Correlations and superfluidity of a one-dimensional Bose gas in a quasiperiodic potential
2010 (English)In: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 81, no 6, 063635-063642 p.Article in journal (Refereed) Published
We consider the correlations and superfluid properties of a Bose gas in an external potential. Using a Bogoliubov scheme, we obtain expressions for the correlation function and the superfluid density in an arbitrary external potential. These expressions are applied to a one-dimensional system at zero temperature subject to a quasiperiodic modulation. The critical parameters for the Bose glass transition are obtained using two different criteria and the results are compared. The Lifshitz glass is seen to be the limiting case for vanishing interactions.
Place, publisher, year, edition, pages
American Physical Society , 2010. Vol. 81, no 6, 063635-063642 p.
IdentifiersURN: urn:nbn:se:umu:diva-38894DOI: 10.1103/PhysRevA.81.063635ISI: 000279262800001OAI: oai:DiVA.org:umu-38894DiVA: diva2:384320