期刊
PHYSICAL REVIEW LETTERS
卷 109, 期 3, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.109.032503
关键词
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资金
- U.S. Department of Energy [DE-FG02-91ER40608]
- Division Of Computer and Network Systems
- Direct For Computer & Info Scie & Enginr [821132] Funding Source: National Science Foundation
- U.S. Department of Energy (DOE) [DE-FG02-91ER40608] Funding Source: U.S. Department of Energy (DOE)
The shell model Monte Carlo method is a powerful technique to calculate thermal and ground-state properties of strongly correlated finite-size systems. However, its application to odd-particle-number systems has been hampered by the sign problem that originates from the projection on an odd number of particles. We circumvent this sign problem for the ground-state energy by extracting the ground-state energy of the odd-particle-number system from the asymptotic behavior of the imaginary-time single-particle Green's function of the even-particle-number system. We apply this method to calculate pairing gaps of nuclei in the iron region. Our results are in good agreement with experimental pairing gaps.
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