Quantum correlations in the 1D spin-1/2 Ising model with added Dzyaloshinskii-Moriya interaction

TL;DR

This paper investigates quantum correlations in a 1D spin-1/2 Ising model with Dzyaloshinskii-Moriya interaction and magnetic field, analyzing quantum discord and entanglement at finite temperatures.

Contribution

It introduces a mean-field fermionization approach to analyze quantum correlations in the model, highlighting differences between quantum discord and concurrence.

Findings

Quantum discord and concurrence vary with temperature and interaction parameters.

The macroscopic thermodynamical witness can detect entanglement regions.

Results are relevant for quantum information processing applications.

Abstract

We have considered the 1D spin-1/2 Ising model with added Dzyaloshinskii-Moriya (DM) interaction and presence of a uniform magnetic field. Using the mean-field fermionization approach the energy spectrum in an infinite chain is obtained. The quantum discord (QD) and concurrence between nearest neighbor (NN) spins at finite temperature are specified as a function of mean-field order parameters. A comparison between concurrence and QD is done and differences are obtained. The macroscopic thermodynamical witness is also used to detect quantum entanglement region in solids within our model. We believe our results are useful in the field of the quantum information processing.