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Understanding the destruction of nth-order quantum coherence in terms of multipath interference
Zhou, DL; Zhang, P; Sun, CP; Zhou, DL , Tsing Hua Univ, Ctr Adv Study, Beijing 100084, Peoples R China.
2002
发表期刊PHYSICAL REVIEW A
ISSN1050-2947
卷号66期号:1页码:-
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.
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
关键词Decoherence Computers
学科领域Physics
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收录类别SCI
WOS记录号WOS:000177200800025
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被引频次:1[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/311006/13489
专题1978-2010年知识产出
通讯作者Zhou, DL , Tsing Hua Univ, Ctr Adv Study, Beijing 100084, Peoples R China.
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Zhou, DL,Zhang, P,Sun, CP,et al. Understanding the destruction of nth-order quantum coherence in terms of multipath interference[J]. PHYSICAL REVIEW A,2002,66(1):-.
APA Zhou, DL,Zhang, P,Sun, CP,&Zhou, DL , Tsing Hua Univ, Ctr Adv Study, Beijing 100084, Peoples R China..(2002).Understanding the destruction of nth-order quantum coherence in terms of multipath interference.PHYSICAL REVIEW A,66(1),-.
MLA Zhou, DL,et al."Understanding the destruction of nth-order quantum coherence in terms of multipath interference".PHYSICAL REVIEW A 66.1(2002):-.
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