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

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

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.

Keywords: atom-photon interaction Jaynes-Cummings model quantum entanglement

Received: 04 December 2013
Revised: 08 March 2014
Accepted manuscript online:

PACS:	03.67.Mn	(Entanglement measures, witnesses, and other characterizations)
	42.50.-p	(Quantum optics)
	03.65.Ud	(Entanglement and quantum nonlocality)

Corresponding Authors: M. Mirzaee
E-mail: m-mirzaee@araku.ac.ir

Cite this article:

M. Mirzaee, M. Batavani Atom-field entanglement in the Jaynes–Cummings modelwithout rotating wave approximation 2015 Chin. Phys. B 24 040306

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