Editorial
Density dependence, triplet correlation and different potentials effect on the single excitation spectrum in liquid 4He
Mile Dželalija
; Department of Mathematics and Physics, University of Split, Teslina 12, 58000 Split, Yugoslavia
Srećko Kilić
; Department of Mathematics and Physics, University of Split, Teslina 12, 58000 Split, Yugoslavia
Abstract
Using Brillouin-Wigner (BW) perturbation formula, we analysed density and different potentials effect in the maxon and roton part of the single excitation spectrum in liquid 4He. In addition having two different forms of the three body structure factor we derived the influence of the triplet correlations. The most impressive result is that the term, with tree phonon states, in the second order of BW formula significantly depends upon density. This is what has been anticipated by our earlier research. We also found that the differences among the used potentials appeared at higher densities.
Keywords
Hrčak ID:
331332
URI
Publication date:
10.1.1988.
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