Bouncing cosmology in modified Gauss-Bonnet gravity

Abstract

We explore bounce cosmology in $F(\mathcal{G})$ gravity with the Gauss-Bonnet invariant $\mathcal{G}$. We reconstruct $F(\mathcal{G})$ gravity theory to realize the bouncing behavior in the early universe and examine the stability conditions for its cosmological solutions. It is demonstrated that the bouncing behavior with an exponential as well as a power-law scale factor naturally occurs in modified Gauss-Bonnet gravity. We also derive the $F(\mathcal{G})$ gravity model to produce the ekpyrotic scenario. Furthermore, we construct the bounce with the scale factor composed of a sum of two exponential functions and show that not only the early-time bounce but also the late-time cosmic acceleration can occur in the corresponding modified Gauss-Bonnet gravity. Also, the bounce and late-time solutions in this unified model is explicitly analyzed.

10 pages, 1 figure, version accepted for publication in Physics Letters B

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Cited by in corpus (12)

• Inflationary cosmology in modified gravity theories
• Exploring Bouncing Cosmologies with Cosmological Surveys
• Bouncing cosmologies with dark matter and dark energy
• A $\Lambda$CDM bounce scenario
• Bounce universe from string-inspired Gauss-Bonnet gravity
• $\Lambda$CDM Bounce Cosmology without $\Lambda$CDM: the case of modified gravity
• Pre-inflationary primordial perturbations
• The Asymptotic Behavior of Bouncing Cosmological Models in $F(\mathcal{G})$ Gravity Theory
• Collapse and dispersal of a homogeneous spin fluid in Einstein-Cartan theory
• Oscillating modulation to B-mode polarization from varying propagating speed of primordial gravitational waves
• An Emergent Universe supported by chiral cosmological fields in Einstein--Gauss--Bonnet gravity
• Inhomogeneous Dark Fluid and Dark Matter, Leading to a Bounce Cosmology