Preparation and control of entangled states in the two-mode coherent fields interacting with a moving atom via two-photon process
Liu Xiao-Juan(刘小娟)a)b)†, Zhou Bing-Ju(周并举)a), Liu Ming-Wei (刘明伟)a), and Li Shou-Cun(李寿存)a)
a Department of Physics, Hunan University of Science and Technology, Xiangtan 411201, China; b Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China
Abstract We investigate the preparation and the control of entangled states in a system with the two-mode coherent fields interacting with a moving two-level atom via the two-photon transition. We discuss entanglement properties between the two-mode coherent fields and a moving two-level atom by using the quantum reduced entropy, and those between the two-mode coherent fields by using the quantum relative entropy. In addition, we examine the influences of the atomic motion and field-mode structure parameter $p$ on the quantum entanglement of the system. Our results show that the period and the duration of the prepared maximal atom-field entangled states and the frequency of maximal two-mode field entangled states can be controlled, and that a sustained entangled state of the two-mode field, which is independent of atomic motion and the evolution time, can be obtained, by choosing appropriately the parameters of atomic motion, field-mode structure, initial state and interaction time of the system.
(Mechanical effects of light on atoms, molecules, and ions)
Fund: Project supported by the
National Natural Science Foundation of China (Grant No
19874020), the Natural Science Foundation of Hunan Province,
China (Grant No 05JJ30004), and the Scientific Research Fund of
Hunan Provincial Education Department, China(Grant
Cite this article:
Liu Xiao-Juan(刘小娟), Zhou Bing-Ju(周并举), Liu Ming-Wei (刘明伟), and Li Shou-Cun(李寿存) Preparation and control of entangled states in the two-mode coherent fields interacting with a moving atom via two-photon process 2007 Chinese Physics 16 3685
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