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Observation of two non-thermal fixed points for the same microscopic symmetry

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arxiv 2306.16497 v1 pith:O2RUORC3 submitted 2023-06-28 cond-mat.quant-gas

Stefan Lannig , Maximilian Prüfer , Yannick Deller , Ido Siovitz , Jan Dreher , Thomas Gasenzer , Helmut Strobel , Markus K. Oberthaler This is my paper · ORCID
classification cond-mat.quant-gas
keywords universaldifferentequilibriumfixednon-thermalpointsassociateddynamics
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Close to equilibrium, the underlying symmetries of a system determine its possible universal behavior. Far from equilibrium, however, different universal phenomena associated with the existence of multiple non-thermal fixed points can be realized for given microscopic symmetries. Here, we study this phenomenon using a quasi-one-dimensional spinor Bose-Einstein condensate. We prepare two different initial conditions and observe two distinct universal scaling dynamics with different exponents. Measurements of the complex-valued order parameter with spatial resolution allow us to characterize the phase-amplitude excitations for the two scenarios. Our study provides new insights into the phenomenon of universal dynamics far from equilibrium and opens a path towards mapping out the associated basins of non-thermal fixed points.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Quasinormal modes of nonthermal fixed points

    hep-th 2025-02 conditional novelty 8.0 of 10

    Perturbations around nonthermal fixed points obey a quasinormal-mode eigenvalue problem, and for a Fokker-Planck collision kernel the spectrum is a tower of purely imaginary frequencies.

  2. Universal non-thermal fixed point for quasi-1D Bose gases

    cond-mat.quant-gas 2025-05 conditional novelty 7.0 of 10

    A strongly interacting quasi-1D molecular Bose gas relaxes with the same self-similar scaling exponents and universal function as a weakly interacting atomic gas, pointing to a common non-thermal fixed point.

  3. Attractodynamics in 0+1D

    hep-ph 2026-07 conditional novelty 6.0 of 10

    Attractodynamics constructs a macroscopic closure around a nonthermal attractor; in the 0+1D BSY kinetic model, ideal and viscous truncations track the full kinetic evolution, with the viscous extension improving agre...

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