Diffusive to Nonergodic Dipolar Transport in a Dissipative Atomic Medium

authored by: 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.
Organisation(s): Institute of Theoretical Physics
QuantumFrontiers
CRC 1227 Designed Quantum States of Matter (DQ-mat)
External Organisation(s): Heidelberg University
University of Strasbourg
University of Science and Technology of China
Type: Article
Journal: Physical review letters
Volume: 123
ISSN: 0031-9007
Publication date: 11.2019
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Physics and Astronomy(all)
Electronic version(s): https://doi.org/10.48550/arXiv.1809.07532 (Access: Open)
https://doi.org/10.1103/PhysRevLett.123.213606 (Access: Closed)

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",
}