Effects of Interactions and Temperature in Disordered Ultra-Cold Bose Gases

• 作者: Clemens Adolphs David A. W. Hutchinson Joseph Towers Konstantine V. Krutitsky Marie Piraud
• 来源期刊: 现代物理(英文)
• 学科: 医学
• 关键词: Ultra-Cold Atoms ANDERSON Localization Disorder Optical Lattice
• 年，卷（期）: 2014,（8）
• 页码范围: 661-672
• 页数: 12页
• 分类号: R73

摘要

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.