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Facilitation dynamics and localization phenomena in Rydberg lattice gases with position disorder

Authors

Daniel Barredo

Sylvain de

Hening Labuhn

Thierry Lahaye

Antoine Browaeys

Emanuele Levi



Abstract

We explore the dynamics of Rydberg excitations in an optical tweezer array under anti-blockade (or facilitation) conditions. 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 on the elementary example of two atoms. To shed light on the role of disorder in a many-body setting we show that here 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 first consider a one-dimensional atom chain in a limit which is described by a one-dimensional Anderson-Fock model with disorder on every other site, featuring both localized and delocalized states. We then 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.

Citation

Marcuzzi, M., Minář, J., Barredo, D., Léséleuc, S. D., Labuhn, H., Lahaye, T., …Lesanovsky, I. (2017). Facilitation dynamics and localization phenomena in Rydberg lattice gases with position disorder. Physical Review Letters, 118(6-10), Article 063606. https://doi.org/10.1103/PhysRevLett.118.063606

Journal Article Type Article
Acceptance Date Jan 12, 2017
Publication Date Feb 10, 2017
Deposit Date Mar 14, 2017
Publicly Available Date Mar 14, 2017
Journal Physical Review Letters
Print ISSN 0031-9007
Electronic ISSN 1079-7114
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 118
Issue 6-10
Article Number 063606
DOI https://doi.org/10.1103/PhysRevLett.118.063606
Public URL https://nottingham-repository.worktribe.com/output/846504
Publisher URL http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.118.063606
Additional Information ©2017 American Physical Society

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