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题名: Quantum decoherence from adiabatic entanglement with external one or a few degrees of freedom
作者: Sun, CP ;  Zhou, DL ;  Yu, SX ;  Liu, XF
刊名: EUROPEAN PHYSICAL JOURNAL D
出版日期: 2001
卷号: 13, 期号:1, 页码:145-155
关键词: WAVE-FUNCTION COLLAPSE ;  DISSIPATIVE SYSTEM ;  PHASE-FACTORS ;  APPROXIMATIONS ;  MODEL ;  FACTORIZATION ;  INTERFERENCE ;  REALIZATION ;  COMPUTATION ;  EVOLUTION
学科分类: Physics
通讯作者: Sun, CP , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.
部门归属: Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China; Chinese Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China; Peking Univ, Dept Math, Beijing 100871, Peoples R China
英文摘要: Based on the Born-Oppenhemer approximation, the concept of adiabatic quantum entanglement is introduced to account for quantum decoherence of a quantum system due to its interaction with a large system of one or a few degrees of freedom. In the adiabatic limit, it is shown that the wave function of the total system formed by the quantum system plus the large system can be factorized as an entangled state with correlation between adiabatic quantum states and quasi-classical motion configurations of the large system. In association with a novel viewpoint about quantum measurement, which has been directly verified by most recent experiments [e.g., S. Durr et al., Nature 33, 359 (1998)], it is shown that the adiabatic entanglement is indeed responsible for the quantum decoherence and thus can be regarded as a "clean" quantum measurement when the large system behaves as a classical object. By baking the large system respectively to be a macroscopically distinguishable spatial variable, a high spin system and a harmonic oscillator with a coherent initial state, three illustrations are presented with their explicit solutions in this paper.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000166418300016
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/12838
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:
Sun, CP,Zhou, DL,Yu, SX,et al. Quantum decoherence from adiabatic entanglement with external one or a few degrees of freedom[J]. EUROPEAN PHYSICAL JOURNAL D,2001,13(1):145-155.
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