We study lattice QCD with Nf=2 Wilson fermions at nonzero imaginary chemical potential and nonzero temperature. We relate the Roberge - Weiss phase transition to the properties of dyons which are constituents of the KvBLL calorons. We present numerical evidence that the characteristic features of the spectral gap of the overlap Dirac operator as function of an angle modifying the boundary condition are determined by the Z3 sector of the respective imaginary chemical potential. We then demonstrate that dyon excitations in thermal configurations could be responsible (in line with perturbative excitations) for these phenomena.
@article{arxiv.1611.07789,
title = {Dyons and Roberge - Weiss transition in lattice QCD},
author = {V. G. Bornyakov and D. L. Boyda and V. A. Goy and E. -M. Ilgenfritz and B. V. Martemyanov and A. V. Molochkov and Atsushi Nakamura and A. A. Nikolaev and V. I. Zakharov},
journal= {arXiv preprint arXiv:1611.07789},
year = {2017}
}
Comments
10 pages, 5 figures, Contribution to XIIth Quark Confinement and the Hadron Spectrum