Breaking of de Sitter invariance in quantum cosmological gravity

Details Breaking of de Sitter invariance in quantum cosmological gravity Breaking of de Sitter invariance in quantum cosmological gravity

Nov 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993phlb..317..305k&link_type=abstract

Physics Letters B, Volume 317, Issue 3, p. 305-311.

Physics

11

Scientific paper

The effects of de Sitter transformations on linearized quantum gravity in a de Sitter space background are worked out explicitly. It is shown that the linearized solutions are closed under the transformations of the de Sitter group. To do this it is necessary to use a compensating gauge transformation to return the transformed solution to the original gauge. It is then shown that the form of the graviton propagator in this background, as found by Tsamis and Woodard, is not de Sitter invariant, and no suitable invariant propagator exists, even when gauge transformations which compensate for the noninvariant gauge choice are introduced. This leads us to conclude that the vacuum is not invariant.
Address after 1 August 1993: Department of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA.

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