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Gravity as a diffeomorphism invariant gauge theory | | Kirill Krasnov
; | | Date: |
25 Jan 2011 | | Abstract: | A general diffeomorphism invariant SU(2) gauge theory is a gravity theory
with two propagating polarisations of the graviton. We develop this description
of gravity, in particular for future applications to the perturbative
quantisation. Thus, the linearised theory, gauge symmetries, gauge fixing are
discussed in detail, and the propagator is obtained. The propagator takes a
simple form of that of Yang-Mills theory with an additional projector on
diffeomorphism equivalence classes of connections inserted. In our approach the
gravitational perturbation theory takes a rather unusual form in that the
Planck length determined from the self-coupling of the graviton is no longer
fundamental but becomes a derived quantity. | | Source: | arXiv, 1101.4788 | | Services: | Forum | Review | PDF | Favorites | |
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