期刊
COMPUTER PHYSICS COMMUNICATIONS
卷 283, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.cpc.2022.108583
关键词
Nuclear structure theory; Angular -momentum projection; Gaussian quadrature; Nuclear shell model calculations
This study investigates the conditions of quadrature accuracy in the angular-momentum projection method, and introduces the Lebedev quadrature and spherical t-design for efficient computation.
While the angular-momentum projection is a common tool for theoretical nuclear structure studies, a large amount of computations are required particularly for triaxially deformed states. In the present work, we clarify the conditions of the exactness of quadratures in the projection method. For efficient computation, the Lebedev quadrature and spherical t-design are introduced to the angular-momentum projection. The accuracy of the quadratures is discussed in comparison with the conventional Gauss-Legendre and trapezoidal quadratures. We found that the Lebedev quadrature is the most efficient among them and the necessary number of sampling points for the quadrature, which is often proportional to the computation time, is reduced by a factor 2/3 in comparison with the conventional method.(c) 2022 Elsevier B.V. All rights reserved.
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