Variational Monte Carlo study of spin-dependent correlations in liquidHe3
- 1 August 1984
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 30 (3) , 1342-1348
- https://doi.org/10.1103/physrevb.30.1342
Abstract
The Jastrow trial function for the ground state of liquid is generalized by the introduction of two-body correlations which depend on the components of the nuclear spins. For this trial function both Metropolis Monte Carlo and standard Fermi-hypernetted-chain evaluations of the energy and the like-spin and unlike-spin radial distribution functions are carried out. It is demonstrated that as a consequence of the omission of elementary diagrams the latter procedure suffers large errors in the physically relevant domain of variational parameters, where the dynamical correlation hole associated with unlike-spin pairs is larger than that for like-spin pairs. In the complementary regime where the like-spin dynamical correlations are the more important, the errors of the Fermihypernetted-chain procedure are less serious. In agreement with previous studies, it is found that spin-dependent correlations can make an appreciable contribution (~0.2 K or more) to the ground-state binding energy of liquid .
Keywords
This publication has 30 references indexed in Scilit:
- Microscopic calculations for normal and polarized liquidPhysical Review B, 1983
- Energy dependence of the effective mass in liquid3HeJournal of Low Temperature Physics, 1982
- Spin-density fluctuations and the energy of liquidHe3Physical Review B, 1982
- Structure of the Ground State of a Fermion FluidPhysical Review Letters, 1981
- Simple model for the quasiparticle interactions in. II. Transport coefficients and the superfluid free energyPhysical Review B, 1979
- New variational wave function for liquidPhysical Review B, 1979
- Fermi-hypernetted-chain methods and the ground state of fermion matterPhysical Review A, 1977
- Variational method for liquid3He. I. The Fermi hypernetted-chain approachJournal of Low Temperature Physics, 1977
- Variational problem in Jastrow theoryPhysical Review A, 1977
- X-Ray Scattering from Liquid HeliumPhysical Review B, 1969