My principal research interests are the non-equilibrium dynamics of ultracold Bose gases. In particular I am interested in:
Quantum vortex dynamics and two-dimensional quantum turbulence: During a two-year postdoc at the University of Otago I worked on schemes for vortex injection in BECs, and on methods of analysis for vortex dynamics, with Ashton Bradley and others. Presently, I am interested in answering some fundamental questions about the nature of energy transport across scale-space in superfluid vortex dynamics.
Non-equilibrium BEC dynamics in the presence of significant quantum depletion: In this area I have a long-standing collaboration with Simon Gardiner developing and implementing number-conserving techniques for coupled condensate - non-condensate dynamics at finite temperatures. A focus for our work to date has been quantum chaos and quantum resonances in driven BEC systems.
Bright solitary matter-waves: dynamics and applications to interferometry: I have worked on a variety of topics related to bright solitons in attractively-interacting BECs, including proposals for interferometric schemes exploiting their non-dispersive behaviour. More recently, I have worked with Christoph Weiss and others studying the quantum behaviour of bright solitons for small atom numbers, and provided numerical modelling for the successful 85Rb bright soliton experiment of Simon Cornish.