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题名: Understanding the destruction of nth-order quantum coherence in terms of multipath interference
作者: Zhou, DL ;  Zhang, P ;  Sun, CP
刊名: PHYSICAL REVIEW A
出版日期: 2002
卷号: 66, 期号:1, 页码:-
关键词: DECOHERENCE ;  COMPUTERS
学科分类: Physics
通讯作者: Zhou, DL , Tsing Hua Univ, Ctr Adv Study, Beijing 100084, Peoples R China.
部门归属: Tsing Hua Univ, Ctr Adv Study, Beijing 100084, Peoples R China; Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China
英文摘要: The classic example of the destruction of interference fringes in a "which-way" experiment, caused by an environmental interaction, may be viewed as the destruction of first-order coherence as defined by Glauber many years ago [Phys. Rev. 130, 2529 (1963); 131, 2766 (1963)]. However, the influence of an environment can also destroy the nth-order quantum coherence in a quantum system, where this high order coherence is captured. We refer to this phenomenon as the nth-order decoherence. In this paper we show that, just as the first-order coherence can be understood as the interference of the amplitudes for two distinct paths, the higher order coherence may be understood as the interference of multiple amplitudes corresponding to multiple paths. To see this, we introduce the concept of nth-order "multiparticle wave amplitude." It turns out that the nth-order correlation function can be expressed as the square norm of some multiparticle wave amplitude for the closed system or as the sum of such square norms for the open system. We also examine, as a specific example, how an environment can destroy the second-order coherence by eliminating the interference between various multiple paths.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000177200800025
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/13489
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:
Zhou, DL,Zhang, P,Sun, CP. Understanding the destruction of nth-order quantum coherence in terms of multipath interference[J]. PHYSICAL REVIEW A,2002,66(1):-.
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