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arXiv · 2107.07421

Universal dynamics of a turbulent superfluid Bose gas

A. D. García-Orozco·L. Madeira·M. A. Moreno-Armijos·A. R. Fritsch·P. E. S. Tavares·P. C. M. Castilho·A. Cidrim·G. Roati·V. S. Bagnato
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Abstract

We study the emergence of universal scaling in the time-evolving momentum distribution of a harmonically trapped three-dimensional Bose-Einstein condensate, parametrically driven to a turbulent state. We demonstrate that the out-of-equilibrium dynamics post excitation is described by a single function due to nearby non-thermal fixed points. The observed behavior connects the dynamics of a quantum turbulent state to several far-from-equilibrium phenomena. We present a controllable protocol to explore universality in such systems, obtaining scaling exponents that can serve as reference for future theoretical investigations. Our experimental results thus offer a promising route to investigate the complex dynamics of the quantum turbulent regime under a novel perspective.

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A. D. García-Orozco, L. Madeira, M. A. Moreno-Armijos, A. R. Fritsch, P. E. S. Tavares, P. C. M. Castilho, A. Cidrim, G. Roati, V. S. Bagnato. 2022-08-23. Universal dynamics of a turbulent superfluid Bose gas. https://doi.org/10.1103/physreva.106.023314

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