude damping channels.

Minimal improvement in phase damping and depolarizing channels.

Correlated noise channels behave differently under measurement strategies.

Abstract

Capacity of dense coding via correlated noisy channel is greater than that in uncorrelated noisy channel. It is shown that weak measurement and reversal measurement can make further effort to improve quantum dense coding capacity in correlated amplitude damping channel, but this effort is very small in correlated phase damping channel and correlated depolarizing channel.