中国物理B ›› 2002, Vol. 11 ›› Issue (6): 529-532.doi: 10.1088/1009-1963/11/6/302

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Implementation of nonlocal quantum swap operation on two entangled pairs

郭光灿1, 陈立冰2, 顾永建3, 郑亦庄4   

  1. (1)Laboratory of Quantum Communication and Quantum Computation, University of Science and Technology of China, Hefei 230026, China; (2)Laboratory of Quantum Communication and Quantum Computation, University of Science and Technology of China, Hefei 230026, China; Department of Physics, Foshan University, Foshan 528000, China; (3)Laboratory of Quantum Communication and Quantum Computation, University of Science and Technology of China, Hefei 230026, China; Department of Physics, Weifang Universit
  • 收稿日期:2001-06-05 修回日期:2002-01-14 出版日期:2002-06-12 发布日期:2005-06-12
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 19874056).

Implementation of nonlocal quantum swap operation on two entangled pairs

Zheng Yi-Zhuang (郑亦庄)ab,  Gu Yong-Jian (顾永建)ac,  Chen Li-Bing (陈立冰)ab, Guo Guang-Can (郭光灿)a   

  1. a Laboratory of Quantum Communication and Quantum Computation, University of Science and Technology of China, Hefei 230026, China; b Department of Physics,  Wenzhou Normal College, Wenzhou 325027, China; c Department of Physics, Weifang University, Weifang, China; d Department of Physics, Foshan University, Foshan 528000, China
  • Received:2001-06-05 Revised:2002-01-14 Online:2002-06-12 Published:2005-06-12
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 19874056).

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摘要： We propose a scheme for the implementation of nonlocal quantum swap operation on two spatially separated entangled pairs and we show that the operation can swap two qubits of these entangled pairs. We discuss the resources of the entangled qubits and classical communication bits required for the optimal implementation of the nonlocal quantum swap operation. We also put forward a scheme for probabilistic implementation of nonlocal swap operation via a nonmaximally entangled quantum channel. The probability of a successful nonlocal swap operation is obtained by introducing a collective unitary transformation.

Abstract: We propose a scheme for the implementation of nonlocal quantum swap operation on two spatially separated entangled pairs and we show that the operation can swap two qubits of these entangled pairs. We discuss the resources of the entangled qubits and classical communication bits required for the optimal implementation of the nonlocal quantum swap operation. We also put forward a scheme for probabilistic implementation of nonlocal swap operation via a nonmaximally entangled quantum channel. The probability of a successful nonlocal swap operation is obtained by introducing a collective unitary transformation.

Key words: quantum nonlocality, swap operation, nonmaximally entangled

中图分类号:  (Entanglement measures, witnesses, and other characterizations)

  • 03.67.Mn
03.65.Ud (Entanglement and quantum nonlocality) 42.50.Dv (Quantum state engineering and measurements) 03.67.Lx (Quantum computation architectures and implementations) 03.67.Hk (Quantum communication)