Three-body entanglement induced by spontaneous emission in a three two-level atoms system |
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Authors: | Liao Xiang-Ping Fang Mao-F Zheng Xiao-Juan and Cai Jian-Wu |
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Institution: | College of Physics and Information Science, Hunan Normal University, Changsha 410081, China; Department of Physics and Electronics, Zhuzhou Teacher College, Zhuzhou 412007, China |
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Abstract: | We study three-body entanglement induced by spontaneous
emission in a three two-level atoms system by using the entanglement
tensor approach. The results show that the amount of entanglement
is strongly dependent on the initial state of the system and the species
of atoms. The three-body entanglement is the result of the coherent
superposition of the two-body entanglements. The larger the
two-body entanglement is, the stronger the three-body entanglement
is. On the other hand, if there exists a great difference in three two-body entanglement measures,
the three-body entanglement is very weak.
We also find that the maximum of the two-body entanglement
obtained with nonidentical atoms is greater than that obtained
with identical atoms via adjusting the difference in atomic frequency. |
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Keywords: | spontaneous emission entanglement measures |
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