The lepton asymmetry of order one is not excluded experimentally and, if
present, can lead to interesting phenomena in the early Universe. It is shown
that, when the temperature is above the quark-hadron transition, the lepton
asymmetry induces chemical potentials for electric charge and for baryon
number, and makes the quark-gluon plasma electrically charged.Comment: 7 pages, 2 figures; v2: misprints in eqs. 10 and 13 correcte
