Dynamic vortex unbinding following a quantum quench in bosonic mixtures

ORAL

Abstract

We study the many-body dynamics of a mixture of two hyperfine states of bosonic atoms in 2D, following a pi/2-pulse. Using both a numerical implementation of the Truncated Wigner approximation and an analytical approach, we find that a dynamic phase transition can be triggered, in which the system relaxes from a superfluid to a disordered state via vortex unbinding. This process can be dynamically suppressed, which creates a long-lived metastable supercritical state. We discuss the realization and detection of these effects.

–

Authors

  • Ludwig Mathey

    Joint Quantum Institute

  • Kenneth Guenter

    Laboratoire Kastler Brossel, ENS

  • Jean Dalibard

    Laboratoire Kastler Brossel, ENS

  • Anatoli Polkovnikov

    Boston University

  • Charles Clark

    Joint Quantum Institute, NIST, Joint Quantum Insititue, National Insitute of Standard and Technology, Joint Quantum Institute, National Institute of Standards and Technology and University of Maryland, JQI, NIST and the University of Maryland, National Institute of Standards and Technology, Joint Quantum Institute, NIST and the University of Maryland, Joint Quantum Institute, NIST and University of Maryland