Títol:
|
Exact lower bounds to the ground-state energy of spin systems: The two-dimensional S=1/2 antiferromagnetic Heisenberg model
|
Autor/a:
|
Tarrach, R., 1948-; Valentí i Vall, M. Roser
|
Altres autors:
|
Universitat de Barcelona |
Abstract:
|
We present a very simple but fairly unknown method to obtain exact lower bounds to the ground-state energy of any Hamiltonian that can be partitioned into a sum of sub-Hamiltonians. The technique is applied, in particular, to the two-dimensional spin-1/2 antiferromagnetic Heisenberg model. Reasonably good results are easily obtained and the extension of the method to other systems is straightforward. |
Matèries:
|
-Superconductors -Magnetisme -Superconductors -Magnetism |
Drets:
|
(c) The American Physical Society, 1990
|
Tipus de document:
|
Article Article - Versió publicada |
Publicat per:
|
The American Physical Society
|
Compartir:
|
|