Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2011-08-14
J.Phys.A44:402001,2011
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
8 pages, 0 figures, to appear in J. Phys. A as a fast track communication
Scientific paper
In this paper we will study the spontaneous breakdown of the Lorentz symmetry by ghost condensation in perturbative quantum gravity. Our analysis will be done in the Curci-Ferrari gauge. We will also analyse modification of the BRST and the anti-BRST transformations by the formation of this ghost condensate. It will be shown that even though the modified BRST and the modified anti-BRST transformations are not nilpotent, their nilpotency is restored on-shell.
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