Dynamics of liquid He-4 in confined geometries from Time-Dependent Density Functional calculations

Abstract

We present numerical results obtained from Time-Dependent Density Functional calculations of the dynamics of liquid He-4 in different environments characterized by geometrical confinement. The time-dependent density profile and velocity field of He-4 are obtained by means of direct numerical integration of the non-linear Schrodinger equation associated with a phenomenological energy functional which describes accurately both the static and dynamic properties of bulk liquid He-4. Our implementation allows for a general solution in 3-D (i.e. no symmetries are assumed in order to simplify the calculations). We apply our method to study the real-time dynamics of pure and alkali-doped clusters, of a monolayer film on a weakly attractive surface and a nano-droplet spreading on a solid surface.

arXiv commentq 1 tex file + 9 Ps figures

References in corpus (7)

• Structural and dynamical properties of superfluid helium: a density functional approach
• Atomic and Molecular Impurities in ${}^4$He Clusters
• Pinning of quantized vortices in helium drop by dopant atoms and molecules
• Wetting transitions of He4 on alkali metal surfaces from density functional calculations
• Density functional calculations for 4He droplets
• Rotons and Quantum Evaporation from Superfluid 4He
• Quantum Evaporation from the Free Surface of Superfluid 4He

Cited by in corpus (8)

• Density Functional Theory of doped superfluid liquid helium and nanodroplets
• Excited electron-bubble states in superfluid helium-4: a time-dependent density functional approach
• Absorption spectrum of Ca atoms attached to ${}^4$He nanodroplets
• Probing vortices in 4He nanodroplets
• Desorption Dynamics of Heavy Alkali Metal Atoms (Rb, Cs) off the Surface of Helium Nanodroplets
• Density pattern in supercritical flow of liquid He-4
• Evolution of the excited electron bubble in liquid 4He and the appearance of fission-like processes
• Vortex Nucleation Induced Phonon Radiation from a Moving Electron Bubble in Superfluid 4He