Rostock 2019 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
A: Fachverband Atomphysik
A 11: Ultra-cold plasmas and Rydberg systems
A 11.8: Poster
Dienstag, 12. März 2019, 16:30–18:30, S Fobau Physik
Dissipative dynamics of strongly interacting driven Rydberg gases — •Carsten Lippe1, Tanita Eichert1, Jana Bender1, Erik Bernhart1, Oliver Thomas1,2, Thomas Niederprüm1, Fabian Letscher1,2, Michael Fleischhauer1, and Herwig Ott1 — 1Department of Physics and research center OPTIMAS, Technische Universität Kaiserslautern, Germany — 2Graduate School Materials Science in Mainz, Gottlieb-Daimler-Strasse 47, 67663 Kaiserslautern, Germany
We investigate the dynamics of Rydberg blockade and facilitation by continuously driving open Rydberg many-body systems in different spatial configurations.
We discuss the facilitation dynamics of an off-resonantly driven 3-dimensional lattice gas in a Mott insulator state with single site occupancy in the regime of strong decoherence. Our experimental results give evidence for the formation of finite-sized Rydberg excitation clusters in the steady state. A scaling analysis with a numerical rate-equation model provides evidence against the existence of a global bistable phase because finite correlation lenghts of Rydberg excitations suggest that many small Rydberg clusters form.
Furthermore, we discuss the dynamics and steady states of a system of mesoscopic Rydberg blockaded clouds loaded into a 1-dimensional optical lattice with a lattice constant equal to the facilitation radius. Each cloud represents an effective two-level system with an asymmetric excitation and deexcitation rate, a so-called superatom. Thus, a chain of superatoms is a realization of a dissipative Ising-like spin model.