Models of DNA Denaturation Dynamics: Universal Properties

We briefly review some of the models used to describe DNA denaturation dynamics, focusing on the value of the dynamical exponent z, which governs the scaling of the characteristic time T similar to L-z as a function of the sequence length L. The models contain different degrees of simplifications, in particular sometimes they do not include a description for helical entanglement: we discuss how this aspect influences the value of z, which ranges from z = 0 to z approximate to 3.3. Connections with experiments are also mentioned.