Abstract:We have derived the autocorrelation function for the field emitted by a Rydberg atom in a micocavity weakly excited in the strong coupling regime and in the non-resonant case. We propose simple analytical expressions and make use of them to determine the atomic frequency and the mean radiative lifetime of the Rydberg atom. As compared to direct measurements this method is promising.

We consider a highly excited atom in a good cavity strongly pumped by coherent light. We derive the autocorrelation function of the field emergent from the cavity. We show that the autocorrelation function can be expressed in terms of the atomic dissipation rate. In order to distinguish between the resonant and the non-resonant case, we introduce a parameter interpreted as the measure of the relative detuning between the pump laser and the excited atom frequency. By selecting the parameter time, we determine the lifetime of the excited atom. This method constitutes an interesting alternative for internal atomic parameter determination.

We use atomic supersymmetry approximation of Rubidium Rydberg states wave function. Accordingly, eigenstates are interpreted as the implementation of broken symmetry and depend on two parameters. We determine the parameter values from spectroscopic measurements of energies and lifetimes. These analytical wave functions allowed us the study of thermal energy Rb(nl) and the collisions where nl is ns, np and nd over a wide range of n values. The total cross sections are in fair agreement and closer to measurements than similar approaches based on hydrogenic representation of the wave function.