Structural and dynamical properties of superfluid helium: a density functional approach

Abstract

We present a novel density functional for liquid 4He, properly accounting for the static response function and the phonon-roton dispersion in the uniform liquid. The functional is used to study both structural and dynamical properties of superfluid helium in various geometries. The equilibrium properties of the free surface, droplets and films at zero temperature are calculated. Our predictions agree closely to the results of ab initio Monte Carlo calculations, when available. The introduction of a phenomenological velocity dependent interaction, which accounts for backflow effects, is discussed. The spectrum of the elementary excitations of the free surface and films is studied.

37 pages, REVTeX 3.0, figures on request at [email protected]

References in corpus (3)

• Atomic and Molecular Impurities in ${}^4$He Clusters
• Monte Carlo Calculations for Liquid ${}^4$He at Negative Pressure
• Dispersion of Ripplons in Superfluid 4he

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