  In the quantum rotor model with random exchange interactions having a
non-zero mean, three phases, a 1) phase (Bose) glass, 2) superfluid, and 3)
Mott insulator, meet at a bi-critical point. We demonstrate that proximity to
the bi-critical point and the coupling between the energy landscape and the
dissipative degrees of freedom of the phase glass lead to a metallic state at
T=0. Consequently, the phase glass is unique in that it represents a concrete
example of a metallic state that is mediated by disorder, even in 2D. We
propose that the experimentally observed metallic phase which intervenes
between the insulator and the superconductor in a wide range of thin films is
in actuality a phase glass.
