Finite-temperature simulations of the scissors mode in Bose-Einstein condensed gases

Abstract

The dynamics of a trapped Bose-condensed gas at finite temperatures is described by a generalized Gross-Pitaevskii equation for the condensate order parameter and a semi-classical kinetic equation for the thermal cloud, solved using $N$-body simulations. The two components are coupled by mean fields as well as collisional processes that transfer atoms between the two. We use this scheme to investigate scissors modes in anisotropic traps as a function of temperature. Frequency shifts and damping rates of the condensate mode are extracted, and are found to be in good agreement with recent experiments.

arXiv comment4 pages, 3 figures

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• Principal problems in Bose-Einstein condensation of dilute gases
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• Phase Separation and Dynamics of two-component Bose-Einstein condensates
• Stochastic Dynamics of a Trapped Bose-Einstein Condensate
• Finite temperature vortex dynamics in Bose Einstein condensates
• Modelling Bose-condensed gases at finite temperatures with $N$-body simulations
• Quadrupole collective modes in trapped finite-temperature Bose-Einstein condensates
• Unpinning triggers for superfluid vortex avalanches
• A number-conserving approach to a minimal self-consistent treatment of condensate and non-condensate dynamics in a degenerate Bose gas
• The Stochastic Gross-Pitaevskii Equation and some Applications
• Thermodynamics of an interacting trapped Bose-Einstein gas in the classical field approximation
• A comparison between microscopic methods for finite temperature Bose gases
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• Dynamical instability of a condensate induced by a rotating thermal gas
• Observable Vortex Properties in Finite Temperature Bose Gases
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• Landau damping in trapped Bose-condensed gases
• Second-order, number-conserving description of non-equilibrium dynamics in finite-temperature Bose-Einstein condensates
• Ultracold gases far from equilibrium
• Probing superfluidity in a quasi two-dimensional Bose gas through its local dynamics
• PGPE theory of finite temperature collective modes for a trapped Bose gas
• Nonequilibrium dynamics of an ultracold dipolar gas
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• The non-classical scissors mode of a vortex lattice in a Bose-Einstein condensate
• Reservoir interactions of a vortex in a trapped 3D Bose-Einstein condensate
• Nonlinear coupling between scissors modes of a Bose-Einstein condensate
• Evaporative cooling of cold atoms at surfaces
• Finite temperature theory of the scissors mode in a Bose gas using the moment method
• 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
• Enhanced oscillation lifetime of a Bose-Einstein condensate in the 3D/1D crossover
• Dissipation in a Finite Temperature Atomic Josephson Junction
• The Moment of Inertia and the Scissors Mode of a Bose-condensed Gas
• Explicit finite-difference and direct-simulation-MonteCarlo method for the dynamics of mixed Bose-condensate and cold-atom clouds
• Collisionless dynamics of the condensate predicted in the random phase approximation
• A Non-Equilibrium Kinetic Theory for Trapped Binary Condensates
• Hydrodynamic collective modes for cold trapped gases
• Thermal fluctuations of vortex clusters in quasi-two-dimensional Bose-Einstein condensate
• Beyond Gross-Pitaevskii Mean Field Theory
• The nonlinear damping of Bose-Einstein condensate oscillations at ultra-low temperatures
• Nonlinear Mixing of Collective Modes in Harmonically Trapped Bose-Einstein Condensates