2016/12/31 by Stefano Donati, Lorenzo Dominici, Galbadrakh Dagvadorj +7 · 2 citations
Physics and Astronomy · #cond-mat.mes-hall #cond-mat.quant-gas #physics.optics
paper · pdf · doi:10.1073/pnas.1610123114
published as Proceedings of the National Academy of Sciences USA 113, 14926 (2016) · 8 pages, 4 figures, SI 3 pages, SI 6 movies at http://www.pnas.org/content/113/52/14926?tab=ds and https://drive.google.com/open?id=0B0QCllnLqdyBUkVaSFpqSHB0cHM
arxiv created 2016/12/31 · arxiv updated 2017/01/03
We study the spin vortices and skyrmions coherently imprinted into an exciton-polariton condensate on a planar semiconductor microcavity. We demonstrate that the presence of a polarization anisotropy can induce a complex dynamics of these structured topologies, leading to the twist of their circuitation on the Poincaré sphere of polarizations. The theoretical description of the results carries the concept of generalized quantum vortices in two-component superfluids, which are conformal with polarization loops around an arbitrary axis in the pseudospin space.