Meron- and Semi-Vortex-Clusters as Physical Carriers of Topological Charge and Vorticity

Wolfgang Bietenholz, João C. Pinto Barros, Stephan Caspar +2

In O($N$) non-linear $\sigma$-models on the lattice, the Wolff cluster algorithm is based on rewriting the functional integral in terms of mutually independent clusters. Through improve…