Efficiency of the UV-filtered Multiboson algorithm

Abstract

We study the efficiency of an improved Multiboson algorithm with two flavours of Wilson fermions in a realistic physical situation (${\hat{I}}^2=5.60$, $\hat{I}º=0.156$ on a $16^3\times 24$ lattice). The performance of this exact algorithm is compared with that of a state-of-the-art HMC algorithm: a considerable improvement is obtained for the plaquette auto-correlation time, while the two algorithms appear similarly efficient at decorrelating the topological charge.

7 pages, 8 Postscript figures