Disordered Bosons: Condensate and Excitations
Condensed Matter
2009-10-22 v1
Abstract
The disordered Bose Hubbard model is studied numerically within the Bogoliubov approximation. First, the spatially varying condensate wavefunction in the presence of disorder is found by solving a nonlinear Schrodinger equation. Using the Bogoliubov approximation to find the excitations above this condensate, we calculate the condensate fraction, superfluid density, and density of states for a two-dimensional disordered system. These results are compared with experiments done with adsorbed in porous media.
Cite
@article{arxiv.cond-mat/9307039,
title = {Disordered Bosons: Condensate and Excitations},
author = {K. G. Singh and D. S. Rokhsar},
journal= {arXiv preprint arXiv:cond-mat/9307039},
year = {2009}
}
Comments
RevTeX, 26 pages and 10 postscript figures appended (Figure 9 has three separate plots, so 12 postcript files altogether)