Energy drag and shear viscosity in interacting quantum systems

ORAL

Abstract

There has recently been a wave of interest in the hydrodynamical behavior of quantum many-body systems. Using `Coulomb drag’ physics as a guide, we discuss analogues of shear viscosity in quantum systems on discrete lattices. We argue that, although particle-hole symmetric materials have zero Coulomb drag, they nevertheless show a thermal equivalent in the form of drag between energy currents. Using a combination of perturbation theory and techniques from integrability, we give analytical predictions for this effect in coupled one-dimensional wires and compare them to DMRG studies on the Hubbard model. We comment on the generalization of these results to higher dimensional systems.

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Presenters

  • William Berdanier

    University of California, Berkeley

Authors

  • William Berdanier

    University of California, Berkeley

  • Thomas Scaffidi

    University of California, Berkeley, Department of Physics, University of California, Berkeley, California 94720, USA

  • Christoph Karrasch

    Freie Universitaet Berlin, Physics, Freie Universität Berlin, Dahlem Center for Complex Quantum Systems and Fachbereich Physik, Freie Universität Berlin

  • Joel Moore

    University of California, Berkeley, Department of Physics, University of California, Berkeley, California 94720, USA, University of California, Berkeley and Lawrence Berkeley National Laboratory, Physics, University of California, Berkeley, University of California, Berkeley, and Lawrence Berkeley National Laboratory