均匀玻色气体中二维波湍流的各向同性涌现与动态标度
Emergence of isotropy and dynamic scaling in 2D wave turbulence in a homogeneous Bose gas
AI总结:
该研究在均匀二维玻色气体中观测波激发湍流级联,通过全尺度刻画揭示各向同性涌现与耗散前的动态时空标度。
摘要:
我们在均匀二维玻色气体中实现了波激发的湍流级联,并在所有相关时间和长度尺度上探测其如何从小动量向大动量建立,直至系统达到能量注入与耗散相匹配的稳态。这种全尺度视角直接揭示了理论预期的湍流形成两大基石:各向异性驱动下动量空间统计各向同性的涌现,以及任何能量发生耗散之前动量分布的时空标度。
英文摘要:
We realise a turbulent cascade of wave excitations in a homogeneous 2D Bose gas, and probe on all relevant time and length scales how it builds up from small to large momenta, until the system reaches a steady state with matching energy injection and dissipation. This all-scales view directly reveals the two theoretically expected cornerstones of turbulence formation -- the emergence of statistical momentum-space isotropy under anisotropic forcing, and the spatiotemporal scaling of the momentum distribution at times before any energy is dissipated.
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