Abstract: In this talk, I discuss how to obtain some critical exponents that describe a transition from integrability to non-integrability in a two-dimensional, nonlinear and area-preserving map. The procedure uses a connection with a standard map in the localisation of the first invariant tori in the phase space where a transition takes place from local to global chaos. The phase space of the mapping shows a large chaotic sea surrounding periodic islands and limited by a set of invariant tori whose position of the first of them depends on the control parameters. The formalism leads us to obtain analytically critical exponents that describe the behaviour of the average variable (action) along the chaotic sea. The result is compared to several models in the literature. At the end we give also a glance of some results in classical billiard dynamics.
Seminarsko predavanje bo v petek 6. julija 2012 ob 15:15 uri v seminarski sobi CAMTP, Krekova 2, pritlicje desno. Vljudno vabljeni vsi zainteresirani, tudi študentje.