The method of exact diagonalization preserving the total spin and taking the point symmetry of the two-dimensional isotropic Heisenberg magnet into account / Bostrem I. G.,Ovchinnikov A. S.,Sinitsyn V. E. // THEORETICAL AND MATHEMATICAL PHYSICS. - 2006. - V. 149, l. 2. - P. 1527-1544.

ISSN/EISSN:

0040-5779 / нет данных

Type:

Article

Abstract:

We propose a double-pass method of exact diagonalization of a finite cluster on the base of functions that have a definite total spin and transform by a definite irreducible representation of the point symmetry group of the lattice. We also propose the method for approximating the energy spectrum in the thermodynamic limit using the spectrum of the surrounding states, which increases the calculation accurarcy leaving the cluster size invariant. The algorithm details are extensively illustrated with an example of clusters of spin 1/2 on a simple square lattice.

Author keywords:

Heisenberg model; exact diagonalization; cluster calculations; group theory; angular momentum theory; two-dimensional antiferromagnet DENSITY-MATRIX RENORMALIZATION; CHAINS

DOI:

10.1007/s11232-006-0136-z

Web of Science ID:

ISI:000242873600008

Соавторы в МНС:

Другие поля

Поле	Значение
Month	NOV
Publisher	CONSULTANTS BUREAU/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013 USA
Language	English
Keywords-Plus	DENSITY-MATRIX RENORMALIZATION; CHAINS
Research-Areas	Physics
Web-of-Science-Categories	Physics, Multidisciplinary; Physics, Mathematical
Author-Email	Irene.Bostrem@usu.ru Alexander.Ovchinnikov@usu.ru Valentine.Sinitsyn@usu.ru
ResearcherID-Numbers	Ovchinnikov, Alexander/B-9906-2009
ORCID-Numbers	Ovchinnikov, Alexander/0000-0002-1173-9260
Number-of-Cited-References	19
Usage-Count-Since-2013	2
Journal-ISO	Theor. Math. Phys.
Doc-Delivery-Number	117LC