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Phase diagrams of 2D and 3D disordered Bose gases in the local density approximation

Thomas Bourdel 1 
1 Laboratoire Charles Fabry / Optique atomique
LCF - Laboratoire Charles Fabry
Abstract : We study the superfluid transitions in bidimensional (2D) and tridimensional (3D) disordered and interacting Bose gases. We work in the limit of long-range correlated disorder such that it can be treated in the local density approximation. We present the superfluid transition curves both in the disorder-temperature plane well as in the disorder-entropy plane in 2D and 3D Bose gases. Surprisingly, we find that a small amount of disorder is always favorable to the apparition of a superfluid. Our results offer a quantitative comparison with recent experiments in 2D disordered ultra-cold gases, for which no exact theory exists.
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Submitted on : Wednesday, October 3, 2012 - 2:29:34 PM
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Thomas Bourdel. Phase diagrams of 2D and 3D disordered Bose gases in the local density approximation. Physical Review A, American Physical Society, 2012, 86 (6), pp.063626. ⟨10.1103/PhysRevA.86.063626⟩. ⟨hal-00738114⟩



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