Protecting three-dimensional entanglement from correlated amplitude damping channel

TL;DR

This paper compares two strategies, WM+QMR and EAM+QMR, for protecting three-dimensional entanglement from correlated amplitude damping noise, finding EAM+QMR more effective.

Contribution

It introduces and evaluates environment-assisted measurement combined with quantum measurement reversal as a superior method for entanglement protection under CAD noise.

Findings

EAM+QMR outperforms WM+QMR in entanglement preservation.

EAM+QMR increases success probabilities for certain qutrit entangled states.

Correlation effects significantly influence entanglement protection effectiveness.

Abstract

Quantum entanglement is a crucial resource in quantum information processing, and protecting it against noise poses a significant challenge. This paper introduces two strategies for preserving qutrit-qutrit entanglement in the presence of correlated amplitude damping (CAD) noise: weak measurement (WM) and environment-assisted measurement (EAM), both combined with quantum measurement reversal (QMR). Two prototypical classes of three-dimensional entangled states are examined. The findings demonstrate that while the WM+QMR method can partially retain entanglement, the EAM+QMR approach is more effective at protecting entanglement as well as enhancing success probabilities, particularly for specific qutrit-qutrit entangled states. Additionally, we thoroughly discuss the impact of correlation effects on entanglement protection and the enhancement of success probability. Our results provide valuable insights into defending high-dimensional entanglement from CAD noise, thus offering practical solutions for the advancement of quantum information technologies.