1.2. Potts model In the Potts model, the spin variable i assume q value, as {0, 1,...
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1.2. Potts model In the Potts model, the spin variable σi assume q value, as {0, 1, . . . ,q−1}. The energy of the configurations is given by H = −J
ij
δσi ,σj ,
where δa,b = 1 if a = b 0 if a = b.
a. Identify the symmetry transformations of the spins that leave the Hamiltonian invariant.
b. Show that for q = 2, the Potts model is equivalent to the Ising model.
c. Discuss the configuration of the minimum energy in the anti-ferromagnetic limit J→−∞.
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Related Book For
Statistical Field Theory An Introduction To Exactly Solved Models In Statistical Physics
ISBN: 9780198788102
2nd Edition
Authors: Giuseppe Mussardo
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