中国物理B ›› 2008, Vol. 17 ›› Issue (1): 43-48.doi: 10.1088/1674-1056/17/1/008

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Cluster-state preparation in thermal cavities without single-qubit operation

张小龙1, 冯芒2, 高克林2   

  1. (1)Center for Modern Physics and Department of Physics, Chongqing University, Chongqing\, 400044, China\^b)State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences,; (2)State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan\,430071, China
  • 出版日期:2008-01-20 发布日期:2008-01-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China ( Grant Nos 10474118 and 60490280), the Hubei Provincial Foundation for distinguished scholars, and the National Basic Research Program of China (Grant Nos 2005CB724502 and 2006CB921203

Cluster-state preparation in thermal cavities without single-qubit operation

Zhang Xiao-Long(张小龙)a)b)c), Feng Mang(冯芒)b), and Gao Ke-Lin(高克林)b)   

  1. a Center for Modern Physics and Department of Physics, Chongqing University, Chongqing 400044, China；b State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China; c Graduate School of the Chinese Academy of Sciences, Beijing 100080, China
  • Online:2008-01-20 Published:2008-01-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China ( Grant Nos 10474118 and 60490280), the Hubei Provincial Foundation for distinguished scholars, and the National Basic Research Program of China (Grant Nos 2005CB724502 and 2006CB921203

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摘要： A potential scheme is proposed for generating cluster states of many atoms in cavity quantum electradynamics (QED), in which an unorthodox encoding is employed with the ground state being qubit $\left\vert 0\right\rangle $ while two closely spaced upper states being qubit $\left\vert 1\right\rangle $. Throughout the scheme the cavities can be in thermal states but are only virtually excited. We show how to create the cluster states by performing a two-step but no single-qubit operation. Discussion is also carried out on the experimental feasibility of our scheme.

关键词: cluster-state, cavity QED, entanglement, quantum computing

Abstract: A potential scheme is proposed for generating cluster states of many atoms in cavity quantum electradynamics (QED), in which an unorthodox encoding is employed with the ground state being qubit $\left\vert 0\right\rangle $ while two closely spaced upper states being qubit $\left\vert 1\right\rangle $. Throughout the scheme the cavities can be in thermal states but are only virtually excited. We show how to create the cluster states by performing a two-step but no single-qubit operation. Discussion is also carried out on the experimental feasibility of our scheme.

Key words: cluster-state, cavity QED, entanglement, quantum computing

中图分类号:  (Cavity quantum electrodynamics; micromasers)

  • 42.50.Pq
03.67.Lx (Quantum computation architectures and implementations)