TITLE:
Effects of Interactions and Temperature in Disordered Ultra-Cold Bose Gases
AUTHORS:
Clemens Adolphs, Joseph Towers, Marie Piraud, Konstantine V. Krutitsky, David A. W. Hutchinson
KEYWORDS:
Ultra-Cold Atoms, Anderson Localization, Disorder, Optical Lattice
JOURNAL NAME:
Journal of Modern Physics,
Vol.5 No.8,
May
29,
2014
ABSTRACT: We simulate
ultra-cold interacting bosons in quasi-one-dimensional, incommensurate optical
lattices. In the tight-binding limit, these lattices have pseudo-random on-site
energies and thus can potentially lead to Anderson localization. We use the
Hartree-Fock-Bogoliubov formalism in the Bose-Hubbard model to explore the
parameter regimes that lead to exponential localization of the ground state in
a 3-colour optical lattice and investigate the role of repulsive interactions,
harmonic confinement and finite temperature.