About 10 picoseconds after the Big Bang, the Higgs boson 'switched on' and the electromagnetic and weak interactions ceased to be unified. In some theories this happens by the formation and expansion of the bubbles you see here.
The collision of these bubbles, and the subsequent sloshing of all the other particles in the universe, might have been substantial sources of gravitational waves. Future space-based gravitational wave detectors like LISA will hunt for these waves. This offers us a new probe of particle physics at high energy scales.
Read about this work in New Scientist:
See a summary of the work on the GCS website:
For further information:
Video & code: David Weir
HPC resources: PRACE @ Gauss Centre for Supercomputing, CSC Finland (csc.fi/)