Method simplifying calculation of coefficients of fractional parentage for translationally invariant shell-model |
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Authors: | Saulius Mickevičius Darius Germanas Ramutis K. Kalinauskas |
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Affiliation: | 1215. Vytautas Magnus University, K. Donelai?io 58, LT-44248, Kaunas, Lithuania 2215. Center for Physical Sciences and Technology, Savanori? 231, LT-02300, Vilnius, Lithuania
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Abstract: | A new procedure for large-scale calculations of the coefficients of fractional parentage (CFP) for many-particle systems is presented. The approach is based on a simple enumeration scheme for antisymmetric N particle states, and we suggest an efficient method for constructing the eigenvectors of two-particle transposition operator $P_{N_1 ,N}$ in a subspace where N 1 and N 2 = N ? N 1 nucleons basis states are already antisymmetrized. The main result of this paper is that according to permutation operators $P_{N_1 ,N}$ eigenvalues we can distinguish totally asymmetrical N particle states from the other states with lower degree of asymmetry. |
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