Diffusive to Nonergodic Dipolar Transport in a Dissipative Atomic Medium

verfasst von: S. Whitlock, H. Wildhagen, H. Weimer, M. Weidemüller
Abstract: We investigate the dipole-mediated transport of Rydberg impurities through an ultracold gas of atoms prepared in an auxiliary Rydberg state. In one experiment, we continuously probe the system by coupling the auxiliary Rydberg state to a rapidly decaying state that realizes a dissipative medium. In situ imaging of the impurities reveals diffusive spreading controlled by the intensity of the probe laser. By preparing the same density of hopping partners, but then switching off the dressing fields, the spreading is effectively frozen. This is consistent with numerical simulations, which indicate the coherently evolving system enters a nonergodic extended phase. This opens the way to study transport and localization phenomena in systems with long-range hopping and controllable dissipation.
Organisationseinheit(en): Institut für Theoretische Physik
QuantumFrontiers
SFB 1227: Designte Quantenzustände der Materie (DQ-mat)
Externe Organisation(en): Ruprecht-Karls-Universität Heidelberg
Université de Strasbourg
University of Science and Technology of China
Typ: Artikel
Journal: Physical review letters
Band: 123
ISSN: 0031-9007
Publikationsdatum: 11.2019
Publikationsstatus: Veröffentlicht
Peer-reviewed: Ja
ASJC Scopus Sachgebiete: Physik und Astronomie (insg.)
Elektronische Version(en): https://doi.org/10.48550/arXiv.1809.07532 (Zugang: Offen)
https://doi.org/10.1103/PhysRevLett.123.213606 (Zugang: Geschlossen)

BibTeX

@article{80eb888e94264a5b95a0ad4542241b7a,
title = "Diffusive to Nonergodic Dipolar Transport in a Dissipative Atomic Medium",
abstract = "We investigate the dipole-mediated transport of Rydberg impurities through an ultracold gas of atoms prepared in an auxiliary Rydberg state. In one experiment, we continuously probe the system by coupling the auxiliary Rydberg state to a rapidly decaying state that realizes a dissipative medium. In situ imaging of the impurities reveals diffusive spreading controlled by the intensity of the probe laser. By preparing the same density of hopping partners, but then switching off the dressing fields, the spreading is effectively frozen. This is consistent with numerical simulations, which indicate the coherently evolving system enters a nonergodic extended phase. This opens the way to study transport and localization phenomena in systems with long-range hopping and controllable dissipation.",
author = "S. Whitlock and H. Wildhagen and H. Weimer and M. Weidem{\"u}ller",
year = "2019",
month = nov,
doi = "10.48550/arXiv.1809.07532",
language = "English",
volume = "123",
journal = "Physical review letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "21",
}