Universal coarsening in a homogeneous two-dimensional Bose gas

• 成果类型: Article
• 署名作者: Gazo, Martin; Karailiev, Andrey; Satoor, Tanish; Eigen, Christoph; Galka, Maciej; Hadzibabic, Zoran
• 署名单位: University of Cambridge; Ruprecht Karls University Heidelberg
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-9100
• DOI: 10.1126/science.ado3487
• 发表日期: 2025-08-21
• 页码: 802-805
• 关键词: dynamics; turbulence

摘要

Coarsening of an isolated far-from-equilibrium quantum system is a paradigmatic many-body phenomenon, relevant from subnuclear to cosmological length scales and predicted to feature universal dynamic scaling. Here, we observed universal scaling in the coarsening of a homogeneous two-dimensional Bose gas, with exponents that match analytical predictions. For different initial states, we reveal universal scaling in the experimentally accessible finite-time dynamics by elucidating and accounting for the initial-state-dependent prescaling effects. The methods we introduce allow direct comparison between cold-atom experiments and nonequilibrium field theory and are applicable to any study of universality far from equilibrium.