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Landau Damping of Collective Modes in a Disc-Shaped Bose--Einstein Condensate |
| MA Xiao-Dong 1,2;MA Yong-Li3;HUANG Guo-Xiang1 |
| 1Department of Physics, East China Normal University, Shanghai 2000622Department of Physics, Xinjiang Normal University, Urumchi 8300543Department of Physics, Fudan University, Shanghai 200433 |
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| Cite this article: |
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MA Xiao-Dong, MA Yong-Li, HUANG Guo-Xiang 2007 Chin. Phys. Lett. 24 616-619 |
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Abstract We investigate the Landau damping of collective modes in an anisotropic Bose--Einstein condensate (BEC). Based on divergence-free analytical solutions for the ground state wavefunction of the condensate and all eigenvalues and eigenfunctions for thermal excited quasiparticles, we make a detailed analytical calculation on coupling matrix elements. We evaluate the Landau damping of a quadrupole collective mode in the BEC with a disc-shaped trap and discuss its dependence on temperature and particle number of the system.
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03.75.Kk
05.30.Jp
67.40.Db
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Received: 19 September 2006
Published: 08 February 2007
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| PACS: |
03.75.Kk
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(Dynamic properties of condensates; collective and hydrodynamic excitations, superfluid flow)
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05.30.Jp
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(Boson systems)
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67.40.Db
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