The Sphaleron Rate from 4D Euclidean Lattices

Understand

We develop a new method to determine thermal activation rates, such as for bubble nucleation, topology change, \textsl{etc.}, using 4-dimensional Euclidean methods.

• This allows nonperturbative study on the lattice.
• We then investigate the strong sphaleron rate in pure-glue QCD at temperatures between 1.3 $\Tc$ and 1000 $T_\mathrm{c}$, making contact with previous results but extending them down close to the critical temperature.
• The extension to full QCD will be straightforward.