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1990

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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/9768

Exact lower bounds to the ground-state energy of spin systems: The two-dimensional S=1/2 antiferromagnetic Heisenberg model

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http://dx.doi.org/10.1103/PhysRevB.41.9611

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.

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Superconductors, Magnetisme

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Superconductors, Magnetism

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Articles publicats en revistes (Física Quàntica i Astrofísica)

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TARRACH, R. and VALENTÍ I VALL, M. Roser. Exact lower bounds to the ground-state energy of spin systems: The two-dimensional S=1/2 antiferromagnetic Heisenberg model. Physical Review B. 1990. Vol. 41, num. 13, pags. 9611-9613. ISSN 0163-1829. [consulted: 17 of June of 2026]. Available at: https://hdl.handle.net/2445/9768

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