Original scientific paper
Elementary excitation interactions in bose fluids in the Bogoliubov approximation
Srećko Kilić
; Faculty of Natural Sciences and Arts University of Split, Split, Croatia
Abstract
The effective interaction energy of quasiparticles in the Bose fluid, which is described by "ladder state diagrams" in the Bogoliubov approximation, was studied for a model potential. It is shown that in the Bogoliubov approximation, the interaction of excitations in liquid 4He can not be described even qualitatively. It means that a model of the weakly interacting dilute Bose gas fails in describing the interaction between excitation in Bose-condensed liquid, although this model qualitatively incorporates superfluidity in itself.
Keywords
Hrčak ID:
299547
URI
Publication date:
1.9.1995.
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