Now showing items 1-7 of 7

  • Effect of the radial and azimuthal mode indices of a partially coherent vortex field upon a spatial correlation singularity 

    Yang, Yuanjie; Chen, Mingzhou; Mazilu, Michael; Mourka, Areti; Liu, Yi-Dong; Dholakia, Kishan (2013-11-26) - Journal article
    The existence of a spatial correlation singularity or a ring dislocation in the spatial coherence function when a vortex is present has been demonstrated recently. Here, we investigate how the spatial correlation singularity ...
  • Impeded inverse energy transfer in the Charney--Hasegawa--Mima model of quasi-geostrophic flows 

    Tran, Chuong Van; Dritschel, David Gerard (2006-03-25) - Journal article
    The behaviour of turbulent flows within the single-layer quasi-geostrophic (Charney-Hasegawa-Mima) model is shown to be strongly dependent on the Rossby deformation wavenumber lambda (or free-surface elasticity). Herein, ...
  • Instability in internal solitary waves with trapped cores 

    Carr, Magda; King, Stuart Edward; Dritschel, David Gerard (2012-01) - Journal article
    A numerical method that employs a combination of contour advection and pseudo-spectral techniques is used to investigate instability in internal solitary waves with trapped cores. A three-layer configuration for the ...
  • Muon-Spin Rotation Measurements of an Unusual Vortex-Glass Phase in the Layered Superconductor Bi2.15Sr1.85CaCu2O8+δ 

    Heron, David Owen Goudie; Ray, Soumya Jyoti; Lister, Stephen Joseph Shelford; Aegerter, C. M.; Keller, H.; Kes, P. H.; Menon, G. I.; Lee, Stephen Leslie (2013-03-06) - Journal article
    Muon-spin rotation measurements, performed on the mixed state of the classic anisotropic superconductor Bi2.15Sr1.85CaCu2O8+δ, obtain quantities directly related to two- and three-body correlations of vortices in space. A ...
  • Parametric relaxation in whispering gallery mode exciton-polariton condensates 

    Dietrich, C. P.; Johne, R.; Michalsky, T.; Sturm, C.; Eastham, P.; Franke, H.; Lange, M.; Grundmann, M.; Schmidt-Grund, R. (2015-01-16) - Journal article
    Polariton condensation of one-dimensional multimode whispering gallery mode exciton polaritons is investigated in hexagonal ZnO microwires at cryogenic temperatures. At threshold, stimulated scattering is fed by the resonant ...
  • The quasi-geostrophic ellipsoidal vortex model 

    Dritschel, David Gerard; Reinaud, Jean Noel; McKiver, William J (2004-04-25) - Journal article
    We present a simple approximate model for studying general aspects of vortex interactions in a rotating stably-stratified fluid. The model idealizes vortices by ellipsoidal volumes of uniform potential vorticity, a materially ...
  • Visualization of the birth of an optical vortex using diffraction from a triangular aperture 

    Mourka, A.; Baumgartl, J.; Shanor, C.; Dholakia, K.; Wright, E. M. (2011-03-28) - Journal article
    The study and application of optical vortices have gained significant prominence over the last two decades. An interesting challenge remains the determination of the azimuthal index (topological charge) l of an optical ...