Propagation of collective pair excitations in disordered Bose superfluids
| Autor: | Samuel Lellouch, Laurent Sanchez-Palencia, Lih-King Lim |
|---|---|
| Přispěvatelé: | Laboratoire Charles Fabry / Optique atomique, Laboratoire Charles Fabry (LCF), Université Paris-Sud - Paris 11 (UP11)-Institut d'Optique Graduate School (IOGS)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut d'Optique Graduate School (IOGS)-Centre National de la Recherche Scientifique (CNRS), LCF-OA, European Project: 256294,EC:FP7:ERC,ERC-2010-StG_20091028,ALOGLADIS(2011) |
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Physics
Condensed Matter::Quantum Gases 6785-d Condensed matter physics [PHYS.COND.GAS]Physics [physics]/Condensed Matter [cond-mat]/Quantum Gases [cond-mat.quant-gas] Scattering Diagram FOS: Physical sciences 0560Gg 01 natural sciences Condensed Matter::Disordered Systems and Neural Networks 0570Ln Atomic and Molecular Physics and Optics Spectral line 010305 fluids & plasmas Superfluidity Quantum transport 0530Jp Ultracold atom Quantum Gases (cond-mat.quant-gas) 0103 physical sciences Quasiparticle Condensed Matter - Quantum Gases 010306 general physics |
| Zdroj: | Physical Review A Physical Review A, American Physical Society, 2015, 92, pp.043611 Physical Review A : Atomic, molecular, and optical physics [1990-2015] Physical Review A : Atomic, molecular, and optical physics [1990-2015], 2015, 92, pp.043611 |
| ISSN: | 1050-2947 1094-1622 |
| Popis: | We study the effect of disorder on the propagation of collective excitations in a disordered Bose superfluid. We incorporate local density depletion induced by strong disorder at the meanfield level, and formulate the transport of the excitations in terms of a screened scattering problem. We show that the competition of disorder, screening, and density depletion induces a strongly non-monotonic energy dependence of the disorder parameter. In three dimensions, it results in a rich localization diagram with four different classes of mobility spectra, characterized by either no or up to three mobility edges. Implications on experiments with disordered ultracold atoms are discussed. Comment: 9 pages, 5 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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