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arXiv 1004.0218cond-mat.quant-gascond-mat.other
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玻色-爱因斯坦凝聚体与表面的相互作用:微扰S-矩阵方法

Interaction of a Bose-Einstein condensate with a surface: perturbative S-matrix approach

Jürgen Schiefele, Carsten Henkel

摘要:

通过凝聚态原子与电磁场的耦合,导出了凝聚态玻色子气体与平面的Casimir-Polder集体相互作用的表达式。基于电磁自能的图解展开,发展了一种系统的微扰理论。在第一阶中,相互作用能的结果与凝聚态中的原子数成正比。在这个顺序下,原子间的相互作用和反冲效应通过原子跃迁能量的移动导致了与单原子理论相比的修正。我们还讨论了空间离域的凝聚模式的影响。

英文摘要:

We derive an expression for the collective Casimir-Polder interaction of a trapped gas of condensed bosons with a plane surface through the coupling of the condensate atoms with the electromagnetic field. A systematic perturbation theory is developed based on a diagrammatic expansion of the electromagnetic self-energy. In the leading order, the result for the interaction-energy is proportional to the number of atoms in the condensate mode. At this order, atom-atom interactions and recoil effects lead to corrections compared to the single-atom theory, through shifts of the atomic transition energies. We also discuss the impact of the spatial delocalization of the condensate mode.

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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