Dark soliton dynamics in Bose-Einstein condensates at finite temperature

Abstract

The dynamics of a dark soliton in an elongated Bose-Einstein condensate at finite temperatures is studied using numerical simulations. We find that in the presence of harmonic confinement the soliton may oscillate even at finite temperatures, but with an amplitude that increases with time, indicating the decay of the soliton. The timescale of this decay decreases both with increasing temperature and with increasing initial soliton velocity. Simulations performed for the experiment of S. Burger et al., Phys. Rev. Lett. 83, 5198 (1999), reveal excellent agreement with the observed soliton decay, confirming the crucial role of the thermal cloud in soliton dynamics.

4 pages, 4 figures

References in corpus (1)

• Formation of bright matter-wave solitons during the collapse of Bose-Einstein condensates

Cited by in corpus (17)

• Oscillations and interactions of dark and dark-bright solitons in Bose-Einstein condensates
• Finite Temperature Models of Bose-Einstein Condensation
• Dissipative dynamics of superfluid vortices at non-zero temperatures
• Observable Vortex Properties in Finite Temperature Bose Gases
• Stochastic Projected Gross-Pitaevskii equation for spinor and multi-component condensates
• Second-order, number-conserving description of non-equilibrium dynamics in finite-temperature Bose-Einstein condensates
• Matter-wave dark solitons in box-like traps
• Evaporative cooling of cold atoms at surfaces
• Collapse and revival of the monopole mode of a degenerate Bose gas in an isotropic harmonic trap
• Kinetic Model of Trapped Finite Temperature Binary Condensates
• Non-equilibrium Atomic Condensates and Mixtures: Collective Modes, Condensate Growth and Thermalization
• Dissipation in a Finite Temperature Atomic Josephson Junction
• Using dark solitons from a Bose-Einstein condensate necklace to imprint soliton states in the spectral memory of a free boson gas
• Stochastic longevity of a dark soliton in a finite-temperature Bose-Einstein condensate
• Characterizing far from equilibrium states of the one-dimensional nonlinear Schr{ö}dinger equation
• Observing phase jumps of solitons in Bose-Einstein condensates
• Variational Approach to the Snake Instability of a Bose-Einstein Condensate Soliton