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题名: Consistent approach for quantum measurement
作者: Zhang, P ;  Liu, XF ;  Sun, CP
刊名: PHYSICAL REVIEW A
出版日期: 2002
卷号: 66, 期号:4, 页码:-
关键词: WAVE-FUNCTION COLLAPSE ;  CURRENT SITUATION ;  PACKET COLLAPSE ;  DECOHERENCE ;  SUPERPOSITION ;  STATES ;  ENVIRONMENT ;  MECHANICS ;  MODEL
学科分类: Physics
通讯作者: Zhang, P , Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.
部门归属: Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China; Peking Univ, Dept Math, Beijing 100871, Peoples R China
英文摘要: In a close form without referring the time-dependent Hamiltonian to the total system, a consistent approach for quantum measurement is proposed based on Zurek's triple model of quantum decoherence [W. Zurek, Phys. Rev. D 24, 1516 (1981)]. An exactly solvable model based on the intracavity system is dealt with in detail to demonstrate the central idea in our approach: by peeling off one collective variable of the measuring apparatus from its many degrees of freedom, as the pointer of the apparatus, the collective variable decouples with the internal environment formed by the effective internal variables, but still interacts with the measured system to form a triple entanglement among the measured system, the pointer, and the internal environment. As another mechanism to cause decoherence, the uncertainty of relative phase and its many-particle amplification can be summed up to an ideal entanglement or a Shmidt decomposition with respect to the preferred basis.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000179502200014
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/13424
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:
Zhang, P,Liu, XF,Sun, CP. Consistent approach for quantum measurement[J]. PHYSICAL REVIEW A,2002,66(4):-.
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