Linear energy bounds for Heisenberg spin systems
Autor(en): | Schmidt, HJ | Stichwörter: | APPROXIMATING PARABOLAS; LADDERS; MAGNETIC-FIELD; Physics; Physics, Mathematical; Physics, Multidisciplinary; PLATEAUS; SPECTRUM | Erscheinungsdatum: | 2002 | Herausgeber: | IOP PUBLISHING LTD | Journal: | JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL | Volumen: | 35 | Ausgabe: | 31 | Startseite: | 6545 | Seitenende: | 6555 | Zusammenfassung: | 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. |
ISSN: | 03054470 | DOI: | 10.1088/0305-4470/35/31/302 |
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geprüft am 20.05.2024