Application of algebraic combinatorics to finite spin systems with dihedral symmetry

Details Application of algebraic combinatorics to finite spin systems with dihedral symmetry Application of algebraic combinatorics to finite spin systems with dihedral symmetry

2002-12-19

arxiv.org/abs/cond-mat/0212476v1

Acta Phys. Polon. A 100 (2001) 453

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

3 eps figs, 24 pages

Scientific paper

Properties of a given symmetry group G are very important in investigation of a physical system invariant under its action. In the case of finite spin systems (magnetic rings, some planar macromolecules) the symmetry group is isomorphic with the dihedral group D_N. In this paper group-theoretical `parameters' of such groups are determined, especially decompositions of transitive representations into irreducible ones and double cosets. These results are necessary to construct matrix elements of any operator commuting with G in an efficient way. The approach proposed can be usefull in many branches of physics, but here it is applied to finite spin systems, which serve as models for mesoscopic magnets.

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