The Aoki phase revisited

Details The Aoki phase revisited The Aoki phase revisited

2010-12-13

arxiv.org/abs/1012.2781v2

PoS(Lattice 2010)091

Physics

High Energy Physics

High Energy Physics - Lattice

7 pages, talk given at the XXVIII International Symposium on Lattice Field Theory, June 14-19, 2010, Villasimius, Italy. v2 co

Scientific paper

In order to elucidate the vacuum structure of the Aoki phase, we carried out a numerical investigation of QCD with two flavours of Wilson fermions, within the p.d.f. framework and in the absence of external sources. The simulations performed at V = 44 suggest a rich vacuum structure, where the observable $i\bar\psi\gamma_5\psi$ is allowed to take non-zero values of the same order of magnitude than the order parameter of the Aoki phase $i\bar\psi\gamma_5\tau_3\psi$. However, the simulation at higher volumes V = 6^4 suffers from large statistical errors.

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