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Entropy 2018, 20(2), 72; https://doi.org/10.3390/e20020072

Entropy of Entanglement between Quantum Phases of a Three-Level Matter-Radiation Interaction Model

Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Apartado Postal 70-543, 04510 Mexico City, Mexico
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Received: 21 November 2017 / Revised: 4 January 2018 / Accepted: 5 January 2018 / Published: 24 January 2018
(This article belongs to the Special Issue Residual Entropy and Nonequilibrium States)
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Abstract

We show that the entropy of entanglement is sensitive to the coherent quantum phase transition between normal and super-radiant regions of a system of a finite number of three-level atoms interacting in a dipolar approximation with a one-mode electromagnetic field. The atoms are treated as semi-distinguishable using different cooperation numbers and representations of SU(3), variables which are relevant to the sensitivity of the entropy with the transition. The results are computed for all three possible configurations ( Ξ , Λ and V) of the three-level atoms. View Full-Text
Keywords: matter-radiation interaction; cooperation number; entropy of entanglement; quantum phase transition; representation theory; residual entropy matter-radiation interaction; cooperation number; entropy of entanglement; quantum phase transition; representation theory; residual entropy
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Quezada, L.F.; Nahmad-Achar, E. Entropy of Entanglement between Quantum Phases of a Three-Level Matter-Radiation Interaction Model. Entropy 2018, 20, 72.

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