Quantum revivals in a periodically driven gravitational cavity

Quantum revivals are investigated for the dynamics of an atom in a driven g ravitational cavity. It is demonstrated that the external driving field inf luences the revival time significantly. Analytical expressions are presente d which are based on second-order perturbation theory and semiclassical sec ular theory. These analytical results explain the dependence of the revival time on the characteristic parameters of the problem quantitatively in a s imple way. They are in excellent agreement with numerical results.