Precession of Vortices in Dilute Bose-Einstein Condensates at Finite Temperature
arXiv:0910.2074 · doi:10.1103/PhysRevA.80.035603
Abstract
We demonstrate that the precessional frequencies of vortices in Bose Einstein condensates (BECs) are determined by a conservation law, and not by the lowest lying excitation energy mode. We determine the precessional frequency for a single off-axis vortex and vortex lattices in BECs using the continuity equation, and solve this self-consistently with the time-independent Hartree-Fock-Bogoliubov (HFB) equations in the rotating frame. We find agreement with zero temperature calculations (Bogoliubov approximation), and a smooth variation in the precession frequency as the temperature is increased. Time-dependent solutions confirm the validity of these predictions.
arXiv comment5 pages, 2 figures
References in corpus (20)
- Vortex formation in a stirred Bose-Einstein condensate
- Vortices in a Bose-Einstein Condensate
- Conserving and Gapless Approximations for an Inhomogeneous Bose Gas at Finite Temperatures
- Vortex Nucleation in a Stirred Bose-Einstein Condensate
- Topological vortex formation in a Bose-Einstein condensate
- Observation of vortex phase singularities in Bose-Einstein condensates
- Vortex precession in Bose-Einstein condensates: observations with filled and empty cores
- Vortex stability of interacting Bose-Einstein condensates confined in anisotropic harmonic traps
- Excitation spectroscopy of vortex states in dilute Bose-condensed gases
- A Gapless Theory of Bose-Einstein Condensation in Dilute Gases at Finite Temperature
- Anomalous modes drive vortex dynamics in confined Bose-Einstein condensates
- Normal Modes of a Vortex in a Trapped Bose-Einstein Condensate
- Interferometric detection of a single vortex in a dilute Bose-Einstein condensate
- Vortex stabilization in Bose-Einstein condensate of alkali atom gas
- Excited states of a dilute Bose-Einstein condensate in a harmonic trap
- Incoherent matter-wave solitons
- Finite temperature theory of the trapped two dimensional Bose gas
- Structure and Stability of Vortices in Dilute Bose-Einstein Condensates at Ultralow Temperatures
- On the effect of the thermal gas component to the stability of vortices in trapped Bose-Einstein condensates
- Precessional motion of a vortex in a finite-temperature Bose-Einstein condensate
Cited by in corpus (5)
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- Thermal friction on quantum vortices in a Bose-Einstein condensate
- Observable Vortex Properties in Finite Temperature Bose Gases
- Collective modes and generation of a new vortex in a trapped Bose gas at finite temperature
- Dynamical Hartree-Fock-Bogoliubov Theory of Vortices in Bose-Einstein Condensates at Finite Temperature