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arXiv 0903.2017cond-mat.quant-gascond-mat.str-el
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量子蒸馏:光晶格中强关联费米子低熵态的动力学产生

Quantum distillation: dynamical generation of low-entropy states of strongly correlated fermions in an optical lattice

F. Heidrich-Meisner, S. R. Manmana, M. Rigol, A. Muramatsu, A. E. Feiguin, E. Dagotto

摘要:

粒子之间的相关性会导致微妙的,有时甚至是违反直觉的现象。我们分析了一个这样的情况下,发生在突然膨胀的费米子在晶格中的初始状态时,有一个强大的混合物的双重占领。我们推广量子蒸馏的概念:在膨胀过程中,在存在强排斥相互作用的情况下,双分子聚集在一起,形成一个近乎理想的带绝缘体,它是亚稳态的,具有低熵。我们建议,这种效果可以用于冷却的目的,在实验中与两个组件的费米气体。

英文摘要:

Correlations between particles can lead to subtle and sometimes counterintuitive phenomena. We analyze one such case, occurring during the sudden expansion of fermions in a lattice when the initial state has a strong admixture of double occupancies. We promote the notion of quantum distillation: during the expansion, and in the presence of strongly repulsive interactions, doublons group together, forming a nearly ideal band insulator, which is metastable with a low entropy. We propose that this effect could be used for cooling purposes in experiments with two-component Fermi gases.

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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