  We present results from our study of the Parallel Tempering algorithm. We
examine the swapping acceptance rate of a twin subensemble PT system. We use
action matching technology in an attempt to maximise the swap acceptance rate.
We model the autocorrelation times within Parallel Tempering ensembles in terms
of autocorrelation times from Hybrid Monte Carlo. We present estimates for the
autocorrelation times of the plaquette operator.
