中国物理B ›› 2009, Vol. 18 ›› Issue (2): 588-592.doi: 10.1088/1674-1056/18/2/033

• CLASSICAL AREAS OF PHENOMENOLOGY • 上一篇    下一篇

Robust generation of high-fidelity entangled states for multiple atoms

林丽华   

  1. Department of Physics, Fuzhou University, Fuzhou 350002, China
  • 收稿日期:2008-05-22 修回日期:2008-09-24 出版日期:2009-02-20 发布日期:2009-02-20
  • 基金资助:
    Project supported by the Doctorate Foundation of the State Education Ministry of China (Grant No 20070386002).

Robust generation of high-fidelity entangled states for multiple atoms

Lin Li-Hua(林丽华)†   

  1. Department of Physics, Fuzhou University, Fuzhou 350002, China
  • Received:2008-05-22 Revised:2008-09-24 Online:2009-02-20 Published:2009-02-20
  • Supported by:
    Project supported by the Doctorate Foundation of the State Education Ministry of China (Grant No 20070386002).

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摘要： A scheme is presented for generating entangled states of multiple atoms in a cavity. In the scheme the atoms simultaneously interact with a cavity mode, with the first atom driven by two classical fields and the other atoms driven by a classical field. Our scheme is valid even if the cavity decay rate is larger than the effective coupling strength, which is important for experiment. The generation of entangled states is conditional on the detection of a photon decaying from the cavity and thus the fidelity of the entangled state is insensitive to the detection inefficiency. Furthermore, the scheme can be applied to the case with any number of atoms in principle.

Abstract: A scheme is presented for generating entangled states of multiple atoms in a cavity. In the scheme the atoms simultaneously interact with a cavity mode, with the first atom driven by two classical fields and the other atoms driven by a classical field. Our scheme is valid even if the cavity decay rate is larger than the effective coupling strength, which is important for experiment. The generation of entangled states is conditional on the detection of a photon decaying from the cavity and thus the fidelity of the entangled state is insensitive to the detection inefficiency. Furthermore, the scheme can be applied to the case with any number of atoms in principle.

Key words: cavity QED, entangled state, optical cavity

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

  • 42.50.Dv
42.50.Pq (Cavity quantum electrodynamics; micromasers) 03.65.Ud (Entanglement and quantum nonlocality)