title: Twist of generalized skyrmions and spin vortices in a polariton superfluid.
abstract: 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.
authors.affiliation: CNR NANOTEC, Istituto di Nanotecnologia, 73100 Lecce, Italy.|Istituto Italiano di Tecnologia, Center for Biomolecular Nanotechnologies Lecce, 73010 Arnesano, Italy.
authors.forename: Stefano
authors.initials: S
authors.lastname: Donati
authors.affiliation: CNR NANOTEC, Istituto di Nanotecnologia, 73100 Lecce, Italy; lorenzo.dominici@gmail.com m.szymanska@ucl.ac.uk.
authors.forename: Lorenzo
authors.initials: L
authors.lastname: Dominici
authors.affiliation: Department of Physics, University of Warwick, CV4 7AL Coventry, United Kingdom.
authors.forename: Galbadrakh
authors.initials: G
authors.lastname: Dagvadorj
authors.affiliation: CNR NANOTEC, Istituto di Nanotecnologia, 73100 Lecce, Italy.
authors.forename: Dario
authors.initials: D
authors.lastname: Ballarini
authors.affiliation: CNR NANOTEC, Istituto di Nanotecnologia, 73100 Lecce, Italy.
authors.forename: Milena
authors.initials: M
authors.lastname: De Giorgi
authors.affiliation: Laboratoire Kastler Brossel, Pierre and Marie Curie University, Sorbonne Universités, CNRS, École Normale Supérieure, Paris Sciences et Lettres Research University, Collège de France, F-75005 Paris, France.
authors.forename: Alberto
authors.initials: A
authors.lastname: Bramati
authors.affiliation: CNR NANOTEC, Istituto di Nanotecnologia, 73100 Lecce, Italy.
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Gigli
authors.affiliation: Instituto de Energías Renovables, Universidad Nacional Autónoma de México, Temixco, Morelos 62580, Mexico.
authors.forename: Yuri G
authors.initials: YG
authors.lastname: Rubo
authors.affiliation: Department of Physics and Astronomy, University College London, WC1E 6BT London, United Kingdom lorenzo.dominici@gmail.com m.szymanska@ucl.ac.uk.
authors.forename: Marzena Hanna
authors.initials: MH
authors.lastname: Szymańska
authors.affiliation: CNR NANOTEC, Istituto di Nanotecnologia, 73100 Lecce, Italy.
authors.forename: Daniele
authors.initials: D
authors.lastname: Sanvitto
keywords: Poincaré space; condensates; polaritons; quantum vortices; topology