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题名: Nonlinear mechanism of charge-qubit decoherence in a lossy cavity: Quasi-normal-mode approach
作者: Gao, YB ;  Wang, YD ;  Sun, CP
刊名: PHYSICAL REVIEW A
出版日期: 2005
卷号: 71, 期号:3, 页码:-
关键词: MACROSCOPIC QUANTUM STATES ;  COOPER-PAIR-BOX ;  JOSEPHSON-JUNCTION
学科分类: Physics
通讯作者: Gao, YB , Beijing Univ Technol, Dept Appl Phys, Beijing 100022, Peoples R China.
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
英文摘要: 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.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000228632100017
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/13867
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Gao, YB,Wang, YD,Sun, CP. Nonlinear mechanism of charge-qubit decoherence in a lossy cavity: Quasi-normal-mode approach[J]. PHYSICAL REVIEW A,2005,71(3):-.
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