Coexistence of excited states in confined Ising systems

Authors
Citation
A. Drzewinski, Coexistence of excited states in confined Ising systems, PHYS REV E, 62(3), 2000, pp. 4378-4381
Citations number
30
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW E
ISSN journal
1063651X → ACNP
Volume
62
Issue
3
Year of publication
2000
Part
B
Pages
4378 - 4381
Database
ISI
SICI code
1063-651X(200009)62:3<4378:COESIC>2.0.ZU;2-9
Abstract
Using the density-matrix renormalization-group method we study the two-dime nsional Ising model in an infinite strip geometry with free-boundary condit ions. The renormalization scheme enables us to consider systems of width up to 300 (lattice spacings) and study the influence of the bulk magnetic fie ld on correlation function structure for all temperatures. Rom our numerica l results we have determined the crossover line for the correlation length related to the coexistence of the excited states. A detailed scaling study of this line is performed. Our numerical results support and further specif y previous conclusions reached by Abraham, Parry, and Upton based on the bu bble model of correlations.