Derives conditions under which energy remains positive for individual plane waves in six- and eight-derivative polynomial gravity, focusing on tensor and scalar sectors of the free theory.
Shapiro, The background information about perturbative quantum gravity , (Review pa- per for the Handbook of Quantum Gravity, Editors C
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Conditions for positivity of energy in superrenormalizable polynomial gravity
Derives conditions under which energy remains positive for individual plane waves in six- and eight-derivative polynomial gravity, focusing on tensor and scalar sectors of the free theory.