Observation of an inverse turbulent-wave cascade in a driven quantum gas
We observe an inverse turbulent-wave cascade, from small to large length scales, in a driven homogeneous 2D Bose gas. Starting with an equilibrium condensate, we drive the gas isotropically on a length scale much smaller than its size, and observe a nonthermal population of modes with wavelengths la...
Gespeichert in:
| Hauptverfasser: | , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
9 December 2024
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| In: |
Physical review letters
Year: 2024, Jahrgang: 133, Heft: 24, Pages: 1-6 |
| ISSN: | 1079-7114 |
| DOI: | 10.1103/PhysRevLett.133.243402 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevLett.133.243402 Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.133.243402 
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| Verfasserangaben: | Andrey Karailiev, Martin Gazo, Maciej Gałka, Christoph Eigen, Tanish Satoor, and Zoran Hadzibabic |
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| 245 | 1 | 0 | |a Observation of an inverse turbulent-wave cascade in a driven quantum gas |c Andrey Karailiev, Martin Gazo, Maciej Gałka, Christoph Eigen, Tanish Satoor, and Zoran Hadzibabic |
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| 520 | |a We observe an inverse turbulent-wave cascade, from small to large length scales, in a driven homogeneous 2D Bose gas. Starting with an equilibrium condensate, we drive the gas isotropically on a length scale much smaller than its size, and observe a nonthermal population of modes with wavelengths larger than the drive one. At long drive times, the gas exhibits a steady nonthermal momentum distribution. At length scales increasing from the drive one to the system size, this distribution features in turn: (i) a power-law spectrum with an exponent close to the analytical result for a particle cascade in weak-wave turbulence, and (ii) a spectrum reminiscent of a nonthermal fixed point associated with universal coarsening in an isolated 2D gas. In further experiments, based on anisotropic driving, we reveal the complete qualitative picture of how the steady-state cascade forms. | ||
| 700 | 1 | |a Gazo, Martin |e VerfasserIn |4 aut | |
| 700 | 1 | |a Galka, Maciej |e VerfasserIn |0 (DE-588)1358972303 |0 (DE-627)1919307087 |4 aut | |
| 700 | 1 | |a Eigen, Christoph |e VerfasserIn |4 aut | |
| 700 | 1 | |a Satoor, Tanish |e VerfasserIn |4 aut | |
| 700 | 1 | |a Hadzibabic, Zoran |e VerfasserIn |4 aut | |
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