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Ensemble dependence of the critical behavior of a system with long-range interaction and quenched randomness
We propose a hybrid model governed by the Blume-Emery-Griffiths (BEG) Hamiltonian with a mean-field-like interaction, where the spins are randomly quenched such that some of them are ``pure'' Ising and the others admit the BEG set of states. It is found, by varying the concentration of the Ising spins, that …