2.3.7 Acceleration methods: Victora and Voter methods

In the following sections two different methods to extend the simulation time scale will be analyzed. The methods consists of the extrapolation of Langevin dynamics obtained in a short simulated time to a longer interval. Both methods need additional simulations and the effort of these simulations will determine the real performance of the method. This is specially true in the case of Voter method. We have checked in both cases the validity of the extrapolation in some simple cases.