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Dynamics of the inhomogeneous Dicke model for a single-boson mode coupled to a bath of nonidentical spin-1/2 systems

beimu1009 添加于 2009-8-13 17:38 | 1555 次阅读 | 0 个评论

作者
Tsyplyatyev O, Loss D
摘要
We study the time dynamics of a single boson coupled to a bath of two-level systems (spins 1/2) with different excitation energies, described by an inhomogeneous Dicke model. Analyzing the time-dependent Schrödinger equation exactly, we find that at resonance the boson decays in time to an oscillatory state with a finite amplitude characterized by a single Rabi frequency if the inhomogeneity is below a certain threshold. In the limit of small inhomogeneity, the decay is suppressed and exhibits a complex (mainly Gaussian-like) behavior, whereas the decay is complete and of exponential form in the opposite limit. For intermediate inhomogeneity, the boson decay is partial and governed by a combination of exponential and power laws. ©2009 The American Physical Society
详细资料
- 文献种类: Journal Article
- 期刊名称: Physical Review A
- 期刊缩写: Phys. Rev. A
- 期卷页: 2009年第80卷第2期
- ISBN: 1050-2947
学科领域自然科学 » 物理学
标签

Dicke model spin-1/2 system
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