Practical solution to the Monte Carlo sign problem: Realistic calculations of 54Fe
Nuclear Theory
2008-11-26 v2 High Energy Physics - Lattice
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
Cite
@article{arxiv.nucl-th/9310026,
title = {Practical solution to the Monte Carlo sign problem: Realistic calculations of 54Fe},
author = {Y. Alhassid and D. J. Dean and S. E. Koonin and G. Lang and W. E. Ormand},
journal= {arXiv preprint arXiv:nucl-th/9310026},
year = {2008}
}
Comments
11 pages + 2 figures (not included)