  Successful implementation of several quantum information and communication
protocols require distributing entangled pairs of quantum bits in reliable
manner. While there exists a substantial amount of recent theoretical and
experimental activities dealing with non-Markovian quantum dynamics,
experimental application and verification of the usefulness of memory-effects
for quantum information tasks is still missing. We combine these two aspects
and show experimentally that a recently introduced concept of nonlocal memory
effects allows to protect and distribute polarization entangled pairs of
photons in efficient manner within polarization-maintaining (PM) optical
fibers. The introduced scheme is based on correlating the environments, i.e.
frequencies of the polarization entangled photons, before their physical
distribution. When comparing to the case without nonlocal memory effects, we
demonstrate at least 12-fold improvement in the channel, or fiber length, for
preserving the highly-entangled initial polarization states of photons against
dephasing.
