出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：Overlap fermions which have an exact lattice chiral symmetry are used for investigating the topological
structure of the QCD vacuum. We study the relation between confinement and chiral
properties by focusing on monopoles in the Maximally-Abelian gauge at finite temperature. We
calculate the eigenvalue of the overlap Dirac operator on Abelian, monopole and photon backgrounds.
We find that the spectral densities on the Abelian and the monopole backgrounds have
a gap only in the deconfinement phase. This behaviors are similar to that on the non-Abelian
background. However on the photon background, there is a gap even in the confinement phase.
Our preliminary results suggest that the monopoles responsible for confinement play an important
role also for the chiral phase transition.
