Mainz 2017 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 36: Rydberg gasses II
A 36.1: Vortrag
Freitag, 10. März 2017, 14:30–14:45, HS 20
Facilitation dynamics and localization phenomena in Rydberg lattice gases with position disorder — Matteo Marcuzzi1,2, •Jiří Minář1,2, Daniel Barredo3, Sylvain de Léséleuc3, Henning Labuhn3, Thierry Lahaye3, Antoine Browaeys3, Emanuele Levi1,2, and Igor Lesanovsky1,2 — 1School of Physics and Astronomy, University of Nottingham, United Kingdom — 2Centre for the Mathematics and Theoretical Physics of Non-equilibrium Quantum Systems, University of Nottingham, United Kingdom — 3Laboratoire Charles Fabry, Institut d’Optique Graduate School, CNRS, Université Paris-Saclay, France
We explore the dynamics of Rydberg excitations in an optical tweezer array under facilitation condition. Due to the finite temperature the atomic positions are randomly spread, an effect that leads to quenched correlated disorder in the interatomic interaction strengths. This drastically affects the facilitation dynamics as we demonstrate experimentally. To shed light on the role of disorder we show that the dynamics is governed by an Anderson-Fock model, i.e. an Anderson model formulated on a lattice with sites corresponding to many-body Fock states. We consider a one-dimensional atom chain and illustrate the effect of disorder experimentally in a situation in which the system maps on a two-dimensional Anderson-Fock model on a trimmed square lattice. We observe a clear suppression of excitation propagation which we ascribe to the localization of the many-body wavefunctions in Hilbert space. [arXiv:1607.06295]