Interaction effects on dynamical localization in driven helium

Abstract

Dynamical localization prevents driven atomic systems from fast fragmentation by hampering the excitation process. We present numerical simulations within a collinear model of microwave-driven helium Rydberg atoms and prove that dynamical localization survives the impact of electron-electron interaction, even for doubly excited states in the presence of fast autoionization. We conclude that the effect of electron-electron repulsion on localization can be described by an appropriate rescaling of the atomic level density and of the external field with the strength of the interaction.

5 pages, 4 figures

References in corpus (4)

• Direct observation of Anderson localization of matter-waves in a controlled disorder
• Localization of ultrasound in a three-dimensional elastic network
• Exploring the phase space of the quantum delta kicked accelerator
• Microwave-Driven Atoms: From Anderson Localization to Einstein's Photoeffect

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• The Spectral Backbone of Excitation Transport in Ultra-Cold Rydberg Gases
• A Statistical Theory of Designed Quantum Transport Across Disordered Networks
• Extracting partial decay rates of helium from complex rotation: autoionizing resonances of the one-dimensional configurations