Vortex liquid in superconducting vacuum of QCD induced by strong magnetic field.

Abstract

In the background of the strong magnetic field the vacuum is suggested to possess an electromagnetically superconducting phase characterised by the charged ρ-meson condensate. The ρ-meson condensate is inhomogeneous due to the presence of the string-like defects which are parallel to the magnetic field. In agreement with these expectations, we have observed the presence of the ρ-vortices in numerical simulations of the vacuum of the quenched two-color lattice QCD in strong magnetic field background. We have found that in the quenched QCD the ρ-vortices form a liquid.