Study of variational-cumulant expansion of the quantum Heisenberg hyperfilm

Authors
Chen, H Zheng, RL
Citation
H. Chen et Rl. Zheng, Study of variational-cumulant expansion of the quantum Heisenberg hyperfilm, ACT PHY C E, 49(2), 2000, pp. 293-296
Citations number
10
Categorie Soggetti
Physics
Journal title
ACTA PHYSICA SINICA
ISSN journal
10003290 → ACNP
Volume
49
Issue
2
Year of publication
2000
Pages
293 - 296
Database
ISI
SICI code
1000-3290(200002)49:2<293:SOVEOT>2.0.ZU;2-C
Abstract
The quantum Heisenberg hyperfilm is studied by the variational-cumulant exp ansion method. From the analytic properties of free energy, the critical re duced temperature theta(c)(l) can in principle be calculated to any order c umulant expansion as a function of the number l of hyperlayers in hyperfilm . Explicit expressions for theta(c)(l) up to the third order are given for various lattices and spins.