title: Tunable Magnetic Alignment between Trapped Exciton-Polariton Condensates.
abstract: Tunable spin correlations are found to arise between two neighboring trapped exciton-polariton condensates which spin polarize spontaneously. We observe a crossover from an antiferromagnetic to a ferromagnetic pair state by reducing the coupling barrier in real time using control of the imprinted pattern of pump light. Fast optical switching of both condensates is then achieved by resonantly but weakly triggering only a single condensate. These effects can be explained as the competition between spin bifurcations and spin-preserving Josephson coupling between the two condensates, and open the way to polariton Bose-Hubbard ladders.
authors.affiliation: Department of Physics, Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, United Kingdom.
authors.forename: H
authors.initials: H
authors.lastname: Ohadi
authors.affiliation: Department of Physics, Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, United Kingdom.
authors.forename: Y
authors.initials: Y
authors.lastname: Del Valle-Inclan Redondo
authors.affiliation: Department of Physics, Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, United Kingdom.
authors.forename: A
authors.initials: A
authors.lastname: Dreismann
authors.affiliation: Instituto de Energías Renovables, Universidad Nacional Autónoma de México, Temixco, Morelos 62580, Mexico.
authors.forename: Y G
authors.initials: YG
authors.lastname: Rubo
authors.affiliation: Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom.
authors.forename: F
authors.initials: F
authors.lastname: Pinsker
authors.affiliation: Foundation for Research and Technology-Hellas, Institute of Electronic Structure and Laser, 71110 Heraklion, Crete, Greece.
authors.forename: S I
authors.initials: SI
authors.lastname: Tsintzos
authors.affiliation: Foundation for Research and Technology-Hellas, Institute of Electronic Structure and Laser, 71110 Heraklion, Crete, Greece.|CCQCN, Department of Physics, University of Crete, 71003 Heraklion, Crete, Greece.
authors.forename: Z
authors.initials: Z
authors.lastname: Hatzopoulos
authors.affiliation: Foundation for Research and Technology-Hellas, Institute of Electronic Structure and Laser, 71110 Heraklion, Crete, Greece.|Department of Materials Science and Technology, University of Crete, 71003 Heraklion, Crete, Greece.
authors.forename: P G
authors.initials: PG
authors.lastname: Savvidis
authors.affiliation: Department of Physics, Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, United Kingdom.
authors.forename: J J
authors.initials: JJ
authors.lastname: Baumberg