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Sun, CP; Zhou, DL; Yu, SX; Liu, XF; Sun, CP , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.
Quantum decoherence from adiabatic entanglement with external one or a few degrees of freedom
Source PublicationEUROPEAN PHYSICAL JOURNAL D
KeywordWave-function Collapse Dissipative System Phase-factors Approximations Model Factorization Interference Realization Computation Evolution
AbstractBased 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.
2001
ISSN1434-6060
Volume13Issue:1Pages:145-155
Subject AreaPhysics
Indexed BySCI
Citation statistics
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/12838
Collection理论物理所科研产出_SCI论文
Corresponding AuthorSun, CP , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.
Recommended Citation
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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