title: Universal Coarsening Dynamics of a Quenched Ferromagnetic Spin-1 Condensate.
abstract: We demonstrate that a quasi-two-dimensional spin-1 condensate quenched to a ferromagnetic phase undergoes universal coarsening in its late time dynamics. The quench can be implemented by a sudden change in the applied magnetic field and, depending on the final value, the ferromagnetic phase has easy-axis (Ising) or easy-plane (XY) symmetry, with different dynamical critical exponents. Our results for the easy-plane phase reveal a fractal domain structure and the crucial role of polar-core spin vortices in the coarsening dynamics.
authors.affiliation: Department of Physics, Dodd-Walls Centre for Photonic and Quantum Technologies, University of Otago, Dunedin 9016, New Zealand.
authors.forename: Lewis A
authors.initials: LA
authors.lastname: Williamson
authors.affiliation: Department of Physics, Dodd-Walls Centre for Photonic and Quantum Technologies, University of Otago, Dunedin 9016, New Zealand.
authors.forename: P B
authors.initials: PB
authors.lastname: Blakie