Phase transition in the transverse Ising model using the extended coupled-cluster method

Authors
Rosenfeld, J Ligterink, NE
Citation
J. Rosenfeld et Ne. Ligterink, Phase transition in the transverse Ising model using the extended coupled-cluster method, PHYS REV B, 62(1), 2000, pp. 308-315
Citations number
22
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
01631829 → ACNP
Volume
62
Issue
1
Year of publication
2000
Pages
308 - 315
Database
ISI
SICI code
0163-1829(20000701)62:1<308:PTITTI>2.0.ZU;2-X
Abstract
The phase transition present in the linear-chain and square-lattice cases o f the transverse Ising model is examined. The extended coupled-cluster meth od (ECCM) can describe both sides of the phase transition with a unified ap proach. The correlation length and the excitation energy are determined. Th e ECCM is able to use both the weak- and the strong-coupling starting state s within a calculation based on the same uncorrelated model state.