Spin turbulence in spinor Bose-Einstein condensates

22nd International Laser Physics Workshop

Tsubota, Makoto^1 ; Fujimoto, Kazuya^1

Department of Physics, Osaka City University, Osaka 558-8585, Japan^1

关键词: Antiferromagnetics;    Bose-Einstein condensates;    Hydrodynamic instabilities;    Kolmogorov;    Quantum fluids;    Spin densities;    Spin-dependent interactions;    Spin-glass-like behaviors;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/497/1/012002/pdf
DOI  :  10.1088/1742-6596/497/1/012002

来源: IOP

【 摘 要 】

We summarize the recent theoretical and numerical works on spin turbulence (ST) in spin-1 spinor Bose-Einstein condensates. When the system is excited from the ground state, it goes through hydrodynamic instability to ST in which the spin density vector has various disordered direction. The properties of ST depend on whether the spin-dependent interaction is ferromagnetic or antiferromagnetic. ST has some characteristics different from other kinds of turbulence in quantum fluids. Firstly, the spectrum of the spin-dependent interaction energy exhibits the characteristic power law different from the usual Kolmogorov -5/3 law. Secondly, ST can show the spin-glass-like behavior; the spin density vectors are spatially random but temporally frozen.