Violation of Bell inequality for thermal states of interaction qubits via a multi-qubit Heisenberg model

Preprint

27 February 2002

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.quant-ph/0111165

Abstract

We study the violations of Bell inequality for thermal states of qubits in a multi-qubit Heisenberg model as a function of temperature and external magnetic fields. Unlike the behaviors of the entanglement the violation can not be obtained by increasing the temperature or the magnetic field. The threshold temperatures of the violation are found be less than that of the entanglement. We also consider a realistic cavity-QED model which is a special case of the mutli-qubit Heisenberg model.

Keywords

INEQUALITY FOR THERMAL
VIOLATIONS OF BELL
BELL INEQUALITY
MAGNETIC FIELDS
THERMAL STATES
MULTI QUBIT
HEISENBERG
QUBIT
MODEL

All Related Versions

Version 1, 2001-11-30, ArXiv
Version 2, 2001-12-02, ArXiv
Version 3, 2001-12-09, ArXiv
Version 4, 2002-02-27, ArXiv
Published version: New Journal of Physics, 4 (1), 11.

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