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Bouncing Cosmology in Fourth-Order Gravity
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Bouncing Cosmology in Fourth-Order Gravity
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The Big Bang initial singularity problem can be solved by means of bouncing solutions. In the context of extended theories of gravity, we will look for covariant effective actions whose field equations contain up to fourth-order derivatives of the metric tensor. In finding such bouncing solutions, we will make use of an order reduction technique based on a perturbative approach. Reducing the order of the field equations to second-order, we are able to find solutions which are perturbatively close to General Relativity. We will build the covariant effective actions of the resulting order reduced theories.
Forward citations
Cited by 1 Pith paper
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Bouncing cosmologies from Born-Infeld-type gravity
A new ghost-free Born-Infeld-type f(R, G) gravity is built that admits a large family of bouncing cosmologies with varied asymptotic behaviors.
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