中国物理B ›› 2011, Vol. 20 ›› Issue (2): 20305-020305.doi: 10.1088/1674-1056/20/2/020305

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Distributed quantum computation with superconducting qubit via LC circuit using dressed states

曹帅1, 方卯发2, 肖兴2, 李艳玲2, 吴超3   

  1. (1)College of Sciences, South China Agricultural University, Guangzhou 510642, China; (2)Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, and Department of Physics, Hunan Normal University, Changsha 410081, China; (3)Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, and Department of Physics, Hunan Normal University, Changsha 410081, China; College of Sciences, South China Agricultural University, Guangzhou 510642, Chin
  • 收稿日期:2009-10-03 修回日期:2010-02-05 出版日期:2011-02-15 发布日期:2011-02-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 11074072), the Natural Science Foundation of Hunan Province of China (Grant Nos. 07JJ3013 and 07JJ5003), and the Science Foundation of the Education Bureau of Hunan Province of China (Grant No. 06A038).

Distributed quantum computation with superconducting qubit via LC circuit using dressed states

Wu Chao(吴超)a)c), Fang Mao-Fa(方卯发) a)†, Xiao Xing(肖兴)a), Li Yan-Ling(李艳玲)a), and Cao Shuai(曹帅) b)   

  1. a Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, and Department of Physics, Hunan Normal University, Changsha 410081, China; b College of Sciences, South China Agricultural University, Guangzhou 510642, China; c Department of Physics, ZhouNan High School of Hunan Province, Changsha 410081, China
  • Received:2009-10-03 Revised:2010-02-05 Online:2011-02-15 Published:2011-02-15
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 11074072), the Natural Science Foundation of Hunan Province of China (Grant Nos. 07JJ3013 and 07JJ5003), and the Science Foundation of the Education Bureau of Hunan Province of China (Grant No. 06A038).

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摘要： A scheme is proposed where two superconducting qubits driven by a classical field interacting separately with two distant LC circuits connected by another LC circuit through mutual inductance, are used for implementing quantum gates. By using dressed states, quantum state transfer and quantum entangling gate can be implemented. With the help of the time-dependent electromagnetic field, any two dressed qubits can be selectively coupled to the data bus (the last LC circuit), then quantum state can be transferred from one dressed qubit to another and multi-mode entangled state can also be formed. As a result, the promising perspectives for quantum information processing of mesoscopic superconducting qubits are obtained and the distributed and scalable quantum computation can be implemented in this scheme.

关键词: superconducting qubit, quantum state transfer, quantum entangling gate

Abstract: A scheme is proposed where two superconducting qubits driven by a classical field interacting separately with two distant LC circuits connected by another LC circuit through mutual inductance, are used for implementing quantum gates. By using dressed states, quantum state transfer and quantum entangling gate can be implemented. With the help of the time-dependent electromagnetic field, any two dressed qubits can be selectively coupled to the data bus (the last LC circuit), then quantum state can be transferred from one dressed qubit to another and multi-mode entangled state can also be formed. As a result, the promising perspectives for quantum information processing of mesoscopic superconducting qubits are obtained and the distributed and scalable quantum computation can be implemented in this scheme.

Key words: superconducting qubit, quantum state transfer, quantum entangling gate

中图分类号:  (Quantum computation architectures and implementations)

  • 03.67.Lx
05.60.Gg (Quantum transport) 74.50.+r (Tunneling phenomena; Josephson effects)