From synchronization to multistability in two coupled quadratic maps
  The phenomenology of a system of two coupled quadratic maps is studied both analytically and numerically. Conditions for synchronization are given and the bifurcations of periodic orbits from this regime are identified. In addition, we show that an arbitrarily large number of distinct stable periodic orbits may be obtained when the maps parameter is at the Feigenbaum period-doubling accumulation point. An estimate is given for the coupling strength needed to obtain any given number of stable orbits. 
Rui Carvalho (Lab. Mecatronica,DEEC-IST,Lisbon), Bastien Fernandez and   R. Vilela Mendes (Grupo de Fisica-Matematica, UL, L...