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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
It is part of: Physical Review A, 2003, vol. 67, núm. 5, p. 053607.
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ISSN: 1050-2947
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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