Self-rotation occurs in an exciton-polariton condensate in a two-dimensional semiconductor microcavity pumped by a nonresonant Gaussian laser beam. A wave packet of the condensate spontaneously rotates around the center of the pumped region at a constant frequency breaking the rotation symmetry of the system. When two self-rotating condensates are created with an appropriate distance, synchronization occurs between the dynamics of the self-rotating condensates.
@article{arxiv.1606.07586,
title = {Self-rotation and synchronization in exciton-polariton condensates},
author = {Hiroki Saito and Rina Kanamoto},
journal= {arXiv preprint arXiv:1606.07586},
year = {2016}
}