Entanglement of two Jaynes-Cummings atoms in single-excitation space |
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Authors: | Ya Yang Yan Liu Jing Lu Lan Zhou |
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Institution: | 1.Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, Department of Physics and Synergetic Innovation Center of Quantum Effects and Applications, Key Laboratory for Matter Microstructure and Function of Hunan Province, Hunan Normal University, Changsha 410081, China;2.College of Physics and Electronic Engineering, Hengyang Normal University, Hengyang 421002, China |
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Abstract: | We study the entanglement dynamics of two atoms coupled to their own Jaynes-Cummings cavities in single-excitation space. Here, we use concurrence to measure atomic entanglement, and consider the Bell-like states to be initial states. Our analysis suggests that collapse and revival take place in entanglement dynamics. The physical mechanism behind entanglement dynamics is periodic information and energy exchange between atoms and light fields. For the initial Bell-like states, evolutionary periodicity of the atomic entanglement can only be found if the ratio of the two atom-cavity coupling strengths is a rational number. Also, whether there is a time translation between two kinds of initial Bell-like state depends on odd versus even numbers of the coupling-strength ratio. |
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Keywords: | cavity optomechanics Jaynes-Cummings cavities single excitation entanglement dynamics |
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