Links between nonlinear dynamics and statistical mechanics in a simple   one-dimensional model
  We consider the links between nonlinear dynamics and thermodynamics in the framework of a simple nonlinear model for DNA. Two analyses of the phase transition, either with the transfer integral approach or by considering the instability of a nonlinear particular solution, are discussed. Conversely, the computation of the largest Lyapunov exponent is obtained within a thermodynamic treatment. Differences with the Peyrard-Bishop model are also discussed. 
Hicham Qasmi, Julien Barre', Thierry Dauxois