Session V45: Rotation and Artificial Gauge Fields: Vortices and Quantum Hall Physics

8:00 AM–10:48 AM, Thursday, March 24, 2011
Room: A310

Sponsoring Unit: DAMOP
Chair: Hui Zhai, Tsinghua University

Abstract ID: BAPS.2011.MAR.V45.8

Abstract: V45.00008 : Dynamic vortex unbinding following a quantum quench in bosonic mixtures

9:24 AM–9:36 AM

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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)

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.

To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2011.MAR.V45.8