THE T-EXPANSION STUDY OF CRITICAL PHENOMENA IN QUANTUM-SYSTEMS

Authors
SAMAJ L KALINAY P MARKOS P TRAVENEC I
Citation
L. Samaj et al., THE T-EXPANSION STUDY OF CRITICAL PHENOMENA IN QUANTUM-SYSTEMS, Journal of physics. A, mathematical and general, 30(5), 1997, pp. 1471-1482
Citations number
19
Categorie Soggetti
Physics
Journal title
Journal of physics. A, mathematical and general → ACNP
ISSN journal
03054470
Volume
30
Issue
5
Year of publication
1997
Pages
1471 - 1482
Database
ISI
SICI code
0305-4470(1997)30:5<1471:TTSOCP>2.0.ZU;2-6
Abstract
For quantum systems in the ground state, the t-expansion technique is used to construct a canonical sequence of classical theories. The cons equent application of the coherent-anomaly method provides an estimati on of the non-classical values of critical indices related to the sing ular behaviour of the ground-state energy. The accuracy of the results is tested on the Ising model with a transverse field, formulated on t wo- and three-dimensional lattices.