Classical aspects of quantum spin chains

L. F. Lemmens, K. Kopinga, W.J.M. De Jonge

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

3 Citaten (Scopus)
51 Downloads (Pure)

Samenvatting

We suggest a new variational approach for quantum spin chains, based on the stochastic behavior of the quantization axes, which describes a chain in terms of a classical and a quantum contribution to the free energy. For an easy-plane ferromagnetic chain with the external field in the plane it reveals that the nonlinear excitations are predominantly described by the classical degrees of freedom. Hence it offers a fundamental basis for the description of the elementary excitations of such systems in terms of classical solitons and quantum spin waves, as suggested by various experiments.

Originele taal-2Engels
Pagina's (van-tot)5-8
Aantal pagina's4
TijdschriftPhysical Review Letters
Volume63
Nummer van het tijdschrift1
DOI's
StatusGepubliceerd - 1 jan 1989

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