A new efficient Cluster Algorithm for the Ising Model
  Using D-theory we construct a new efficient cluster algorithm for the Ising model. The construction is very different from the standard Swendsen-Wang algorithm and related to worm algorithms. With the new algorithm we have measured the correlation function with high precision over a surprisingly large number of orders of magnitude. 
Matthias Nyfeler, Michele Pepe, and Uwe-Jens Wiese (University of   Bern)