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Nonequilibrium Josephson oscillations in Bose-Einstein condensates without dissipation

Authors
  • Martinez, Mauricio Trujillo
  • Posazhennikova, Anna
  • Kroha, Johann
Type
Published Article
Publication Date
Sep 15, 2009
Submission Date
Mar 31, 2009
Identifiers
DOI: 10.1103/PhysRevLett.103.105302
Source
arXiv
License
Yellow
External links

Abstract

We perform a detailed field theoretical study of nonequilibrium Josephson oscillations between interacting Bose-Einstein condensates confined in a finite-size double-well trap. We find that the Josephson junction can sustain multiple undamped Josephson oscillations up to a characteristic time scale $\tau_c$ without quasipartcles being excited in the system. This may explain recent related experiments. At larger times the dynamics of the junction is governed by fast Rabi oscillations between the descrete quasiparticle levels. We predict that a selftrapped BEC state will be destroyed by these Rabi oscillations.

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