Gauss-Bonnet dark energy

Abstract

We propose the Gauss-Bonnet dark energy model inspired by string/M-theory where standard gravity with scalar contains additional scalar-dependent coupling with Gauss-Bonnet invariant. It is demonstrated that effective phantom (or quintessence) phase of late universe may occur in the presence of such term when the scalar is phantom or for non-zero potential (for canonical scalar). However, with the increase of the curvature the GB term may become dominant so that phantom phase is transient and $w=-1$ barrier may be passed. Hence, the current acceleration of the universe may be caused by mixture of scalar phantom and (or) potential/stringy effects. It is remarkable that scalar-Gauss-Bonnet coupling acts against the Big Rip occurence in phantom cosmology.

LaTeX file, 9 pages, some revision/errors corrected

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• Gauss-Bonnet black holes in a special anisotropic scaling spacetime
• Gauss-Bonnet Cosmology: large-temperature behaviour and bounds from Gravitational Waves
• Is Dark Energy Changing? Probing the Universe's Expansion with present and future astronomical probes
• Hubble Tension and Dark Energy in Teleparallel Gauss-Bonnet Gravity: New Constraints from DESI BAO, Pantheon${}^{+}$ and Hubble Data
• Gauss-Bonnet-induced symmetry breaking/restoration during inflation
• Dynamical Wormhole Solutions in $f(R,T)$ Gravity
• DNA Mutations via Chern-Simons Currents
• $n+1$ formalism of $f($Lovelock$)$ gravity
• On phenomenological parametrizations for the luminosity distance of gravitational waves
• k-Gauss-Bonnet inflation
• Primordial perturbations and inflation in a holography inspired Gauss-Bonnet cosmology
• Particle Production Scenario in an Algebraically Coupled Quintessence Field with a Dark Matter Fluid
• A Matter with an effective EoS interacting with a tachynic field in an accelerating Universe
• Matter Creation Cosmologies and Accelerated Expansion
• Onset of dark energy from cosmological scalarization and gravitational wave speed
• On the coupling of vector fields to the Gauss-Bonnet invariant
• Singularities in and Stability of Ooguri-Vafa-Verlinde Cosmologies
• Constraints on a scalar-tensor model with Gauss-Bonnet coupling from SN Ia and BAO observations
• Generic autonomous system approach to interacting dark energy models
• Entropic uncertainty and coherence in Einstein-Gauss-Bonnet gravity
• Acceleration of the universe in matter dominant era by conformal symmetry breaking
• Curvaton reheating and intermediate inflation in brane cosmology
• Perusing Buchbinder--Lyakhovich canonical formalism for Higher-Order Theories of Gravity
• Examples of exact exponential cosmological solutions with three isotropic subspaces in the Einstein-Gauss-Bonnet gravity
• Beyond $f(\varphi )\mathcal{G}$: Gauss--Bonnet inflation with $\mu (\varphi ,X)$
• Correspondence between particle creation and dark components interaction in the context of $f(\mathcal{G})$ gravity
• On the number of terms in the Lovelock products
• $f(R,\mathcal{G})$-cosmological dynamics in the FLRW background
• Some Classes of Gravitational Shock Waves from Higher Order Theories of Gravity
• Intermediate evolution using SNIa, and BAO
• Applications of Cosmological Perturbation Theory in the Late Universe
• Bayesian and Machine-Learning Analyses of Nonminimal $f(Q)$ Gravity and $H_0$ Tension