Diffusion Monte Carlo study of two-dimensional liquid ${}^4$He

Abstract

The ground-state properties of two-dimensional liquid ${}^4$He at zero temperature are studied by means of a quadratic diffusion Monte Carlo method. As interatomic potential we use a revised version of the HFDHE2 Aziz potential which is expected to give a better description of the interaction between helium atoms. The equation of state is determined with great accuracy over a wide range of densities in the liquid phase from the spinodal point up to the freezing density. The spinodal decomposition density is estimated and other properties of the liquid, such as radial distribution function, static form factor, momentum distribution and density dependence of the condensate fraction are all presented.

19 pages, RevTex 3.0, 7 figures available upon request

References in corpus (3)

• Structural and dynamical properties of superfluid helium: a density functional approach
• Monte Carlo Analysis of a New Interatomic Potential for He
• Unbiased estimators in Quantum Monte Carlo methods: application to liquid ${}^4$He

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• Two-dimensional clusters of liquid 4-He
• Structure of metastable 2D liquid helium
• Density functional study of two-dimensional He-4 clusters