Diffusion Monte Carlo Study of Two-dimensional Liquid 4 He Typeset Using Revt E X 1
نویسندگان
چکیده
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.
منابع مشابه
Progress in Monte Carlo Calculations of Fermi Systems: Normal Liquid 3 He Typeset Using Revt E X
The application of the diffusion Monte Carlo method to a strongly interacting Fermi system as normal liquid 3 He is explored. We show that the fixed-node method together with the released-node technique and a systematic method to analytically improve the nodal surface constitute an efficient strategy to improve the calculation up to a desired accuracy. This methodology shows un-ambiguously that...
متن کاملar X iv : c on d - m at / 9 60 61 10 v 1 1 4 Ju n 19 96 Vortex excitation in superfluid 4 He : A Diffusion Monte Carlo study
We present a diffusion Monte Carlo study of a single vortex in two-dimensional superfluid liquid 4 He within the fixed node approximation. We use both the Feynman phase and an improved phase which includes backflow correlations to model the nodal surface of the vortex wavefunction. Results for the particle density, core radius and excitation energies are presented.
متن کاملTypeset Using Revt E X 1
We present a simple, sophisticated method to capture renormalization group flow in Monte Carlo simulation, which provides important information of critical phenomena. We applied the method to D = 3, 4 lattice φ 4 model and obtained renormalization flow diagram which well reproduces theoretically predicted behavior of continuum φ 4 model. We also show that the method can be easily applied to muc...
متن کاملA Proposal of a Renormalization Group Transformation for Lattice Field Theories Typeset Using Revt E X
We propose a new Real Space Renormalization Group transformation useful for Monte Carlo calculations in theories with global or local symmetries. From relaxation arguments we deene the block-spin transformation with two tunable free parameters, adapted to the system's action. Varying them it is possible to place the xed point very close to the simulation point. We show how the method works in a...
متن کاملTypeset Using Revt E X 1
A Monte Carlo study of temperature-programmed desorption spectra with attractive lateral interactions. Abstract We present results of a Monte Carlo study of temperature-programmed des-orption in a model system with attractive lateral interactions. It is shown that even for weak interactions there are large shifts of the peak maximum temperatures with initial coverage. The system has a transitio...
متن کامل