Title
Superfluid to Bose-Glass transition in a 1D weakly interacting Bose gas Superfluid to Bose-Glass transition in a 1D weakly interacting Bose gas
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
New York, N.Y. ,
Subject
Physics
Source (journal)
Physical review letters. - New York, N.Y.
Volume/pages
103(2009) :3 , 4 p.
ISSN
0031-9007
Article Reference
030403
Carrier
E-only publicatie
Target language
English (eng)
Full text (Publishers DOI)
Abstract
We study the one-dimensional Bose gas in spatially correlated disorder at zero temperature, using an extended density-phase Bogoliubov method. We analyze, in particular, the decay of the one-body density matrix and the behavior of the Bogoliubov excitations across the phase boundary. We observe that the transition to the Bose-glass phase is marked by a power-law divergence of the density of states at low energy. A measure of the localization length displays a power-law energy dependence in both regions, with the exponent equal to -1 at the boundary. We draw the phase diagram of the superfluid-insulator transition in the limit of small interaction strength.
Full text (open access)
https://repository.uantwerpen.be/docman/irua/abf56d/9bd3b94e.pdf