Physics – Condensed Matter – Disordered Systems and Neural Networks
Scientific paper
2010-05-20
Phys. Rev. A 81, 063635 (2010)
Physics
Condensed Matter
Disordered Systems and Neural Networks
Published in PRA, typos corrected
Scientific paper
10.1103/PhysRevA.81.063635
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 Lifshits glass is seen to be the limiting case for vanishing interactions.
Cetoli Alberto
Lundh Emil
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