Practical solution to the Monte Carlo sign problem: Realistic calculations of 54Fe

Preprint

22 December 1993

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.nucl-th/9310026

Abstract

We present a practical solution to the "sign problem" in the auxiliary field Monte Carlo approach to the nuclear shell model. The method is based on extrapolation from a continuous family of problem-free Hamiltonians. To demonstrate the resultant ability to treat large shell-model problems, we present results for 54Fe in the full fp-shell basis using the Brown-Richter interaction. We find the Gamow-Teller beta^+ strength to be quenched by 58% relative to the single-particle estimate, in better agreement with experiment than previous estimates based on truncated bases.

Keywords

REALISTIC CALCULATIONS
PRACTICAL SOLUTION
BASED ON TRUNCATED
SIGN PROBLEM
MONTE CARLO
CARLO SIGN
PARTICLE
54FE

All Related Versions

Version 1, 1993-10-20, ArXiv
Version 2, 1993-12-22, ArXiv
Published version: Physical Review Letters, 72 (5), 613.

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