The Clebsch-Gordan coefficients and isoscalar factors of the graded unitary group SU(m/n)
- 1 February 1983
- journal article
- Published by IOP Publishing in Journal of Physics A: General Physics
- Vol. 16 (2) , L47-L53
- https://doi.org/10.1088/0305-4470/16/2/001
Abstract
It is pointed out that the Clebsch-Gordan coefficients (CGC) of the permutation group are the coefficients which couple irreducible bases (IRB) of SU(m/n) and SU(p/q) to the IRB of SU(mp+nq/mp+np), and the outer-product reduction coefficients (ORC) of the permutation group are the coefficients which couple the IRB of SU(m/n) and SU(p/q) into the IRB of SU(m+p/n+q). The ORC of permutation groups with due modification in signs are the CGC for the special Gel'fand basis of SU(m/n). The isoscalar factor (ISF) for the permutation group chain S(f) contains/implies S(f1)*S(f2) is the ISF for the graded unitary group chain SU(mp+nq/mq+np) contains/implies SU(m/n)*SU(p/q), and the outer-product ISF for the group chain S(f) contains/implies S(f1)*S(f2) is the ISF for SU(mp+nq/mq+np) contains/implies SU(m/n)(X)SU(p/q). All these coefficients can be calculated easily and some are already available.Keywords
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