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arXiv quant-ph/9710061quant-ph
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运动原子与量子场相互作用中的相干性和涨落

Coherence and Fluctuations in the Interaction between Moving Atoms and a Quantum Field

B. L. Hu, Alpan Raval

摘要:

介观物理学涉及三个基本问题:量子相干性、涨落和关联。在这里,我们分析这些问题的原子光学,使用一个简化的模型,一个组件的原子(或检测器,这是一些内部自由度的粒子)在量子场中的任意轨迹移动。利用影响泛函理论,研究了光场对原子的自洽作用,以及原子与光场的相互作用。导出了原子集合的耦合朗之万方程,分析了原子的耗散动力学与量子场的关联和涨落的关系。这为分析原子-光场系统的相干性质提供了一个有用的理论框架。

英文摘要:

Mesoscopic physics deals with three fundamental issues: quantum coherence, fluctuations and correlations. Here we analyze these issues for atom optics, using a simplified model of an assembly of atoms (or detectors, which are particles with some internal degree of freedom) moving in arbitrary trajectories in a quantum field. Employing the influence functional formalism, we study the self-consistent effect of the field on the atoms, and their mutual interactions via coupling to the field. We derive the coupled Langevin equations for the atom assemblage and analyze the relation of dissipative dynamics of the atoms with the correlation and fluctuations of the quantum field. This provides a useful theoretical framework for analysing the coherent properties of atom-field systems.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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