%0 Journal Article
%T General Relativity as the Classical Limit of the Renormalizable Gauge Theory of Volume Preserving Diffeomorphisms
%A Christian Wiesendanger
%J Journal of Modern Physics
%P 948-958
%@ 2153-120X
%D 2014
%I Scientific Research Publishing
%R 10.4236/jmp.2014.510098
%X <p class=\"MsoNormal\" style=\"text-align:justify;\">
	<span lang=\"EN-US\" style=\"font-family:Verdana;\">The different roles and natures of spacetime appearing in a quantum field
theory and in classical physics are analyzed implying that a quantum theory of
gravitation is not necessarily a quantum theory of curved spacetime. Developing
an alternative approach to quantum gravity starts with the postulate that
inertial energy-momentum and gravitational energy-momentum need not be the same
for virtual quantum states. Separating their roles naturally leads to the
quantum gauge field theory of volume-preserving diffeomorphisms of an inner
four-dimensional space. The classical limit of this theory coupled to a
quantized scalar field is derived for an on-shell particle where inertial energy-momentum
and gravitational energy-momentum coincide. In that process the symmetry under
volume-preserving diffeomorphisms disappears and a new symmetry group emerges:
the group of coordinate transformations of four-dimensional spacetime and with
it General Relativity coupled to a classical relativistic point particle.</span>
</p>
%K Quantum Gravity
%K Quantum Gauge Theory of Volume-Preserving Diffeomorphism Group
%K GR Emerging as the Classical Limit of Above
%K Different Roles of Inertial and Gravitational Momentum
%K Observability of Spacetime at Microscopic Level
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=47438