Enhancement of thermal entanglement in two-qubit XY models

Abstract

We analyze conditions leading to enhancement of thermal entanglement in two-qubit XY models. The effect of including cross-product terms, besides the standard XY exchange interactions, in the presence of an external magnetic field, is investigated. We show that entanglement can be yield at elevated temperatures by tuning the orientation of the external magnetic field. The details of the intrinsic exchange interactions determine the optimal orientation.

4 PS figures, to appear in Journal of Optics B

References in corpus (1)

• Encoded Universality for Generalized Anisotropic Exchange Hamiltonians

Cited by in corpus (4)

• Enhanced the thermal Entanglement in Anisotropy XYZ Heisenberg Chain
• Three-qubit Thermal Entanglement via Entanglement Swapping on Two-qubit Heisenberg XY chains
• Effects of environmental parameters to total, quantum and classical correlations
• On the Correlations Between Quantum Entanglement and q-Information Measures