Decoherence effect on quantum correlation and entanglement in a two-qubit spin chain

TL;DR

This paper investigates how decoherence impacts quantum correlations and entanglement in a two-qubit spin chain modeled by the Heisenberg XY model with Dzyaloshinskii-Moriya interaction, revealing conditions for their stability.

Contribution

It analyzes the effects of different environments on quantum correlations and entanglement, highlighting how Hamiltonian parameters can sustain correlations under decoherence.

Findings

Entanglement can vanish at a critical DM interaction value without affecting other correlations.

Correlations are more resilient than entanglement under environmental effects.

Manipulating Hamiltonian parameters can preserve correlations in dissipative environments.

Abstract

Assuming a two-qubit system in Werner state which evolves in Heisenberg XY model with Dzyaloshinskii-Moriya (DM) interaction under the effect of different environments. We evaluate and compare quantum entanglement, quantum and classical correlation measures. It is shown that in the absence of decoherence effects, there is a critical value of DM interaction for which entanglement may vanish while quantum and classical correlations do not. In the presence of environment the behavior of correlations depends on the kind of system-environment interaction. Correlations can be sustained by manipulating Hamiltonian anisotropic-parameter in a dissipative environment. Quantum and classical correlations are more stable than entanglement generally.