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A class of 6-j symbols for SO(2l+1) in terms of rotation matrices for SO(3)

B R Judd

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It is shown that a 6-j symbol for SO(2l+1) in which four primitive spinor representations (1/21/2. . .1/2) appear is directly related to an SO(3) rotation matrix possessing a rank of l+1/2 and characterised by the Euler angles (0, 1/2 pi , 0). An interpretation is given in terms of a rotation operator exp(1/2i pi Ty) acting in the combined spin and quasispin space of an atomic l shell, whose states mod T, MT) are defined in a quasiparticle scheme in which four coupled spinors (1/21/2. . .1/2) are used.


PACS

02.10.Yn Matrix theory

02.20.Qs General properties, structure, and representation of Lie groups

03.65.Fd Algebraic methods

02.10.Ud Linear algebra

MSC

81R25 Spinor and twistor methods (See also 32L25)

15A66 Clifford algebras, spinors

15A18 Eigenvalues, singular values, and eigenvectors

Subjects

Mathematical physics

Quantum information and quantum mechanics

Dates

Issue 6 (21 April 1987)



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