Bulletin of the American Physical Society
55th Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Monday–Friday, June 3–7, 2024; Fort Worth, Texas
Session K00: Poster Session II (4pm-6pm CDT)
4:00 PM,
Wednesday, June 5, 2024
Room: Hall BC
Abstract: K00.00108 : Nonequilibrium phase transitions on a dynamical network: Self-Organized Criticality and Anomalous Percolation in a Rydberg facilitated gas*
Presenter:
Simon Ohler
(University of Kaiserslautern-Landau)
Authors:
Simon Ohler
(University of Kaiserslautern-Landau)
Daniel Brady
(University of Kaiserslautern)
Michael Fleischhauer
(University of Kaiserslautern-Landau)
We study the behavior of the Rydberg gas numerically close to the critical point and obtain several of the critical exponents that characterize the transition. We show that the existence of a critical point and the universal behavior near that point are strongly influenced by the network character of the facilitation process in a gas and by atomic motion.
Considering the frozen gas limit as well as the high-temperature case, we show how the temperature of the gas changes the universality class.
Specifically, we observe evidence for anomalous directed percolation caused by long-range excitation processes (Lévy-flights) with continuously varying critical exponents. Furthermore we predict avalanche events with the same power-law distribution as found in the first works on SOC by Bak, Tang and Wiesenfeld [Phys. Rev. Lett. 59, 381 (1987)].
*The authors gratefully acknowledge financial support from the DFG through SFB TR 185, project number 277625399.
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