Practical solution to the Monte Carlo sign problem: Realistic calculations of Fe54

Y. Alhassid, D. J. Dean, S. E. Koonin, G. Lang, W. E. Ormand

Research output: Contribution to journalArticle

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 the Fe54 in the full fp-shell basis using the Brown-Richter interaction. We find the Gamow-Teller + strength to be quenched by 58% relative to the single-particle estimate, in better agreement with experiment than previous estimates based on truncated bases.

Original languageEnglish (US)
Pages (from-to)613-616
Number of pages4
JournalPhysical Review Letters
Volume72
Issue number5
DOIs
StatePublished - 1994

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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