DISTRIBUTION OF POSTCRITICALLY FINITE POLYNOMIALS II: SPEED OF CONVERGENCE

In the moduli space of degree d polynomials, we prove the equidistribution of postcritically finite polynomials toward the bifurcation measure. More precisely, using complex analytic arguments and pluripotential theory, we prove the exponential speed of convergence for C-2-observables. This improves results obtained with arithmetic methods by Favre and Rivera-Letellier in the unicritical family and Favre and the first author in the space of degree d polynomials. We deduce from that the equidistribution of hyperbolic parameters with (d - 1) distinct attracting cycles of given multipliers toward the bifurcation measure with exponential speed for C-1-observables. As an application, we prove the equidistribution (up to an explicit extraction) of parameters with (d - 1) distinct cycles with prescribed multiplier toward the bifurcation measure for any (d - 1) multipliers outside a pluripolar set.