"Towards periodic arrays of coupled vortices inexciton-polariton condensates" by Dr. Sergey Alyatkin скачать в хорошем качестве

"Towards periodic arrays of coupled vortices inexciton-polariton condensates" by Dr. Sergey Alyatkin

On Wednesday, January 17 at 15:00, Moscow time, ACTP will hold the seminar on "Towards periodic arrays of coupled vortices in exciton-polariton condensates" by Dr. Sergey Alyatkin. Abstract In this talk I will briefly cover our latest experimental results obtained at Skoltech (Moscow) in collaboration with the University of Southampton (UK). We study composite microcavity exciton-polaritons, which can undergo power driven out-of-equilibrium Bose-Einstein condensation. Optical malleability of the polariton system makes it appealing for generation and study of numerous exotic condensed matter states including quantized vortices. We will start with nonresonantly optically imprinted arrays of spatially extended polariton condensates (in different geometries) and finish with coupled trapped condensates carrying vorticity. We realize a triangular vortex lattice with each cell possessing a vortex state of topological charge . We show that a pair of trapped condensates spontaneously form either vortex-antivortex or antivortex-vortex pairs, implying a presence of “orbital antiferromagnetism”. Moreover, we confirm that the vortices in the large-scale system of 22-cells also reveal a tendency for antiferromagnetic arrangement.