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Upper bound on the free energy of the spin 1/2 Heisenberg ferromagnet
Conlon, Joseph G.; Solovej, Jan Philip
1991-11
Citation:Conlon, Joseph G.; Solovej, Jan Philip; (1991). "Upper bound on the free energy of the spin 1/2 Heisenberg ferromagnet." Letters in Mathematical Physics 23 (3): 223-231. <http://hdl.handle.net/2027.42/43209>
Abstract: The authors obtain an upper bound on the free energy of the spin 1/2 Heisenberg ferromagnet. The zero field bound is, at low temperature, similar to the formula given by the magnon approximation. That is, its functional dependence on temperature is the same but the constant is different.
