QCD at fixed topology

@article{Brower2003QCDAF,
  title={QCD at fixed topology},
  author={R. Brower and Shailesh Chandrasekharan and John W. Negele and U. Wiese},
  journal={Physics Letters B},
  year={2003},
  volume={560},
  pages={64-74}
}
Abstract 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 Letter, 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 θ -vacua. We calculate these effects and show how to extract physical results from… Expand
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