Energy spectra and cascade in the spin turbulence of a driven spinor Bose-Einstein condensate
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2026
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| _version_ | 1866916070685671424 |
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| author | Lee, Junghoon Kim, Jongmin Lee, Donggyu Shin, Yong-il |
| author_facet | Lee, Junghoon Kim, Jongmin Lee, Donggyu Shin, Yong-il |
| contents | We investigate the spin-interaction energy spectrum of spin turbulence in a driven spinor Bose-Einstein condensate. Continuous spin driving of a spin-1 condensate produces a nonequilibrium steady state with spatially fluctuating magnetization. We observe a power-law scaling consistent with the $-7/3$ exponent predicted for spin-wave turbulence, which persists across our full range of drive strengths despite substantial changes in the spectral anisotropy. After switching off the drive, we track the free-decay evolution and find evidence consistent with a direct cascade of spin-interaction energy toward higher wavenumbers. These results establish an energy-spectral hallmark of spin turbulence and enable quantitative studies of cascade dynamics in spinor superfluids. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2606_00766 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Energy spectra and cascade in the spin turbulence of a driven spinor Bose-Einstein condensate Lee, Junghoon Kim, Jongmin Lee, Donggyu Shin, Yong-il Quantum Gases Fluid Dynamics We investigate the spin-interaction energy spectrum of spin turbulence in a driven spinor Bose-Einstein condensate. Continuous spin driving of a spin-1 condensate produces a nonequilibrium steady state with spatially fluctuating magnetization. We observe a power-law scaling consistent with the $-7/3$ exponent predicted for spin-wave turbulence, which persists across our full range of drive strengths despite substantial changes in the spectral anisotropy. After switching off the drive, we track the free-decay evolution and find evidence consistent with a direct cascade of spin-interaction energy toward higher wavenumbers. These results establish an energy-spectral hallmark of spin turbulence and enable quantitative studies of cascade dynamics in spinor superfluids. |
| title | Energy spectra and cascade in the spin turbulence of a driven spinor Bose-Einstein condensate |
| topic | Quantum Gases Fluid Dynamics |
| url | https://arxiv.org/abs/2606.00766 |