We present analytical and numerical results on the mechanism of excitation and ionization
of hydrogen atoms under microwave fields. In particular we predict the existence of a critical …

In the semiclassical limit, quantum mechanics shows differences between classically
integrable abd chaotic systems. Here we review recent developments in this field. Topics …

Over the past two decades scientists, mathematicians, and engineers have come to
understand that a large variety of systems exhibit complicated evolution with time. This …

Graduate Texts in Physics publishes core learning/teaching material for graduateand
advanced-level undergraduate courses on topics of current and emerging fields within …

With a classical ensemble model that includes electron correlations during the whole
ionization process, we investigate strong-field sequential double ionization of Ar by …

We present experimental and theoretical results on highly excited Rydberg atoms passing
through a waveguide. The waveguide is excited in a coherent mode with a superimposed …

With the exception of the harmonic oscillator, quantum wave packets usually spread as time
evolves. This is due to the non-linear character of the classical equations of motion which …

We report the first measurements of microwave excitation and ionization of excited hydrogen
atoms for scaled frequencies n 0 3 ω up to 2.8. Classical 3D calculations which directly …

We have excited and detected an atomic electron wave packet that is localized in the polar
and azimuthal angles. The wave packet is formed through the coherent superposition of …

The quantum localization phenomenon that strongly limits any quantum process of diffusive
ionization that may be started in systems subjected to a periodic perturbation is discussed. In …