Quantum Steering vs Entanglement and Extracting Work in an Anisotropic Two-Qubit Heisenberg Model in Presence of External Magnetic Fields with DM and KSEA Interactions

TL;DR

This paper investigates quantum correlations, work extraction, and efficiency in an anisotropic two-qubit Heisenberg model with DM and KSEA interactions under thermal conditions and magnetic fields.

Contribution

It introduces analysis of quantum steering, entanglement, and work extraction in a complex two-qubit model with specific interactions and external fields, highlighting their thermal behavior.

Findings

Quantum entanglement (concurrence) is more robust than quantum steering under thermal effects.

Work extraction is comparable to the system's bare energies.

Quantum correlations are fragile at higher temperatures.

Abstract

We examine the Dzyaloshinski-Moriya (DM) and Kaplan-Shekhtman-Entin-Wohlman-Aharony (KSEA) interactions in thermal equilibrium submitted to the anisotropic Heisenberg two-qubit model in an inhomogeneous magnetic field. The steerability between the two qubits is evaluated using quantum steering. The concurrence serves as a witness to quantum entanglement. Both the extracted work and the ideal efficiency of the two qubits are quantified. We discuss how quantum correlations behave in relation to the bath's temperature and the Kaplan-Shekhtman-Entin-Wohlman-Aharony coupling parameter. We find that the nonclassical correlations in a two-qubit Heisenberg XYZ Model are fragile under thermal effects. Nevertheless, the results indicate that the concurrence is stronger than quantum steering under thermal effects. We obtained that an extraction of work is comparable with the bare energies.