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Quantum decoherence from adiabatic entanglement with external one or a few degrees of freedom
Sun, CP; Zhou, DL; Yu, SX; Liu, XF; Sun, CP , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.
2001
发表期刊EUROPEAN PHYSICAL JOURNAL D
ISSN1434-6060
卷号13期号:1页码:145-155
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.
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
关键词Wave-function Collapse Dissipative System Phase-factors Approximations Model Factorization Interference Realization Computation Evolution
学科领域Physics
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收录类别SCI
WOS记录号WOS:000166418300016
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被引频次:16[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/311006/12838
专题理论物理所1978-2010年知识产出
通讯作者Sun, CP , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.
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GB/T 7714
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.
APA Sun, CP,Zhou, DL,Yu, SX,Liu, XF,&Sun, CP , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China..(2001).Quantum decoherence from adiabatic entanglement with external one or a few degrees of freedom.EUROPEAN PHYSICAL JOURNAL D,13(1),145-155.
MLA Sun, CP,et al."Quantum decoherence from adiabatic entanglement with external one or a few degrees of freedom".EUROPEAN PHYSICAL JOURNAL D 13.1(2001):145-155.
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