Quantum discord protection from amplitude damping decoherence

Abstract

Entanglement is known to be an essential resource for many quantum information processes. However, it is now known that some quantum features may be acheived with quantum discord, a generalized measure of quantum correlation. In this paper, we study how quantum discord, or more specifically, the measures of entropic discord and geometric discord are affected by the influence of amplitude damping decoherence. We also show that a protocol deploying weak measurement and quantum measurement reversal can effectively protect quantum discord from amplitude damping decoherence, enabling to distribute quantum correlation between two remote parties in a noisy environment.

arXiv comment7 pages, 3 figures

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Cited by in corpus (5)

• Deterministic generation of maximally discordant mixed states by dissipation
• Recovering the lost steerability of quantum states within non-Markovian environments by utilizing quantum partially collapsing measurements
• Generation of a non-zero discord bipartite state with classical second-order interference
• Enhancing quantum state transfer efficiency in binary-tree spin networks by partially collapsing measurements
• Protecting an unknown qubit state by weak measurement