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arXiv 2602.06131cond-mat.quant-gascond-mat.stat-mechphysics.atom-phquant-ph
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二维湍流玻色气体的非平衡方程状态

A Nonequilibrium Equation of State for a Turbulent 2D Bose Gas

Cavendish Laboratory, University of Cambridge(剑桥大学卡文迪许实验室)

Yi Jiang, Nikolai Maslov, Andrey Karailiev, Christoph Eigen, Martin Gazo, Zoran Hadzibabic

AI总结:

本研究通过实验构建了二维湍流玻色气体的非平衡方程状态,揭示了非热但稳定的幂律动量分布与标度不变能量通量的关系。

摘要:

非平衡方程状态可以为远离平衡系统提供有效的热力学类描述。我们实验性地构建了一个方程,用于描述湍流二维玻色气体中的直接能量级联。我们的均匀气体在大尺度上持续驱动,并在小尺度上匹配耗散,表现出非热但稳定的幂律动量分布。该方程状态将级联幅度与底层标度不变的能量通量联系起来,并且可以使用与格鲁斯-皮塔耶夫斯基模型一致的标度关系,根据不同的驱动强度、气体密度和相互作用强度,转换为通用的幂律形式。

英文摘要:

Nonequilibrium equations of state can provide an effective thermodynamic-like description of far-from-equilibrium systems. We experimentally construct such an equation for a direct energy cascade in a turbulent two-dimensional Bose gas. Our homogeneous gas is continuously driven on a large length scale and, with matching dissipation on a small length scale, exhibits a nonthermal but stationary power-law momentum distribution. Our equation of state links the cascade amplitude with the underlying scale-invariant energy flux, and can, for different drive strengths, gas densities, and interaction strengths, be recast into a universal power-law form using scalings consistent with the Gross-Pitaevskii model.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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