Zero field entanglement in dipolar coupling spin system at negative temperatures

A dipolar coupled spin system can achieve internal thermodynamic equilibrium states at negative absolute temperature. We study analytically and numerically the temperature dependence of the concurrence in a dipolar coupled spin-1/2 system in both non-zero and zero fields and show that, at negative t...

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Bibliographic Details
Published in:arXiv.org 2013-09
Main Authors: Furman, Gregory B, Meerovich, Victor M, Sokolovsky, Vladimir L
Format: Article
Language:English
Subjects:
Dipole interactions
Entangled states
Entanglement
Temperature
Temperature dependence
Thermodynamic equilibrium
Online Access:Get full text
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Summary:A dipolar coupled spin system can achieve internal thermodynamic equilibrium states at negative absolute temperature. We study analytically and numerically the temperature dependence of the concurrence in a dipolar coupled spin-1/2 system in both non-zero and zero fields and show that, at negative temperatures, entangled states can exist even in zero magnetic field.
ISSN:2331-8422