中国物理B ›› 2009, Vol. 18 ›› Issue (3): 910-914.doi: 10.1088/1674-1056/18/3/011

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Scheme for realizing quantum computation and quantum information transfer with superconducting qubits coupling to a 1D transmission line resonator

施振刚, 谌雄文, 朱喜香, 宋克慧   

  1. Department of Physics and Electronic Information Science, Huaihua University, Huaihua 418008, China Research Institute of Information Science, Huaihua University, Huaihua 418008, China
  • 收稿日期:2007-09-20 修回日期:2008-07-06 出版日期:2009-03-20 发布日期:2009-03-20
  • 基金资助:
    Project supported by Hunan Provincial Natural Science Foundation of China (Grant No 06JJ50014) and the Key Project Foundation of the Education Commission of Hunan Province of China (Grant No 06A055).

Scheme for realizing quantum computation and quantum information transfer with superconducting qubits coupling to a 1D transmission line resonator

Shi Zhen-Gang(施振刚)†, Chen Xiong-Wen(谌雄文), Zhu Xi-Xiang(朱喜香), and Song Ke-Hui(宋克慧)   

  1. Department of Physics and Electronic Information Science, Huaihua University, Huaihua 418008, China; Research Institute of Information Science, Huaihua University, Huaihua 418008, China
  • Received:2007-09-20 Revised:2008-07-06 Online:2009-03-20 Published:2009-03-20
  • Supported by:
    Project supported by Hunan Provincial Natural Science Foundation of China (Grant No 06JJ50014) and the Key Project Foundation of the Education Commission of Hunan Province of China (Grant No 06A055).

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摘要： This paper proposes a simple scheme for realizing one-qubit and two-qubit quantum gates as well as multiqubit entanglement based on dc-SQUID charge qubits through the control of their coupling to a 1D transmission line resonator (TLR). The TLR behaves effectively as a quantum data-bus mode of a harmonic oscillator, which has several practical advantages including strong coupling strength, reproducibility, immunity to 1/f noise, and suppressed spontaneous emission. In this protocol, the data-bus does not need to stay adiabatically in its ground state, which results in not only fast quantum operation, but also high-fidelity quantum information processing. Also, it elaborates the transfer process with the 1D transmission line.

关键词: dc-SQUID charge qubits, 1D transmission line resonator, quantum logic gates, quantum information transfer

Abstract: This paper proposes a simple scheme for realizing one-qubit and two-qubit quantum gates as well as multiqubit entanglement based on dc-SQUID charge qubits through the control of their coupling to a 1D transmission line resonator (TLR). The TLR behaves effectively as a quantum data-bus mode of a harmonic oscillator, which has several practical advantages including strong coupling strength, reproducibility, immunity to 1/f noise, and suppressed spontaneous emission. In this protocol, the data-bus does not need to stay adiabatically in its ground state, which results in not only fast quantum operation, but also high-fidelity quantum information processing. Also, it elaborates the transfer process with the 1D transmission line.

Key words: dc-SQUID charge qubits, 1D transmission line resonator, quantum logic gates, quantum information transfer

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

  • 03.67.Lx
03.67.Mn (Entanglement measures, witnesses, and other characterizations) 85.25.Dq (Superconducting quantum interference devices (SQUIDs)) 42.50.Pq (Cavity quantum electrodynamics; micromasers)