Observation of Scaling Behavior of Spin Turbulence in Spinor Bose-Einstein Condensates

In this poster, we present the observation of scaling behaviors in spin turbulence within a spinor Bose-Einstein condensate (BEC). An antiferromagnetic spin-1 BEC is prepared in an oblate optical dipole trap, featuring effectively two dimensional spin excitations. By driving chaotic spin dynamics in this spin-1 BEC, complex spin textures are generated accompanied by turbulent mass flow. Through in-situ spin-selective imaging of these textures, we obtain the spin energy power spectrum. The spectrum exhibits two distinct scaling regions characterized by exponents of -1 and -7/3. These scaling laws are distinct from those of the kinetic energy spectrum in conventional turbulence and are well-described by the spin hydrodynamic equations of the antiferromagnetic spin-1 BEC. Furthermore, this scaling behavior appears universal even as the quadratic Zeeman energy, which determines the system’s nematic anisotropy, is varied.