Improving the capacity of quantum dense coding by weak measurement and reversal measurement

TL;DR

This paper proposes a protocol using weak measurement and reversal measurement to enhance quantum dense coding capacity in amplitude damping channels, effectively protecting entanglement and improving information transmission.

Contribution

It introduces a novel protocol that increases quantum dense coding capacity by employing weak and reversal measurements in amplitude damping channels.

Findings

Quantum dense coding capacity is improved with the protocol.

Entanglement is effectively protected against amplitude damping.

The protocol is effective across different damping coefficients.

Abstract

A protocol of quantum dense coding protection of two qubits is proposed in amplitude damping (AD) channel using weak measurement and reversal measurement. It is found that the capacity of quantum dense coding under the weak measurement and reversal measurement is always greater than that without weak measurement and reversal measurement. When the protocol is applied, for the AD channels with different damping coefficient, the result reflects that quantum entanglement can be protected and quantum dense coding becomes successful.