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Structural and dynamical properties of superfluid helium: a density functional approach
F. Dalfovo, A. Lastri, L. Pricaupenko +2
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…
Time dependent density functional theory in quantum liquids
Sandro Stringari
The formalism of density functional theory (DFT) can be easily extended to the time dependent case (TDDFT). However, while in the static case the theory is well established and is…
Density Functional in Liquid Helium: Recent Applications to Droplets and Surfaces
Franco Dalfovo, Andrea Lastri, Sandro Stringari
We present a new density functional, which is the result of a natural evolution and improvement of previous density functional theories for liquid helium. We focus on the key ingre…
Dispersion of Ripplons in Superfluid 4he
A. Lastri, F. Dalfovo, L. Pitaevskii +1
A detailed study of the dispersion law of surface excitations in liquid \hef at zero temperature is presented, with special emphasis to the short wave length region. The hybridizat…
Effects of Disorder in a Dilute Bose Gas
S. Giorgini, L. Pitaevskii, S. Stringari
We discuss the effects of a weak random external potential on the properties of the dilute Bose gas at zero temperature. The results recently obtained by Huang and Meng for the dep…
Variational Calculations for He Impurities on He Droplets
A. Belić, F. Dalfovo, S. Fantoni +1
Variational Monte Carlo method is used to calculate ground state properties of He droplets, containing 70, 112, 168, 240, 330, and 728 particles. The resulting particle and kin…