212 citations · 479 across the 13 of their papers we have counts for
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Extracting work from coherence in a two-mode Bose-Einstein condensate
L. A. Williamson, F. Cerisola, J. Anders +1
We show how work can be extracted from number-state coherence in a two-mode Bose-Einstein condensate. With careful tuning of parameters, a sequence of thermodynamically reversible…
Berezinskii-Kosterlitz-Thouless transitions in a ferromagnetic superfluid: effects of axial magnetization
Andrew P. C. Underwood, Andrew J. Groszek, Xiaoquan Yu +2
An easy-plane ferromagnetic spin-1 Bose gas undergoes two Berezinskii-Kosterlitz-Thouless (BKT) transitions, associated with mass and spin superfluidity respectively. We study the…
Dynamics of Polar-Core Spin Vortices in Inhomogeneous Spin-1 Bose-Einstein Condensates
Zachary L. Stevens-Hough, Matthew J. Davis, Lewis A. Williamson
In the easy-plane phase, a ferromagnetic spin-1 Bose-Einstein condensate is magnetized in a plane transverse to the applied Zeeman field. This phase supports polar-core spin vortic…
A damped point-vortex model for polar-core spin vortices in a ferromagnetic spin-1 Bose-Einstein condensate
Lewis A. Williamson, P. B. Blakie
Ferromagnetic spin-1 Bose-Einstein condensates in the broken-axisymmetric phase support polar-core spin vortices (PCVs), which are intimately linked to the nonequilibrium dynamics…
Anomalous phase ordering of a quenched ferromagnetic superfluid
L. A. Williamson, P. B. Blakie
Coarsening dynamics, the canonical theory of phase ordering following a quench across a symmetry breaking phase transition, is thought to be driven by the annihilation of topologic…
Coarsening dynamics of an isotropic ferromagnetic superfluid
Lewis A. Williamson, P. B. Blakie
In zero magnetic field the ground state manifold of a ferromagnetic spin-1 condensate is SO(3) and exhibits vortices as topological defects. We investigate the phase…
Dynamics of polar-core spin vortices in a ferromagnetic spin-1 Bose-Einstein condensate
Lewis A. Williamson, P. B. Blakie
A ferromagnetic spin-1 condensate supports polar-core spin vortices (PCVs) in the easy-plane phase. We derive a model for the dynamics of these PCVs using a variational Lagrangian…
Coarsening and thermalisation properties of a quenched ferromagnetic spin-1 condensate
Lewis A. Williamson, P. B. Blakie
We examine the dynamics of a quasi-two-dimensional spin-1 condensate in which the quadratic Zeeman energy q is suddenly quenched to a value where the system has a ferromagnetic gro…
Universal coarsening dynamics of a quenched ferromagnetic spin-1 condensate
Lewis A. Williamson, P. B. Blakie
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 implemen…