Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2003-05-12
Physics
Condensed Matter
Statistical Mechanics
18 pages, 13 figures, submitted to the New Journal of Physics focus issue on Quantum Gases
Scientific paper
10.1088/1367-2630/5/1/388
We study Landau damping in dilute Bose-Einstein condensed gases in both spherical and prolate ellipsoidal harmonic traps. We solve the Bogoliubov equations for the mode spectrum in both of these cases, and calculate the damping by summing over transitions between excited quasiparticle states. The results for the spherical case are compared to those obtained in the Hartree-Fock approximation, where the excitations take on a single-particle character, and excellent agreement between the two approaches is found. We have also taken the semiclassical limit of the Hartree-Fock approximation and obtain a novel expression for the Landau damping rate involving the time dependent self-diffusion function of the thermal cloud. As a final approach, we study the decay of a condensate mode by making use of dynamical simulations in which both the condensate and thermal cloud are evolved explicitly as a function of time. A detailed comparison of all these methods over a wide range of sample sizes and trap geometries is presented.
Jackson Bailey
Zaremba E.
No associations
LandOfFree
Landau damping in trapped Bose-condensed gases does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Landau damping in trapped Bose-condensed gases, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Landau damping in trapped Bose-condensed gases will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-202194