Linear energy bounds for Heisenberg spin systems

Details Linear energy bounds for Heisenberg spin systems Linear energy bounds for Heisenberg spin systems

2002-03-13

arxiv.org/abs/cond-mat/0203270v1

Physics

Condensed Matter

Scientific paper

10.1088/0305-4470/35/31/302

Recently obtained results on linear energy bounds are generalized to arbitrary spin quantum numbers and coupling schemes. Thereby the class of so-called independent magnon states, for which the relative ground-state property can be rigorously established, is considerably enlarged. We still require that the matrix of exchange parameters has constant row sums, but this can be achieved by means of a suitable gauge and need not be considered as a physical restriction.

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