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Title: | Landau damping of transverse quadrupole oscillations of an elongated Bose-Einstein condensate |
Author: | Guilleumas, Montserrat Pitaevskii, L. P. (Lev Petrovich) |
Keywords: | Matèria condensada Estadística quàntica Mecànica estadística Condensació de Bose-Einstein Pertorbació (Dinàmica quàntica) Condensed matter Quantum statistics Statistical mechanics Bose-Einstein condensation Perturbation (Quantum dynamics) |
Issue Date: | 2003 |
Publisher: | The American Physical Society |
Abstract: | We have studied the interaction between the low-lying transverse collective oscillations and the thermal excitations of an elongated Bose-Einstein condensate by means of perturbation theory. We consider a cylindrical trapped condensate and calculate the transverse elementary excitations at zero temperature by solving the linearized Gross-Pitaevskii equations in two dimensions (2D). We use them to calculate the matrix elements between the thermal excited states and the quasi-2D collective modes. The Landau damping of transverse collective modes is studied as a function of temperature. At low temperatures, the corresponding damping rate is in agreement with the experimental data for the decay of the transverse quadrupole mode, but it is too small to explain the observed slow decay of the transverse breathing mode. The reason for this discrepancy is discussed. |
Note: | Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevA.67.053607 |
It is part of: | Physical Review A, 2003, vol. 67, núm. 5, p. 053607. |
URI: | http://hdl.handle.net/2445/9582 |
Related resource: | http://dx.doi.org/10.1103/PhysRevA.67.053607 |
ISSN: | 1050-2947 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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