Density modulations in an elongated Bose-Einstein condensate released from a disordered potential

Abstract

We observe large density modulations in time-of-flight images of elongated Bose-Einstein condensates, initially confined in a harmonic trap and in the presence of weak disorder. The development of these modulations during the time-of-flight and their dependence with the disorder are investigated. We render an account of this effect using numerical and analytical calculations. We conclude that the observed large density modulations originate from the weak initial density modulations induced by the disorder, and not from initial phase fluctuations (thermal or quantum).

Published version; 4+ pages; 4 figures

References in corpus (9)

• Ultracold atomic gases in optical lattices: mimicking condensed matter physics and beyond
• Nature of the superconductor-insulator transition in disordered superconductors
• Anderson Localization of Expanding Bose-Einstein Condensates in Random Potentials
• Ultracold Bose Gases in 1D Disorder: From Lifshits Glass to Bose-Einstein Condensate
• Phase Coherence and Superfluid-Insulator Transition in a Disordered Bose-Einstein Condensate
• Anderson Localization of Bogolyubov Quasiparticles in Interacting Bose-Einstein Condensates
• Localization of Matter Waves in 2D-Disordered Optical Potentials
• Smoothing effect and delocalization of interacting Bose-Einstein condensates in random potentials
• Disorder-Induced Order in Two-Component Bose-Einstein Condensates

Cited by in corpus (11)

• Strongly interacting bosons in a disordered optical lattice
• Cold Bosons in Optical Lattices
• The quasi-periodic Bose-Hubbard model and localization in one-dimensional cold atomic gases
• Phase Coherence and Superfluid-Insulator Transition in a Disordered Bose-Einstein Condensate
• Disorder-induced trapping versus Anderson localization in Bose-Einstein condensates expanding in disordered potentials
• Stochastic Mean-Field Theory for the Disordered Bose-Hubbard Model
• Dipole Oscillations of a Bose-Einstein Condensate in Presence of Defects and Disorder
• Anderson localization of a weakly interacting one dimensional Bose gas
• Self-consistent study of Anderson localization in the Anderson-Hubbard model in two and three dimensions
• Caustic formation in expanding condensates of cold atoms
• Bose-Einstein condensates in disordered potentials