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Hydrodynamic stabilization of self-organized criticality in a driven Rydberg gas

Klocke, K. and Wintermantel, T. M. and Lochead, G. and Whitlock, S. and Buchhold, M. (2020) Hydrodynamic stabilization of self-organized criticality in a driven Rydberg gas. . (Unpublished)

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Signatures of self-organized criticality (SOC) have recently been observed in an ultracold atomic gas under continuous laser excitation to strongly-interacting Rydberg states [S. Helmrich et al., Nature, 577, 481--486 (2020)]. This creates a unique possibility to study this intriguing dynamical phenomenon, e.g., to probe its robustness and universality, under controlled experimental conditions. Here we examine the self-organizing dynamics of a driven ultracold gas and identify an unanticipated feedback mechanism, which is especially important for systems coupled to thermal baths. It sustains an extended critical region in the trap center for a notably long time via hydrodynamic transport of particles from the flanks of the cloud toward the center. This compensates the avalanche-induced atom loss and leads to a characteristic flat-top density profile, providing an additional experimental signature for SOC and minimizing effects of inhomogeneity on the SOC features.

Item Type:Report or Paper (Discussion Paper)
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URLURL TypeDescription Paper
Klocke, K.0000-0002-9580-8509
Buchhold, M.0000-0001-5194-9388
Additional Information:K.K. acknowledges support from the National Science Foundation through grant DMR-1723367. T.M.W. acknowledges the French National Research Agency (ANR) through the Programme d’Investissement d’Avenir under contract ANR-17-EURE-0024. This project is part of and supported by DFG SPP 1929 GiRyd through projects DI1745/2-1 and WH141/3-3. S.W. is supported by the ‘Investissements d’Avenir’ programme through the Excellence Initiative of the University of Strasbourg (IdEx) and the University of Strasbourg Institute for Advanced Study (USIAS). M.B. acknowledges support from the Alexander von Humboldt foundation.
Group:Institute for Quantum Information and Matter
Funding AgencyGrant Number
Agence Nationale pour la Recherche (ANR)ANR-17-EURE-0024
Deutsche Forschungsgemeinschaft (DFG)SPP 1929
Deutsche Forschungsgemeinschaft (DFG)DI1745/2-1
Deutsche Forschungsgemeinschaft (DFG)WH141/3-3
University of StrasbourgUNSPECIFIED
Alexander von Humboldt FoundationUNSPECIFIED
Record Number:CaltechAUTHORS:20201019-095613586
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:106139
Deposited By: Tony Diaz
Deposited On:20 Oct 2020 17:52
Last Modified:19 Nov 2020 00:20

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