Vortices in Polariton OPO Superfluids

Vortices in Polariton OPO Superfluids
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Polariton OPO 超流体中的涡流

DOI:
10.1007/978-3-642-24186-4_6
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发表时间:
2011
期刊:
arXiv: Mesoscale and Nanoscale Physics
影响因子:
--
通讯作者:
M. Szymańska
M. Szymańska
中科院分区:
--
文献类型:
--
作者:
F. Marchetti;M. Szymańska

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本章回顾了极化子流体中量子化涡流的发生,主要是当极化子在光参量振荡器(OPO)状态下驱动时。我们首先回顾 OPO 物理及其分析和数值建模,后者对于描述有限尺寸系统是必要的。模式形成在远离平衡的系统中是典型的。类似地,我们发现均匀 OPO 解对于量子化涡旋的自发形成可能不稳定。然而,亚稳态涡流只能从外部注入稳定的对称状态,并且它们的持续存在是由于 OPO 超流体特性。我们讨论了 OPO 的电流如何在亚稳态和自发涡旋的发生和动力学中发挥至关重要的作用。
This chapter reviews the occurrence of quantised vortices in polariton fluids, primarily when polaritons are driven in the optical parametric oscillator (OPO) regime. We first review the OPO physics, together with both its analytical and numerical modelling, the latter being necessary for the description of finite size systems. Pattern formation is typical in systems driven away from equilibrium. Similarly, we find that uniform OPO solutions can be unstable to the spontaneous formation of quantised vortices. However, metastable vortices can only be injected externally into an otherwise stable symmetric state, and their persistence is due to the OPO superfluid properties. We discuss how the currents characterising an OPO play a crucial role in the occurrence and dynamics of both metastable and spontaneous vortices.
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