تقرير
Annular Vortex Chain in a Resonantly Pumped Polariton Superfluid
| العنوان: | Annular Vortex Chain in a Resonantly Pumped Polariton Superfluid |
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| المؤلفون: | Boulier, T., Terças, H., Solnyshkov, D. D., Glorieux, Q., Giacobino, E., Malpuech, G., Bramati, A. |
| المصدر: | Scientific Reports volume 5, 9230 (2015) |
| سنة النشر: | 2014 |
| المجموعة: | Condensed Matter Quantum Physics |
| مصطلحات موضوعية: | Condensed Matter - Other Condensed Matter, Condensed Matter - Quantum Gases, Quantum Physics |
| الوصف: | We report the formation of a ring-shaped array of vortices after injection of angular momentum in a polariton superfluid. The angular momentum is injected by a $\ell= 8$ Laguerre-Gauss beam, whereas the global rotation of the fluid is hindered by a narrow Gaussian beam placed at its center. In the linear regime a spiral interference pattern containing phase defects is visible. In the nonlinear (superfluid) regime, the interference disappears and the vortices nucleate as a consequence of the angular momentum quantization. The radial position of the vortices evolves freely in the region between the two pumps as a function of the density. Hydrodynamic instabilities resulting in the spontaneous nucleation of vortex-antivortex pairs when the system size is sufficiently large confirm that the vortices are not constrained by interference when nonlinearities dominate the system. Comment: 5 pages, 5 figures, submitted to PRL |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1038/srep09230 |
| URL الوصول: | http://arxiv.org/abs/1405.1375 |
| رقم الأكسشن: | edsarx.1405.1375 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1038/srep09230 |
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