Atom-field entanglement in the Jaynes–Cummings modelwithout rotating wave approximation

doi:10.1088/1674-1056/24/4/040306

›› 2015, Vol. 24 ›› Issue (4): 40306-040306.doi: 10.1088/1674-1056/24/4/040306

Atom-field entanglement in the Jaynes–Cummings modelwithout rotating wave approximation

M. Mirzaee, M. Batavani

Department of Physics, Faculty of Science, Arak University, Arak 38156-8-8349, Iran

收稿日期:2013-12-04 修回日期:2014-03-08 出版日期:2015-04-05 发布日期:2015-04-05

Atom-field entanglement in the Jaynes–Cummings modelwithout rotating wave approximation

M. Mirzaee, M. Batavani

Department of Physics, Faculty of Science, Arak University, Arak 38156-8-8349, Iran

Received:2013-12-04 Revised:2014-03-08 Online:2015-04-05 Published:2015-04-05
Contact: M. Mirzaee E-mail:m-mirzaee@araku.ac.ir

摘要/Abstract

摘要： In this paper, we present a structure for obtaining the exact eigenfunctions and eigenvalues of the Jaynes-Cummings model (JCM) without the rotating wave approximation (RWA). We study the evolution of the system in the strong coupling region using the time evolution operator without RWA. The entanglement of the system without RWA is investigated using the Von Neumann entropy as an entanglement measure. It is interesting that in the weak coupling regime, the population of the atomic levels and Von Neumann entropy without RWA model shows a good agreement with the RWA whereas in strong coupling domain, the results of these two models are quite different.

关键词: atom-photon interaction, Jaynes-Cummings model, quantum entanglement

Abstract: In this paper, we present a structure for obtaining the exact eigenfunctions and eigenvalues of the Jaynes-Cummings model (JCM) without the rotating wave approximation (RWA). We study the evolution of the system in the strong coupling region using the time evolution operator without RWA. The entanglement of the system without RWA is investigated using the Von Neumann entropy as an entanglement measure. It is interesting that in the weak coupling regime, the population of the atomic levels and Von Neumann entropy without RWA model shows a good agreement with the RWA whereas in strong coupling domain, the results of these two models are quite different.

Key words: atom-photon interaction, Jaynes-Cummings model, quantum entanglement

中图分类号: (Entanglement measures, witnesses, and other characterizations)

03.67.Mn

42.50.-p (Quantum optics) 03.65.Ud (Entanglement and quantum nonlocality)

M. Mirzaee, M. Batavani. Atom-field entanglement in the Jaynes–Cummings modelwithout rotating wave approximation[J]. , 2015, 24(4): 40306-040306.

M. Mirzaee, M. Batavani. Atom-field entanglement in the Jaynes–Cummings modelwithout rotating wave approximation[J]. Chin. Phys. B, 2015, 24(4): 40306-040306.

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Atom-field entanglement in the Jaynes–Cummings modelwithout rotating wave approximation

Atom-field entanglement in the Jaynes–Cummings modelwithout rotating wave approximation

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