Effect of quasiparticle renormalization on the localization of the excitations of a one-dimensional Bose-Einstein condensate in a random potential
Makaleler > Tam Makale · 2011
Yazarlar: İbrahim AVGIN, D. L. Huber
PHYSICA B-CONDENSED MATTER, SCI Expanded İndekslerine Giren Dergi, Uluslararası, 2011, cilt 406, ss 1906-1908
DOI: 10.1016/j.physb.2011.02.052
Özet
We investigate the effects of renormalization on the localization of the quasiparticle excitations of one-dimensional Bose-Einstein condensate in a random potential. Starting with a set of linearized equations of motion for the phases of superfluid grains coupled by Josephson interactions, we use mode-counting techniques to calculate the inverse localization length for large (10(8)) arrays. Employing distributions for the interaction parameters that are the same as the initial (pre-renormalization) distributions used by Gurarie et al. (Phys. Rev. Lett. 101 (2008) 170407), we compare the initial-interaction results for the localization length with those obtained using renormalization group techniques. (C) 2011 Elsevier B.V. All rights reserved.