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arXiv 2009.01491cond-mat.stat-mechcond-mat.quant-gas
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负specific heat预热化

Prethermalization with negative specific heat

Sayak Ray, James R. Anglin, Amichay Vardi

摘要:

研究了由具有负微正则比热的子系统组成的复合冷原子系统的非正则弛豫。由于出现了单一的绝热不变量,系统表现出远离可积性的预热化。Thirring不稳定性驱动的组成子系统的边缘,其允许的能谱,从而大大提高了之间的对比度的预热状态和长时间的热结果。

英文摘要:

We study non-canonical relaxation in a composite cold atoms system, consisting of subsystems that possess negative microcanonical specific heat. The system exhibits pre-thermalization far away from integrability due to the appearance of a single adiabatic invariant. The Thirring instability drives the constituent subsystems towards the edges of their allowed energy spectrum, thus greatly enhancing the contrast between the prethermal state and the long time thermal outcome.

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