The authors claim that canonical quantization of Einstein-Hilbert plus Gauss-Bonnet squared gravity requires a cosmological constant to resolve contradictions, but the contradictions appear to follow from questionable assumptions rather than from the theory itself.
Higher-Order Gauss-Bonnet Cosmology
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abstract
We study cosmological models derived from higher-order Gauss-Bonnet gravity $F(R,G)$ by using the Lagrange multiplier approach without assuming the presence of additional fields with the exception of standard perfect fluid matter. The presence of Lagrange multipliers reduces the number of allowed solutions. We need to introduce compatibility conditions of the FRW equations, which impose strict restrictions on the metric or require the introduction of additional exotic matter. Several classes of $F(R,G)$ models are generated and discussed.
fields
gr-qc 1years
2019 1verdicts
REJECT 1representative citing papers
citing papers explorer
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The role of cosmological constant in f(R, G) gravity
The authors claim that canonical quantization of Einstein-Hilbert plus Gauss-Bonnet squared gravity requires a cosmological constant to resolve contradictions, but the contradictions appear to follow from questionable assumptions rather than from the theory itself.