Abstract
The temperature dependence of the static structure factor of superfluid4He is given an interpretation in terms of the Feynman-Cohen picture of the elementary excitations by constructing the corresponding microscopic density matrix and including the effect of three-body terms. The required information on the ground-state wave function is taken over from configurations drawn from a Green's Function Monte Carlo computation. Correlations become stronger at finite temperatures in agreement with experiment. Backflow has only a modest effect onS(k, T).
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Oddi, L., Whitlock, P.A. & Reatto, L. Roton backflow and the temperature dependence of the static structure factor of superfluid4He. J Low Temp Phys 92, 201–216 (1993). https://doi.org/10.1007/BF00682337
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DOI: https://doi.org/10.1007/BF00682337