Gauge Fixing in Higher Derivative Gravity

Details Gauge Fixing in Higher Derivative Gravity Gauge Fixing in Higher Derivative Gravity

1998-11-12

arxiv.org/abs/gr-qc/9811041v1

Class.Quant.Grav.16:2283-2298,1999

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

21 pages, LaTeX

Scientific paper

10.1088/0264-9381/16/7/310

Linearized four-derivative gravity with a general gauge fixing term is considered. By a Legendre transform and a suitable diagonalization procedure it is cast into a second-order equivalent form where the nature of the physical degrees of freedom, the gauge ghosts, the Weyl ghosts, and the intriguing "third ghosts", characteristic to higher-derivative theories, is made explicit. The symmetries of the theory and the structure of the compensating Faddeev-Popov ghost sector exhibit non-trivial peculiarities.

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