  We use a string T-duality corrected pair of regular black holes to construct
an Einstein-Rosen (ER) bridge with the wormhole throat proportional to the
zero-point (Planck) length. This may be a geometric realization of quantum
entanglement for particle/antiparticle pairs. We point out that for an extreme
mass configuration consisting of a black hole pair, one can have an ER bridge
with a horizon area that coincides with the Bekenstein minimal area bound along
with a wormhole mass proportional to the Planck mass. This could be related to
gravitational self-completeness with quantum mechanical mass limits. We also
discuss the ER bridge for sub-Planckian mass horizonless wormholes and show
this admits a region of negative energy at the throat, which we posit to be
related to a particle of negative mass generated by quantum fluctuations or the
Casimir effect. We argue that Hawking radiation could be the best way for the
geometric realization of quantum entanglement for particle/antiparticle pairs
emitted by black holes. This sheds new light on the ER=EPR conjecture.
