Emergence of isotropy and dynamic scaling in 2D wave turbulence in a homogeneous Bose gas
arXiv:2203.09514 · doi:10.1103/PhysRevLett.129.190402
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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