Physics – Condensed Matter – Other Condensed Matter
Scientific paper
2006-07-19
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.
Fertig Herbert A.
Zhang Chun-Hua
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