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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, and E. Dagotto
Phys. Rev. A 80, 041603(R) – Published 16 October 2009
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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 case of strongly repulsive interactions, doublons group together, forming a nearly ideal band insulator, which is metastable with low entropy. We propose that this effect could be used for cooling purposes in experiments with two-component Fermi gases.

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  • Received 11 March 2009

DOI:https://doi.org/10.1103/PhysRevA.80.041603

©2009 American Physical Society

Authors & Affiliations

F. Heidrich-Meisner1, S. R. Manmana2, M. Rigol3, A. Muramatsu4, A. E. Feiguin5,6,7, and E. Dagotto8,9

  • 1Institut für Theoretische Physik C, RWTH Aachen University, 52056 Aachen, Germany
  • 2Institute of Theoretical Physics, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
  • 3Department of Physics, Georgetown University, Washington, D.C. 20057, USA
  • 4Institut für Theoretische Physik III, Universität Stuttgart, 70550 Stuttgart, Germany
  • 5Department of Physics and Astronomy, University of Wyoming, Laramie, Wyoming 82071, USA
  • 6Microsoft Project Q, University of California, Santa Barbara, California 93106, USA
  • 7Condensed Matter Theory Center, University of Maryland, College Park, Maryland 20742, USA
  • 8Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
  • 9Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA

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Issue

Vol. 80, Iss. 4 — October 2009

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