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Durham Group Meetings

Our group meetings are not restricted to members of the SPOCK group. If you see a meeting that interests you, feel free to come along!

Upcoming Durham Meetings

Thare are no meetings scheduled at the moment. Please see below foe details of previous meetings

Previous Durham Meetings

Previous meetings for the current academic year are listed below. Please see our archive page for details of meetings in Durham prior to this

Date Room Theme Talk Information
29/03/2017 CM2105Dave Foster and Alexander Taylor, University of BristolBristol group visit to Durham
08/03/2017 CM219Dr Hayder Salman, University of East Anglia, Threading Knotted and Tangled Filamentary Phase Defects in Complex Scalar FieldsExperimental advances that have been made in recent years have made it increasingly possible to create matter wave fields in atomic Bose-Einstein condensates containing knotted or linked filamentary phase defects. These defects correspond to topological excitations in the form of quantized superfluid vortices. Knotted vortices have already been created and studied under controlled conditions in classical fluids. However, in these cases, vorticity acts to erode the vortical core of the vortices. An advantage of quantized superfluid vortices is that the vorticity remains concentrated along filaments throughout the dynamics. Nevertheless, quantum effects allow reconnections to occur that can change the topology of the fluid. This makes matter wave (as well as optical) fields an ideal setting in which to quantify helicity for topologically non-trivial vortex configurations. Although an excellent microscopic model exists to study the dynamics of such defects in superfluids, several challenges exist in generating an initial wavefunction containing knotted configurations. In this talk, I will show, using methods from differential geometry, how one can imprint any desired vortex configuration into the wavefunction. Using the imprinted fields, we perform numerical simulations of several knotted defects to illustrate their dynamical behaviour. I will also discuss the role of helicity for superfluid vortices.
22/02/2017CM219BZBZ
08/02/2017CM219BZBZ
25/01/2017CM219BZBZ
14/12/2016CM212aBZBZ
23/11/2016CG60PhysicsFabian Maucher - Research Update

Quick Links
International Guild of Knot Tyers
SPOCK Interactive Knot Identification Tool
Previous Knots of the Month
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