Enhancement of quantum correlations between two particles under decoherence in finite temperature environment

TL;DR

This paper demonstrates that weak measurement and measurement reversal can enhance and protect quantum correlations in two-particle systems under finite temperature decoherence, improving their robustness for quantum information tasks.

Contribution

It introduces a method using weak measurement and measurement reversal to enhance quantum correlations in qubit-qubit and qutrit-qutrit systems under amplitude damping channels.

Findings

Quantum correlations are increased after weak measurement and reversal.

The joint system exhibits greater robustness against decoherence.

Quantum correlations are measured by local quantum uncertainty.

Abstract

Enhancing the quantum correlations in realistic quantum systems interacting with the environment of finite temperature is an important subject in quantum information processing. In this paper, we use weak measurement and measurement reversal to enhance the quantum correlations in a quantum system consisting of two particles. The transitions of the quantum correlations measured by the local quantum uncertainty of qubit-qubit and qutrit-qutrit quantum systems under generalized amplitude damping channels are investigated. We show that, after the weak measurement and measurement reversal, the joint system shows more robustness against decoherence.