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

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

2009-03-11

arxiv.org/abs/0903.2017v2

Phys. Rev. A 80, 041603(R) (2009)

Physics

Condensed Matter

Quantum Gases

Final version as published, minor revisions, more discussion on the cooling proposal, includes auxiliary material (EPAPS), 7 p

Scientific paper

10.1103/PhysRevA.80.041603

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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