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- W2019903452 abstract "We use a generalized Gross-Pitaevskii equation for the condensate and a semi-classical kinetic equation for the noncondensate atoms to discuss the scissors mode in a trapped Bose-condensed gas at finite temperatures. Both equations include the effect of $C_{12}$ collisions between the condensate and noncondensate atoms. We solve the coupled moment equations describing oscillations of the quadrupole moments of the condensate and noncondensate components to find the collective mode frequencies and collisional damping rates as a function of temperature. Our calculations extend those of Gu'ery-Odelin and Stringari at T=0 and in the normal phase. They complement the numerical results of Jackson and Zaremba, although Landau damping is left out of our approach. Our results are also used to calculate the quadrupole response function, which is related to the moment of inertia. It is shown explicitly that the moment of inertia of a trapped Bose gas at finite temperatures involves a sum of an irrotational component from the condensate and a rotational component from the thermal cloud atoms." @default.
- W2019903452 created "2016-06-24" @default.
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- W2019903452 date "2002-02-11" @default.
- W2019903452 modified "2023-09-23" @default.
- W2019903452 title "Finite-temperature theory of the scissors mode in a Bose gas using the moment method" @default.
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- W2019903452 doi "https://doi.org/10.1103/physreva.65.033611" @default.
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