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arXiv · 0903.2017

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
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Abstract

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.

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F. Heidrich-Meisner, S. R. Manmana, M. Rigol, A. Muramatsu, A. E. Feiguin, E. Dagotto. 2009-10-19. Quantum distillation: dynamical generation of low-entropy states of strongly correlated fermions in an optical lattice. https://doi.org/10.1103/physreva.80.041603

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