Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2006-01-16
Physics
Condensed Matter
Statistical Mechanics
12 pages
Scientific paper
10.1088/1742-5468/2006/03/P03011
The behaviour of the mean Euler-Poincar\'{e} characteristic and mean Betti's numbers in the Ising model with arbitrary spin on $\mathbbm{Z}^2$ as functions of the temperature is investigated through intensive Monte Carlo simulations. We also consider these quantities for each color $a$ in the state space $S\_Q = \{- Q, - Q + 2, ..., Q \}$ of the model. We find that these topological invariants show a sharp transition at the critical point.
Blanchard Philippe
Dobrovolny Christophe
Gandolfo Daniel
Ruiz Jean
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