中国物理B ›› 2002, Vol. 11 ›› Issue (9): 876-880.doi: 10.1088/1009-1963/11/9/304

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Preparation of entangled squeezed states and quantification of their entanglement

蔡新华1, 匡乐满2   

  1. (1)Department of Physics, Changde Normal College, Changde 415000, China;  (2)Department of Physics, Hunan Normal University, Changsha 410081, China
  • 收稿日期:2001-12-18 修回日期:2002-03-04 出版日期:2002-09-12 发布日期:2005-06-12
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10075018), and the State Key Development Programme for Basic Research of China (Grant No 2001CB309309).

Preparation of entangled squeezed states and quantification of their entanglement

Cai Xin-Hua (蔡新华)ab, Kuang Le-Man (匡乐满)b   

  1. a Department of Physics, Changde Normal College, Changde 415000, China; b Department of Physics, Hunan Normal University, Changsha 410081, China
  • Received:2001-12-18 Revised:2002-03-04 Online:2002-09-12 Published:2005-06-12
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10075018), and the State Key Development Programme for Basic Research of China (Grant No 2001CB309309).

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摘要： We propose a scheme for generating bipartite and multipartite entangled squeezed states via the Jaynes－Cummings model with large detuning. Bipartite entanglement of these entangled states is quantified by the concurrence. We also use the N-tangle to compute multipartite entanglement of these multipartite entangled squeezed states. Finally we discuss two limiting cases which arise from r→∞ and r→0, in which the multipartite entangled squeezed state reduces correspondingly into an N-qubit Greenberger－Horne－Zeilinger state and an N-qubit W state.

Abstract: We propose a scheme for generating bipartite and multipartite entangled squeezed states via the Jaynes－Cummings model with large detuning. Bipartite entanglement of these entangled states is quantified by the concurrence. We also use the N-tangle to compute multipartite entanglement of these multipartite entangled squeezed states. Finally we discuss two limiting cases which arise from r→∞ and r→0, in which the multipartite entangled squeezed state reduces correspondingly into an N-qubit Greenberger－Horne－Zeilinger state and an N-qubit W state.

Key words: quantum entanglement, squeezed state, Jaynes－Cummings model

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

  • 42.50.Dv
03.65.Ud (Entanglement and quantum nonlocality)