极化激元超流体中涡旋与反涡旋的合并
Merging of vortices and antivortices in polariton superfluids
摘要：
量子涡旋是量子流体相干性质在宏观尺度上的显著表现，研究其性质对于理解物质的这种特殊状态具有根本的重要性。腔极化激元，由于其双重的光-物质性质，提供了一个独特的可控环境来研究这些性质。在这项工作中，我们从理论上研究的可能性，以确定性地实现湮灭的旋涡与反涡通过增加的极化激元密度在周围的区域的旋涡。此外，我们证明，通过这种机制的一个阵列的涡旋-antivortex对可以完全洗出。
英文摘要：
Quantised vortices are remarkable manifestations on a macroscopic scale of the coherent nature of quantum fluids, and the study of their properties is of fundamental importance for the understanding of this peculiar state of matter. Cavity-polaritons, due to their double light-matter nature, offer a unique controllable environment to investigate these properties. In this work we theoretically investigate the possibility to deterministically achieve the annihilation of a vortex with an antivortex through the increase of the polariton density in the region surrounding the vortices. Moreover we demonstrate that by means of this mechanism an array of vortex-antivortex pairs can be completely washed out.
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