Quantum stochastic resonance in the strong-field limit

The behavior of a dissipative two-level system driven by a strong monochromatic oscillatory field is discussed. The numerical path integral calculations are performed for this purpose. It is found that at weak dissipation and low temperature, the population of an initially localized state displays persistent high-frequency oscillations. As the field parameters are varied, the oscillation amplitudes exhibit intricate patterns. The results show that outside the weak-field regime, this behavior is an extension of the quantum stochastic resonance phenomenon.