Propagation of collective pair excitations in disordered Bose superfluids
arXiv:1504.06086 · doi:10.1103/PhysRevA.92.043611
Abstract
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.
9 pages, 5 figures
References in corpus (18)
- Anderson Transitions
- Localization of interacting fermions at high temperature
- Spreading of correlations and entanglement after a quench in the one-dimensional Bose-Hubbard model
- Anderson localization in Bose-Einstein condensates
- Ultracold Bose Gases in 1D Disorder: From Lifshits Glass to Bose-Einstein Condensate
- Anderson Localization of Bogolyubov Quasiparticles in Interacting Bose-Einstein Condensates
- Bose-Einstein-condensed systems in random potentials
- Mobility edge for cold atoms in laser speckle potentials
- Smoothing effect and delocalization of interacting Bose-Einstein condensates in random potentials
- Bogoliubov Excitations of Disordered Bose-Einstein Condensates
- Localization of Bogoliubov quasiparticles in interacting Bose gases with correlated disorder
- Bose-Einstein-condensed gases in arbitrarily strong random potentials
- Localization transition in weakly-interacting Bose superfluids in one-dimensional quasiperdiodic lattices
- Superfluid to Bose-glass transition in a 1D weakly interacting Bose gas
- Localized states and interaction induced delocalization in Bose gases with quenched disorder
- Anderson Localization of Matter Waves in 3D Anisotropic Disordered Potentials
- Anisotropic scattering of Bogoliubov excitations
- Transport of Hubbard-Band Quasiparticles in Disordered Optical Lattices
Cited by in corpus (13)
- Lieb-Liniger Bosons in a Shallow Quasiperiodic Potential: Bose Glass Phase and Fractal Mott Lobes
- Dynamics of the mean-field interacting quantum kicked rotor
- Super-exponential diffusion in nonlinear non-Hermitian systems
- Quench Spectroscopy of a Disordered Quantum System
- Bose-Bose mixtures in a weak-disorder potential: Fluctuations and superfluidity
- Effects of the Lee-Huang-Yang quantum corrections on a disordered dipolar Bose gas
- Finding the phase diagram of strongly-correlated disordered bosons using quantum quenches
- Localization of weakly interacting bosons in two dimensions: disorder vs lattice geometry effects
- Strongly interacting bosons in 1D disordered lattice: phase coherence of distorted Mott phases
- Effects of weak disorder on two-dimensional bilayered dipolar Bose-Einstein condensates
- Full distribution of the superfluid fraction and extreme value statistics in a one dimensional disordered Bose gas
- Non-linear response of interacting bosons in a quasiperiodic potential
- Mobility edges and fractal states in quasiperiodic Gross-Pitaevskii chains