Nonlinear Transport of Bose-Einstein Condensates Through Waveguides with Disorder
arXiv:cond-mat/0509446 · doi:10.1103/PhysRevA.72.063621
Abstract
We study the coherent flow of a guided Bose-Einstein condensate incident over a disordered region of length L. We introduce a model of disordered potential that originates from magnetic fluctuations inherent to microfabricated guides. This model allows for analytical and numerical studies of realistic transport experiments. The repulsive interaction among the condensate atoms in the beam induces different transport regimes. Below some critical interaction (or for sufficiently small L) a stationary flow is observed. In this regime, the transmission decreases exponentially with L. For strong interaction (or large L), the system displays a transition towards a time dependent flow with an algebraic decay of the time averaged transmission.
15 pages, 9 figures
References in corpus (26)
- Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
- Atomic Scattering in Presence of an External Confinement and a Gas of Impenetrable Bosons
- Formation and Propagation of Matter Wave Soliton Trains
- Formation of a Matter-Wave Bright Soliton
- Dark Solitons in Bose-Einstein Condensates
- Experimental Study of the BEC-BCS Crossover Region in Lithium 6
- Observation of Quantum Shock Waves Created with Ultra Compressed Slow Light Pulses in a Bose-Einstein Condensate
- A Bose-Einstein condensate in a random potential
- Atom Chips
- Bose-Einstein Condensation in a Surface Micro Trap
- Observation of dynamical instability for a Bose-Einstein condensate in a moving 1D optical lattice
- Suppression of Transport of an Interacting Elongated Bose-Einstein Condensate in a Random Potential
- Collective oscillations of a 1D trapped Bose gas
- Propagation of Bose-Einstein condensates in a magnetic waveguide
- Solitary waves in clouds of Bose-Einstein condensed atoms
- Bose beams: coherent propagation through a guide
- Surface Effects in Magnetic Microtraps
- The role of wire imperfections in micro magnetic traps for atoms
- Nonlinear Resonant Transport of Bose Einstein Condensates
- Disordered Bose-Einstein Condensates in Quasi One-Dimensional Magnetic Microtraps
- Atom chips in the real world: the effects of wire corrugation
- Anomalous Longitudinal Magnetic Field near the Surface of Copper Conductors
- A quantum point contact for neutral atoms
- Bloch oscillations of Bose-Einstein condensates: Breakdown and revival
- Solitonic transmission of Bose-Einstein matter waves
- Microelectromagnets for Trapping and Manipulating Ultracold Atomic Quantum Gases