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Phys. Rev. A 77, 041604(R) (2008) [4 pages]

Correlations in an expanding gas of hard-core bosons

D. M. Gangardt1 and M. Pustilnik2
1School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
2School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332, USA

Rapid Received 14 September 2007; revised 1 November 2007; published 10 April 2008

We consider a longitudinal expansion of a one-dimensional gas of hard-core bosons suddenly released from a trap. We show that the broken translational invariance in the initial state of the system is encoded in correlations between the bosonic occupation numbers in the momentum space. The correlations are protected by the integrability and exhibit no relaxation during the expansion.

©2008 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevA.77.041604
DOI: 10.1103/PhysRevA.77.041604
PACS: 03.75.Kk; 05.30.Jp
  • 03.75.Kk
    Dynamic properties of Bose-Einstein condensates
  • 05.30.Jp
    Boson systems (quantum statistical mechanics)
  • YEAR: 2008
KEYWORDS: boson systems, Schrodinger equation

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