Eur. Phys. J. B 46, 515-518 (2005)
https://doi.org/10.1140/epjb/e2005-00282-4

Microwave control of transport through a chaotic mesoscopic dot

¹ Physics Department, Faculty of Mathematics and Physics, University of Ljubljana, Ljubljana, Slovenia
² Laboratoire de Physique Théorique, UMR 5152 du CNRS, Univ. P. Sabatier, 31062 Toulouse Cedex 4, France

Received: 12 May 2005
Revised: 27 June 2005
Published online: 7 September 2005

Abstract

We establish analogy between a microwave ionization of Rydberg atoms and a charge transport through a chaotic quantum dot induced by a monochromatic field in a regime with a potential barrier between dot contacts. We show that the quantum coherence leads to dynamical localization of electron excitation in energy so that only a finite number of photons is absorbed inside the dot. The theory developed determines the dependence of localization length on dot and microwave parameters showing that the microwave power can switch the dot between metallic and insulating regimes. ultiphoton ionization and excitation to highly excited states (e.g., Rydberg states)