Resonances for the AC-Stark effect

Correlation functions and the AC Stark effect ?

We present a Heisenberg picture QED treatment of the resonance fluorescence of a two-level atom. It is shown that the equations of motion for first-order correlation functions have an asymmetry with respect to the two time arguments. This asymmetry arises in a correct and careful evaluation of the unequal-time commutator between free-field and atomic operators. General solutions of these equati...

Higher-order resonances in a Stark decelerator

Fractal stabilization of Wannier-Stark resonances

– The quasienergy spectrum of a Bloch electron affected by dc-ac fields is known to have a fractal structure as function of the so-called electric matching ratio, which is the ratio of the ac field frequency and the Bloch frequency. This paper studies a manifestation of the fractal nature of the spectrum in the system “atom in a standing laser wave”, which is a quantum optical realization of a ...

The Mixing of Metastable States of Barium Atoms Induced by the ac Stark Effect

We present the results of experimental investigations of atoms perturbed by laser radiation under conditions when the energy of a Stark-shifted level becomes close to the energy of a neighboring level. © 2000 MAIK “Nauka/Interperiodica”. PACS numbers: 32.60.+i, 32.80.–t 1 This paper presents the results of experimental studies of atoms perturbed by laser radiation under conditions when the chan...

Lifetime of the Wannier-Stark resonances and perturbation theory

We consider the small field asymptotics of the ladder lifetime for a single ladder model. Using the convergent perturbation series, we prove that the behavior of the lifetime computed by means of the Fermi Golden Rule is proportional to the correct one with the factor ( π 3 )2 . The relation with usual adiabatic problems is briefly discussed.