تقرير
Comment on 'Linear wave dynamics explains observations attributed to dark-solitons in a polariton quantum fluid'
| العنوان: | Comment on 'Linear wave dynamics explains observations attributed to dark-solitons in a polariton quantum fluid' |
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| المؤلفون: | Amo, A., Bloch, J., Bramati, A., Carusotto, I., Ciuti, C., Deveaud-Plédran, B., Giacobino, E., Grosso, G., Kamchatnov, A., Malpuech, G., Pavloff, N., Pigeon, S., Sanvitto, D., Solnyshkov, D. D. |
| المصدر: | Phys. Rev. Lett. 115, 089401 (2015) |
| سنة النشر: | 2014 |
| المجموعة: | Condensed Matter Physics (Other) |
| مصطلحات موضوعية: | Physics - Optics, Condensed Matter - Quantum Gases |
| الوصف: | In a recent preprint (arXiv:1401.1128v1) Cilibrizzi and co-workers report experiments and simulations showing the scattering of polaritons against a localised obstacle in a semiconductor microcavity. The authors observe in the linear excitation regime the formation of density and phase patterns reminiscent of those expected in the non-linear regime from the nucleation of dark solitons. Based on this observation, they conclude that previous theoretical and experimental reports on dark solitons in a polariton system should be revised. Here we comment why the results from Cilibrizzi et al. take place in a very different regime than previous investigations on dark soliton nucleation and do not reproduce all the signatures of its rich nonlinear phenomenology. First of all, Cilibrizzi et al. consider a particular type of radial excitation that strongly determines the observed patterns, while in previous reports the excitation has a plane-wave profile. Most importantly, the nonlinear relation between phase jump, soliton width and fluid velocity, and the existence of a critical velocity with the time-dependent formation of vortex-antivortex pairs are absent in the linear regime. In previous reports about dark soliton and half-dark soliton nucleation in a polariton fluid, the distinctive dark soliton physics is supported both by theory (analytical and numerical) and experiments (both continuous wave and pulsed excitation). Comment: 4 pages, 2 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevLett.115.089401 |
| URL الوصول: | http://arxiv.org/abs/1401.7347 |
| رقم الأكسشن: | edsarx.1401.7347 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevLett.115.089401 |
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