# LATTICE QCD AT FIXED TOPOLOGY

Published

Since present Monte Carlo algorithms for lattice QCD may become trapped in a fixed topological charge sector, it is important to understand the effect of calculating at fixed topology. In this work, we show that although the restriction to a fixed topological sector becomes irrelevant in the infinite volume limit, it gives rise to characteristic finite size effects due to contributions from all $\theta$-vacua. We calculate these effects and show how to extract physical results from numerical data obtained at fixed topology.

### Cited Authors

• Brower, R; Chandrasekharan, S; Negele, JW; Wiese, UJ

• 2003

### Published In

• Phys. Lett. B

• 560 /

• 64 - 74