63 citations · 292 across the 12 of their papers we have counts for
12 papers
A Prolog assisted search for new simple Lie algebras
David Cushing, George W. Stagg, David I. Stewart
We describe some recent computer investigations with the `Constraint Logic Programming over Finite Domains' -- CLP(FD) -- library in the Prolog programming environment to search fo…
Spin-up of a superfluid vortex lattice driven by rough boundaries
N. A. Keepfer, G. W. Stagg, L. Galantucci +2
We study numerically the formation of a vortex lattice inside a rotating bucket containing superfluid helium, paying attention to an important feature which is practically unavoida…
The Graph Curvature Calculator and the curvatures of cubic graphs
David Cushing, Riikka Kangaslampi, Valtteri Lipiäinen +2
We classify all cubic graphs with either non-negative Ollivier-Ricci curvature or non-negative Bakry-Émery curvature everywhere. We show in both curvature notions that the non-nega…
Quantum ferrofluid turbulence
T. Bland, G. W. Stagg, L. Galantucci +2
We study the elementary characteristics of turbulence in a quantum ferrofluid through the context of a dipolar Bose gas condensing from a highly non-equilibrium thermal state. Our…
The additive structure of the squares inside rings
David Cushing, G. W. Stagg
When defining the amount of additive structure on a set it is often convenient to consider certain sumsets; Calculating the cardinality of these sumsets can elucidate the set's und…
Vortex scattering by impurities in a Bose-Einstein condensate
A. Griffin, G. W. Stagg, N. P. Proukakis +1
Understanding quantum dynamics in a two-dimensional Bose-Einstein condensate (BEC) relies on understanding how vortices interact with each others microscopically and with local imp…
Ultra-quantum turbulence in a quenched homogeneous Bose gas
G. W. Stagg, N. G. Parker, C. F. Barenghi
Using the classical field method, we study numerically the characteristics and decay of the turbulent tangle of superfluid vortices which is created in the evolution of a Bose gas…
A superfluid boundary layer
G. W. Stagg, N. G. Parker, C. F. Barenghi
We model the superfluid flow of liquid helium over the rough surface of a wire (used to experimentally generate turbulence) profiled by atomic force microscopy. Numerical simulatio…
Critical velocity of a finite-temperature Bose gas
G. W. Stagg, R. W. Pattinson, C. F. Barenghi +1
We use classical field simulations of the homogeneous Bose gas to study the breakdown of superflow due to vortex nucleation past a cylindrical obstacle at finite temperature. Therm…
Classical-like wakes past elliptical obstacles in atomic Bose-Einstein condensates
G. W. Stagg, A. J. Allen, C. F. Barenghi +1
We reinvestigate numerically the classic problem of two-dimensional superfluid flow past an obstacle. Taking the obstacle to be elongated (perpendicular to the flow), rather than t…
Generation and Decay of Two-Dimensional Quantum Turbulence in a Trapped Bose-Einstein Condensate
G. W. Stagg, A. J. Allen, N. G. Parker +1
In a recent experiment, Kwon et. al (arXiv:1403.4658 [cond-mat.quant-gas]) generated a disordered state of quantum vortices by translating an oblate Bose-Einstein condensate past a…
Quantum Analogs of Classical Wakes in Bose-Einstein Condensates
G. W. Stagg, N. G. Parker, C. F. Barenghi
We show that an elliptical obstacle moving through a Bose-Einstein condensate generates wakes of quantum vortices which resemble those of classical viscous flow past a cylinder or…