Title:
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Exact lower bounds to the ground-state energy of spin systems: The two-dimensional S=1/2 antiferromagnetic Heisenberg model
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Author:
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Tarrach, R., 1948-; Valentí i Vall, M. Roser
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Other authors:
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Universitat de Barcelona |
Abstract:
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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. |
Subject(s):
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-Superconductors -Magnetisme -Superconductors -Magnetism |
Rights:
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(c) The American Physical Society, 1990
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Document type:
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Article Article - Published version |
Published by:
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The American Physical Society
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