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Low Energy Excitation Spectra of Trapped Bose Condensates

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You L., Hoston W., Lewenstein M., Marinescu M.
Acta Physica Polonica A
|
1998
|
vol. 93
|
issue 1
211-235
EN
We discuss our numerical studies of the low energy excitations of trapped Bose condensates using a Bogoliubov-Hartree treatment. In the zero temperature limit, the lowest few excitation frequencies calculated within the Bogoliubov approximation agree well with the experimental data. Finite temperature results obtained using the Popov approximation display qualitative differences from the experimental data close to the critical temperature region. Details of our numerical approach are presented and comparison with other results is discussed.
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