Closure of the Monte Carlo dynamical equations in the spherical Sherrington-Kirkpatrick model.

We study the analytical solution of the Monte Carlo dynamics in the spherical Sherrington-Kirkpatrick model using the technique of the generating function. Explicit solutions for one-time observables ~like the energy! and two-time observables ~like the correlation and response function! are obtained. We show that the crucial quantity which governs the dynamics is the acceptance rate. At zero temperature, an adiabatic approximation reveals that the relaxational behavior of the model corresponds to that of a single harmonic oscillator with an effective renormalized mass. @S0163-1829~96!00129-4#