Parallel tempering and decorrelation of topological charge in full QCD
  The improvement of simulations of QCD with dynamical Wilson fermions by combining the Hybrid Monte Carlo algorithm with parallel tempering is studied on $10^4$ and $12^4$ lattices. As an indicator for decorrelation the topological charge is used. 
E.-M. Ilgenfritz, W. Kerler, M. M\"uller-Preussker, H. St\"uben