Geometric theory of Stark resonances in multielectron systems

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.

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 ...

Stark resonances in 2-dimensional curved quantum waveguides

In this paper we study the influence of an electric field on a two dimensional waveguide. We show that bound states that occur under a geometrical deformation of the guide turn into resonances when we apply an electric field of small intensity having a nonzero component on the longitudinal direction of the system.

Blackbody-radiation-induced resonances between Rydberg-Stark states of Na

We report on measurements of the population of Rydberg states of Na in a constant electric field that result when 300-K blackbody radiation induces transitions from initial states with umu50,1 to neighboring states. Our measurements included comprehensive ranges of initial states (ni*524–29!, repopulation times (td50–50 ms!, and fields (Fs5175–712 V/cm!. We find that the population is redistrib...