QCD-like theories with many fermions: magnetic plasma and unusual confinements

Abstract

This comment-style letter represents a part of my talks on new developments in lattice QCD. While it does not contain any new results, it containes some theoretical ideas and comparisons which, I think, are not yet widely discussed in the lattice community. We point out that for $N_f\sim 10$ one can study a plasma phase which is much more "magnetic dominated" than for small $N_f$. We also suggest certain tests/measurements to check if "unusual confinement" phases are or are not realized in this region.