中国物理B ›› 2007, Vol. 16 ›› Issue (4): 919-922.doi: 10.1088/1009-1963/16/4/009

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Entanglement swapping without joint measurement via a Λ-type atom interacting with bimodal cavity field

林秀, 李洪才, 杨榕灿, 黄志平   

  1. School of Physics and OptoElectronics Technology, Fujian Normal University, Fuzhou 350007, China
  • 收稿日期:2006-06-06 修回日期:2006-08-01 出版日期:2007-04-20 发布日期:2007-04-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10574022), the Funds of the Natural Science of Fujian Province, China (Grant No Z0512006).

Entanglement swapping without joint measurement via a $\Lambda$-type atom interacting with bimodal cavity field

Lin Xiu(林秀)†, Li Hong-Cai(李洪才), Yang Rong-Can(杨榕灿), and Huang Zhi-Ping(黄志平)   

  1. School of Physics and OptoElectronics Technology, Fujian Normal University, Fuzhou 350007, China
  • Received:2006-06-06 Revised:2006-08-01 Online:2007-04-20 Published:2007-04-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10574022), the Funds of the Natural Science of Fujian Province, China (Grant No Z0512006).

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摘要： This paper proposes a scheme for realizing entanglement swapping in cavity QED. The scheme is based on the resonant interaction of a two-mode cavity field with a {\Lambda}-type three-level atom. In contrast with the previously proposed schemes, the present scheme is ascendant, since the fidelity is 1.0 and the joint measurement isn't needed. And the scheme is experimentally feasible based on the current cavity QED technique.

关键词: entanglement swapping, \Lambda-type atom, two-mode cavity field, joint measurement

Abstract: This paper proposes a scheme for realizing entanglement swapping in cavity QED. The scheme is based on the resonant interaction of a two-mode cavity field with a $\Lambda$-type three-level atom. In contrast with the previously proposed schemes, the present scheme is ascendant, since the fidelity is 1.0 and the joint measurement isn't needed. And the scheme is experimentally feasible based on the current cavity QED technique.

Key words: entanglement swapping, $\Lambda$-type atom, two-mode cavity field, joint measurement

中图分类号:  (Quantum state engineering and measurements)

  • 42.50.Dv
42.50.Pq (Cavity quantum electrodynamics; micromasers) 42.50.Ct (Quantum description of interaction of light and matter; related experiments) 03.67.Mn (Entanglement measures, witnesses, and other characterizations)