One-step implementing three-qubit phase gate via manipulating rf SQUID qubits in the decoherence-free subspace with respect to cavity decay
Shao Xiao-Qiang(邵晓强)a), Chen Li(陈丽)b), Zhang Shou(张寿)a)b)†, and Zhao Yong-Fang(赵永芳)a)
a Centre for the Condensed-Matter Science and Technology, Harbin Institute of Technology, Harbin 150001, China; b Department of Physics, College of Science, Yanbian University, Yanji 133002, China
Abstract We present a scheme for implementing a three-qubit phase gate via manipulating rf superconducting quantum interference device (SQUID) qubits in the decoherence-free subspace with respect to cavity decay. Through appropriate changes of the coupling constants between rf SQUIDs and cavity, the scheme can be realized only in one step. A high fidelity is obtained even in the presence of decoherence.
Received: 21 April 2009
Revised: 14 May 2009
Accepted manuscript online:
PACS:
03.67.Lx
(Quantum computation architectures and implementations)
Fund: Project supported by the National
Natural Science Foundation of China (Grant No 60667001).
Cite this article:
Shao Xiao-Qiang(邵晓强), Chen Li(陈丽), Zhang Shou(张寿), and Zhao Yong-Fang(赵永芳) One-step implementing three-qubit phase gate via manipulating rf SQUID qubits in the decoherence-free subspace with respect to cavity decay 2009 Chin. Phys. B 18 5161
Qubits based on semiconductor quantum dots Xin Zhang(张鑫), Hai-Ou Li(李海欧), Ke Wang(王柯), Gang Cao(曹刚), Ming Xiao(肖明), Guo-Ping Guo(郭国平). Chin. Phys. B, 2018, 27(2): 020305.
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