Collective Excitations of a Two-Component Bose Condensate at Finite Temperature

Details Collective Excitations of a Two-Component Bose Condensate at Finite Temperature Collective Excitations of a Two-Component Bose Condensate at Finite Temperature

2006-07-19

arxiv.org/abs/cond-mat/0607503v1

Physics

Condensed Matter

Other Condensed Matter

4 pages, 3 figures, Submitted to PRL

Scientific paper

We compare the collective modes for Bose-condensed systems with two degenerate components with and without spontaneous intercomponent coherence at finite temperature using the time-dependent Hartree-Fock approximation. We show that the interaction between the condensate and non-condensate in these two cases results in qualitatively different collective excitation spectra. We show that at zero temperature the single-particle excitations of the incoherent Bose condensate can be probed by intercomponent excitations.

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