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Interplay between coherent and incoherent decay processes in chaotic systems: The role of quantum interference
Physical Review E ( IF 2.4 ) Pub Date : 2021-05-03 , DOI: 10.1103/physreve.103.052201
Camilo Moreno , Juan-Diego Urbina

The population decay due to a small opening in an otherwise closed cavity supporting chaotic classical dynamics displays a quantum correction on top of the classical exponential form, a pure manifestation of quantum coherence that acquires a universal form and can be explained by path interference. Being coherent, such enhancement is prone to decoherence effects due to the coupling of the system to an external environment. We study this interplay between incoherent and coherent quantum corrections to decay by evaluating, within a Caldeira-Leggett scenario, off-diagonal contributions to the decoherence functional coming from pairs of correlated classical paths in the time regime where dissipative effects are neglected and decoherence does not affect the classical dynamics, but quantum interference must be accounted for. We find that the competing effects of interference and decoherence lead to a universal nonmonotonic form for the survival probability depending only on the coupling strength and macroscopic parameters of the cavity.

中文翻译:

混沌系统中相干和非相干衰减过程之间的相互作用:量子干涉的作用

由于在支持混沌经典动力学的否则封闭的腔体中的小开口而导致的种群衰减,在经典指数形式的顶部显示了量子校正,即量子相干的纯净表现形式,它获得了通用形式,并且可以用路径干涉来解释。由于是连贯的,由于系统与外部环境的耦合,这种增强易于产生退相干效应。我们通过在Caldeira-Leggett场景中评估在时间范围内对相关经典路径的消相干函数的非对角贡献来研究衰变的非相干和相干量子校正之间的相互作用,其中在时间体制中,耗散效应被忽略,而去相干没有影响经典动力学,但必须考虑量子干扰。
更新日期:2021-05-03
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