Spectral density method applied to the study of the energy spectrum of the XY model in a transverse field

The energy spectrum of the XY model in a transverse field is studied by the spectral density method (SDM), using polar and Gaussian „ansätze”︁. Expressions for the critical temperature and critical transverse field are obtained. It is shown that, within some approximations, the static properties of...

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Veröffentlicht in:	Physica status solidi. B. Basic research 1986-06, Vol.135 (2), p.581-586
Hauptverfasser:	Bernardes, L. A. B., Borges, O. N., Ribeiro, L. A. Amarante
Format:	Artikel
Sprache:	eng
Schlagworte:	Condensed matter: electronic structure, electrical, magnetic, and optical properties Exact sciences and technology General theory and models of magnetic ordering Magnetic properties and materials Physics Quantized spin models
Online-Zugang:	Volltext
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