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

ORAL

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.

–

Authors

  • Salvatore R. Manmana

    Institute of Theoretical Physics, EPF Lausanne, CH-1015 Lausanne, Switzerland, ITP, EPF Lausanne, Switzerland

  • Fabian Heidrich-Meisner

    Department Physik, LMU Munich, Germany

  • Marcos Rigol

    Georgetown University, Department of Physics, Georgetown University, Washington, D.C. 20057, USA, Georegetown University

  • Alejandro Muramatsu

    Institut f\"ur Theoretische Physik III, Universit\"at Stuttgart, Institute for Theoretical Physics III, University of Stuttgart, Germany

  • Adrian Feiguin

    Department of Physics and Astronomy, University of Wyoming, Laramie, Wyoming 82071, USA, University of Wyoming

  • Elbio Dagotto

    Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA, University of Tennessee, Knoxville and Oak Ridge National Lab, University of Tennessee and ORNL, University of Tennessee, Oak Ridge National Laboratory