167 citations · 621 across the 14 of their papers we have counts for
8 papers · 1 filter
Thermometry of simulated Bose--Einstein condensates using machine learning
Jack Griffiths, Steven A. Wrathmall, Simon A. Gardiner
Precise determination of thermodynamic parameters in ultracold Bose gases remains challenging due to the destructive nature of conventional measurement techniques and inherent expe…
Spin-orbit coupled interferometry with ring-trapped Bose--Einstein condensates
John L. Helm, Thomas P. Billam, Ana Rakonjac +2
We propose a method of atom-interferometry using a spinor Bose-Einstein condensate (BEC) with a time-varying magnetic field acting as a coherent beam-splitter. Our protocol creates…
Excitation of knotted vortex lines in matter waves
F. Maucher, S. A. Gardiner, I. G. Hughes
We study the creation of knotted ultracold matter waves in Bose-Einstein condensates via coherent two-photon Raman transitions with a level configuration. The Raman transition…
Sagnac Interferometry Using Bright Matter-Wave Solitons
J. L. Helm, S. L. Cornish, S. A. Gardiner
We use an effective one-dimensional Gross-Pitaevskii equation to study bright matter-wave solitons held in a tightly confining toroidal trapping potential, in a rotating frame of r…
Splitting bright matter-wave solitons on narrow potential barriers: quantum to classical transition and applications to interferometry
J. L. Helm, S. J. Rooney, Christoph Weiss +1
We study bright solitons in the Gross-Pitaevskii equation as they are split and recombined in a low energy system. We present new analytic results determining the general region in…
Number-Conserving Approaches for Atomic Bose-Einstein Condensates: An Overview
S. A. Gardiner, T. P. Billam
Assuming the existence of a Bose-Einstein condensate composed of the majority of a sample of ultracold, trapped atoms, perturbative treatments to incorporate the non-condensate fra…
Variational determination of approximate bright matter-wave soliton solutions in anisotropic traps
T. P. Billam, S. A. Wrathmall, S. A. Gardiner
We consider the ground state of an attractively-interacting atomic Bose-Einstein condensate in a prolate, cylindrically symmetric harmonic trap. If a true quasi-one-dimensional lim…
Coherence and Instability in a Driven Bose-Einstein Condensate: A Fully Dynamical Number-Conserving Approach
T. P. Billam, S. A. Gardiner
We consider a Bose-Einstein condensate driven by periodic delta-kicks. In contrast to first-order descriptions, which predict rapid, unbounded growth of the noncondensate in resona…