H. P. van de Braak, W. J. Caspers, P. K. H. Gragert — An upper bound for the ground-state energy of an antiferromagnetic chain with next-nearest-neighbor interaction
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Название: An upper bound for the ground-state energy of an antiferromagnetic chain with next-nearest-neighbor interaction
Авторы: H. P. van de Braak, W. J. Caspers, P. K. H. Gragert
Аннотация:
A trial function for the ground state of the antiferromagnetic linear chain leads to an equation for an upper bound of the ground-state energy per spin. This equation is solved exactly.
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