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Nonlinear mechanism of charge-qubit decoherence in a lossy cavity: Quasi-normal-mode approach
Gao, YB; Wang, YD; Sun, CP; Gao, YB , Beijing Univ Technol, Dept Appl Phys, Beijing 100022, Peoples R China.
2005
发表期刊PHYSICAL REVIEW A
ISSN1050-2947
卷号71期号:3页码:-
摘要From the viewpoint of quasinormal modes, we describe a decoherence mechanism of charge qubit of Josephson junctions (JJ) in a lossy microcavity, which can appear in a realistic experiment for quantum computation based on a JJ qubit. We show that nonlinear coupling of a charge qubit to the quantum cavity field can result in additional dissipation of the resonant mode due to the effective interaction between those nonresonant modes and the resonant mode, which is induced by the charge qubit itself. We calculate the characteristic time of the decoherence by making use of the system plus bath method.
部门归属Beijing Univ Technol, Dept Appl Phys, Beijing 100022, Peoples R China; Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China; Nankai Univ, Dept Phys, Tianjin 300071, Peoples R China
关键词Macroscopic Quantum States Cooper-pair-box Josephson-junction
学科领域Physics
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收录类别SCI
WOS记录号WOS:000228632100017
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被引频次:9[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/13867
专题理论物理所1978-2010年知识产出
通讯作者Gao, YB , Beijing Univ Technol, Dept Appl Phys, Beijing 100022, Peoples R China.
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Gao, YB,Wang, YD,Sun, CP,et al. Nonlinear mechanism of charge-qubit decoherence in a lossy cavity: Quasi-normal-mode approach[J]. PHYSICAL REVIEW A,2005,71(3):-.
APA Gao, YB,Wang, YD,Sun, CP,&Gao, YB , Beijing Univ Technol, Dept Appl Phys, Beijing 100022, Peoples R China..(2005).Nonlinear mechanism of charge-qubit decoherence in a lossy cavity: Quasi-normal-mode approach.PHYSICAL REVIEW A,71(3),-.
MLA Gao, YB,et al."Nonlinear mechanism of charge-qubit decoherence in a lossy cavity: Quasi-normal-mode approach".PHYSICAL REVIEW A 71.3(2005):-.
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