Editing Mean field models
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Latest revision | Your text | ||
Line 13: | Line 13: | ||
Therefore, the Hamiltonian turns to | Therefore, the Hamiltonian turns to | ||
:<math> U = - J n \sum_i^N S_i \bar{s} , </math> | :<math> U = - J n \sum_i^N S_i \bar{s} , </math> | ||
as in the regular Langevin theory of magnetism | as in the regular Langevin theory of magnetism: the spins are independent, but coupled to a constant field of strength | ||
:<math>H= J n \bar{s}.</math> | :<math>H= J n \bar{s}.</math> | ||
The magnetization of the Langevin theory is | The magnetization of the Langevin theory is |