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arXiv 0705.4164cond-mat.other
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超冷玻色气体中具有宏观声子数的凝聚态的形成

Formation of a condensed state with macroscopic number of phonons in ultracold Bose gases

Yu. Kagan, L. A. Manakova

摘要:

本文提出了一种在凝聚原子气体中形成一种新的宏观声子数定态的机制。这种机制是基于产生纵向声子作为一个结果的参数共振所造成的横向陷阱频率的永久调制在一个细长的陷阱。声子-声子相互作用决定了在参量放大的能量区间内,系统的自洽演化是由各个能级的宏观布居完成的。这个水平被证明是移动到这个区间的边缘。所有其他级别都以零人口结束进化。

英文摘要:

A mechanism for the formation of a new type of stationary state with macroscopical number of phonons in condensed atomic gases is proposed. This mechanism is based on generating longitudinal phonons as a result of parametric resonance caused by a permanent modulation of the transverse trap frequency in an elongated trap. The phonon-phonon interaction predetermines the self-consistent evolution which is completed with macroscopic population of one from all levels within the energy interval of parametric amplification. This level proves to be shifted to the edge of this interval. All other levels end the evolution with zero population.

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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