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arXiv 1905.09092cond-mat.mes-hall
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时间延迟极化

Time-Delay Polaritonics

Julian D. Töpfer, Helgi Sigurdsson, Lucinda Pickup, Pavlos G. Lagoudakis

摘要:

非线性和有限信号传播速度在自然界、技术和现实问题中无处不在,因此迫切需要有效的方法来描述和预测这些元素的影响。工程凝聚态系统的进展,如被困凝聚物的晶格,使研究非线性效应的多体系统,其中交换的粒子之间的晶格节点是有效的瞬时。在这里,我们展示了一个制度的宏观物质波系统,其中弹道膨胀的凝聚体的微腔激子极化激元作为皮秒,微尺度的非线性振荡器受时间延迟的相互作用。容易的光学控制和读出的极化激元凝聚体使我们能够探索两个相互作用的凝聚体的相空间,以宏观距离突出其在扩展配置的潜力。我们证明了确定性的耦合冷凝系统之间的不动点和极限环制度,这是完全复制的时间延迟耦合运动方程类似的朗-小林方程。

英文摘要:

Non-linearity and finite signal propagation speeds are omnipresent in nature, technologies, and real-world problems, where efficient ways of describing and predicting the effects of these elements are in high demand. Advances in engineering condensed matter systems, such as lattices of trapped condensates, have enabled studies on non-linear effects in many-body systems where exchange of particles between lattice nodes is effectively instantaneous. Here, we demonstrate a regime of macroscopic matter-wave systems, in which ballistically expanding condensates of microcavity exciton-polaritons act as picosecond, microscale non-linear oscillators subject to time-delayed interaction. The ease of optical control and readout of polariton condensates enables us to explore the phase space of two interacting condensates up to macroscopic distances highlighting its potential in extended configurations. We demonstrate deterministic tuning of the coupled-condensate system between fixed point and limit cycle regimes, which is fully reproduced by time-delayed coupled equations of motion similar to the Lang-Kobayashi equation.

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