Gauge Fixing in Higher Derivative Gravity

Abstract

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.

21 pages, LaTeX

References in corpus (1)

• Ostrogradski Formalism for Higher-Derivative Scalar Field Theories

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