Progress in Monte Carlo Calculations of Fermi Systems: Normal Liquid 3 He Typeset Using Revt E X
نویسندگان
چکیده
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 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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