Progress in Monte Carlo calculations of Fermi systems: normal liquid 3He

Details Progress in Monte Carlo calculations of Fermi systems: normal liquid 3He Progress in Monte Carlo calculations of Fermi systems: normal liquid 3He

1999-09-07

arxiv.org/abs/cond-mat/9909099v1

Physics

Condensed Matter

Statistical Mechanics

14 pages, 3 eps figures

Scientific paper

10.1103/PhysRevLett.84.3121

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 unambiguously that backflow correlations, when properly optimized, are enough to generate an equation of state of liquid $^3$He in excellent agreement with experimental data from equilibrium up to freezing.

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