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$J$-pairing interaction, number of states, and nine-$j$ sum rules of four identical particles | | Y. M. Zhao
; A. Arima
; | | Date: |
8 Aug 2005 | | Subject: | nucl-th | | Abstract: | In this paper we study $J$-pairing Hamiltonian and find that the sum of eigenvalues of spin $I$ states equals sum of norm matrix elements within the pair basis for four identical particles such as four fermions in a single-$j$ shell or four bosons with spin $l$. We relate number of states to sum rules of nine-$j$ coefficients. We obtained sum rules for nine-$j$ coefficients $<(jj)J,(jj)K:I| (jj)J, (jj)K:I>$ and $<(ll)J,(ll)K:I| (ll)J, (ll)K:I>$ summing over (1) even $J$ and $K$, (2) even $J$ and odd $K$, (3) odd $J$ and odd $K$, and (4) both even and odd $J,K$, where $j$ is a half integer and $l$ is an integer. | | Source: | arXiv, nucl-th/0508018 | | Services: | Forum | Review | PDF | Favorites | |
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