Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2010-12-09
Fractals 18:371-383,2010
Physics
Condensed Matter
Statistical Mechanics
15 pages, 12 figures
Scientific paper
10.1142/S0218348X10005007
We considered Q-state Potts model on Bethe lattice in presence of external magnetic field for Q<2 by means of recursion relation technique. This allows to study the phase transition mechanism in terms of the obtained one dimensional rational mapping. The convergence of Feigenabaum $\alpha$ and $\delta$ exponents for the aforementioned mapping is investigated for the period doubling and three cyclic window. We regarded the Lyapunov exponent as an order parameter for the characterization of the model and discussed its dependence on temperature and magnetic field. Arnold tongues analogs with winding numbers w=1/2, w=2/4 and w=1/3 (in the three cyclic window) are constructed for Q<2. The critical temperatures of the model are discussed and their dependence on Q is investigated. We also proposed an approximate method for constructing Arnold tongues via Feigenbaum $\delta$ exponent.
Ananikian N. S.
Ananikyan L. N.
Chakhmakhchyan L. A.
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