中国物理B ›› 2006, Vol. 15 ›› Issue (10): 2315-2319.doi: 10.1088/1009-1963/15/10/020

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Generation of four-atom cluster states in thermal cavity and implementing remote controlled not gate

杨榕灿, 李洪才, 陈美香, 林　秀   

  1. School of Physics and OptoElectronics Technology, Fujian Normal University, Fuzhou 350007, China
  • 收稿日期:2005-10-04 修回日期:2006-01-18 出版日期:2006-10-20 发布日期:2006-10-20
  • 基金资助:
    Project supported by the National Natural Science Foundation (Grant No 10574022), and the Funds of the Natural Science of Fujian Province, China (Grant No Z0512006).

Generation of four-atom cluster states in thermal cavity and implementing remote controlled not gate

Yang Rong-Can(杨榕灿), Li Hong-Cai(李洪才)†, Chen Mei-Xiang(陈美香), and Lin Xiu(林秀)   

  1. School of Physics and OptoElectronics Technology, Fujian Normal University, Fuzhou 350007, China
  • Received:2005-10-04 Revised:2006-01-18 Online:2006-10-20 Published:2006-10-20
  • Supported by:
    Project supported by the National Natural Science Foundation (Grant No 10574022), and the Funds of the Natural Science of Fujian Province, China (Grant No Z0512006).

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摘要： We propose an experimentally feasible scheme for preparing a four-atom cluster state in a thermal cavity. In the scheme, the cavity field is only virtually excited and the photon-number-dependent part in the effective Hamiltonian is cancelled so that the system is insensitive to the cavity decay and the thermal field. At the same time, the scheme can be generalized to prepare n-atom cluster states with the success probability 100\%. In addition, using the four-atom cluster state, we also propose a simpler scheme for implementing a remote--controlled not gate (CNOT) without the Bell states measurement.

关键词: atomic cluster states, two-level atom, thermal cavity, remote CNOT gate

Abstract: We propose an experimentally feasible scheme for preparing a four-atom cluster state in a thermal cavity. In the scheme, the cavity field is only virtually excited and the photon-number-dependent part in the effective Hamiltonian is cancelled so that the system is insensitive to the cavity decay and the thermal field. At the same time, the scheme can be generalized to prepare n-atom cluster states with the success probability 100%. In addition, using the four-atom cluster state, we also propose a simpler scheme for implementing a remote--controlled not gate (CNOT) without the Bell states measurement.

Key words: atomic cluster states, two-level atom, thermal cavity, remote CNOT gate

中图分类号: 

  • 42.50.Ar
03.67.Lx (Quantum computation architectures and implementations) 36.40.-c (Atomic and molecular clusters) 42.50.Dv (Quantum state engineering and measurements)