Concentration of Non-maximally Entangled States via Entanglement Swapping in Cavity QED

被引：0
作者：
Xian-Cai Wang
Ming Yang
机构：
[1] Anhui University,Key Laboratory of Opto
[2] Chizhou University,electronic Information Acquisition and Manipulation, Ministry of Education, School of Physics & Material Science
来源：
International Journal of Theoretical Physics | 2011年 / 50卷
关键词：
Coherent state; Entanglement concentration; Entanglement swapping; Highly detuned interaction; Cavity QED;
D O I：
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中图分类号：
学科分类号：
摘要：
Using the highly detuned interaction between Λ-type three-level atoms and coherent optical fields in cavity QED, we can create a maximally entangled state between an atom and a cavity mode from a non-maximally entangled atomic state and a non-maximally entangled coherent state via entanglement swapping. The averaged output entanglement of the scheme is the product of the initial two non-maximal entanglements rather than the sum of them. The impact made by the spontaneous emission from the atomic excited levels has been canceled here, which makes the current protocol more feasible.
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页码：1479 / 1485
页数：6
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