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arXiv · 2203.09514

Emergence of isotropy and dynamic scaling in 2D wave turbulence in a homogeneous Bose gas

Maciej Gałka·Panagiotis Christodoulou·Martin Gazo·Andrey Karailiev·Nishant Dogra·Julian Schmitt·Zoran Hadzibabic
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Abstract

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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Maciej Gałka, Panagiotis Christodoulou, Martin Gazo, Andrey Karailiev, Nishant Dogra, Julian Schmitt, Zoran Hadzibabic. 2022-03-17. Emergence of isotropy and dynamic scaling in 2D wave turbulence in a homogeneous Bose gas. https://doi.org/10.1103/physrevlett.129.190402

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