  We introduce quantum spatio-temporal dynamics (QSD) as modeled by the Nexus
Paradigm (NP) of quantum gravity to resolve the problem of energy-momentum
localization in a gravitational field. Currently, the gravitational field as
described using the language of geometry modeled under General Relativity (GR)
fails to provide a generally accepted definition of energy-momentum. Attempts
at resolving this problem using geometric methods have resulted in various
energy-momentum complexes whose physical meaning remain dubious since the
resulting complexes are non-tensorial under a general coordinate
transformation. In QSD, the tangential manifold is the affine connection field
in which energy-momentum localization is readily defined. We also discover that
the positive mass condition is a natural consequence of quantization and that
dark energy is a Higgs like field with negative energy density everywhere.
Finally, energy-momentum localization in quantum gravity shows that a free
falling object will experience larger vacuum fluctuations (uncertainties in
location) in strong gravity than in weak gravity and that the amplitudes of
these oscillations define the energy of the free falling object.
