title: Electric quantum walks with individual atoms.
abstract: We report on the experimental realization of electric quantum walks, which mimic the effect of an electric field on a charged particle in a lattice. Starting from a textbook implementation of discrete-time quantum walks, we introduce an extra operation in each step to implement the effect of the field. The recorded dynamics of such a quantum particle exhibits features closely related to Bloch oscillations and interband tunneling. In particular, we explore the regime of strong fields, demonstrating contrasting quantum behaviors: quantum resonances versus dynamical localization depending on whether the accumulated Bloch phase is a rational or irrational fraction of 2π.
authors.affiliation: Institut für Angewandte Physik, Universität Bonn, Wegelerstrasse 8, D-53115 Bonn, Germany.
authors.forename: Maximilian
authors.initials: M
authors.lastname: Genske
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Alt
authors.forename: Andreas
authors.initials: A
authors.lastname: Steffen
authors.forename: Albert H
authors.initials: AH
authors.lastname: Werner
authors.forename: Reinhard F
authors.initials: RF
authors.lastname: Werner
authors.forename: Dieter
authors.initials: D
authors.lastname: Meschede
authors.forename: Andrea
authors.initials: A
authors.lastname: Alberti