Super Giant Quantum Vortex in a Pion Bose-Einstein Condensate.

Under the circumstance of parallel rotation and magnetic field that are expected in off-central heavy ion collisions, charged pions may form a Bose-Einstein condensate because of the lift of the Landau level degeneracy by rotation. We show that the ground state of such a pion superfluid is a super giant quantum vortex, i.e., a quantized vortex with a large circulation. The size of the vortex is as large as the system size, which may yield to observable effects in off-central heavy ion collisions.