Onset of dark energy from cosmological scalarization and gravitational wave speed
arXiv:2310.03697 · doi:10.1007/s10714-025-03431-z
Abstract
This study investigates the emergence of dark energy during the matter-dominated era through spontaneous cosmological scalarization in the scalar-Ricci-Gauss-Bonnet model.Our model aligns with the conjecture that the speed of gravitational waves at low redshifts is nearly equal to the speed of light, implying that the Gauss-Bonnet invariant does not directly contribute to late-time acceleration and suggesting that scalarization begins in the radiation-dominated era. The Gauss-Bonnet coupling stabilizes the quintessence field at an initial fixed point with negligible dark energy density during the radiation era. As the Universe expands, the Ricci coupling induces a tachyonic transition in the quintessence field, driving the evolution of dark energy.
18 pages, 6 figures, major revision
References in corpus (17)
- GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
- Gravitational Waves and Gamma-rays from a Binary Neutron Star Merger: GW170817 and GRB 170817A
- Dark Energy after GW170817: dead ends and the road ahead
- Dark energy cosmology from higher-order, string-inspired gravity and its reconstruction
- String-inspired Gauss-Bonnet gravity reconstructed from the universe expansion history and yielding the transition from matter dominance to dark energy
- Gauss-Bonnet Quintessence: Background Evolution, Large Scale Structure and Cosmological Constraints
- Cosmological coincidence problem in interacting dark energy models
- Primordial Gravitational Waves Predictions for GW170817-compatible Einstein-Gauss-Bonnet Theory
- Cosmological instability of scalar-Gauss-Bonnet theories exhibiting scalarization
- Domain walls coupled to matter: the symmetron example
- Cosmological dynamical systems in modified gravity
- Observational constraints on soft dark energy and soft dark matter: challenging CDM
- The Noether Symmetry Approach: Foundation and applications. The case of scalar-tensor Gauss-Bonnet gravity
- Scalar-Gauss-Bonnet model, the coincidence problem and the gravitational wave speed
- Symmetric Teleparallel Gauss-Bonnet Gravity and its Extensions
- Comoving curvature perturbation in Jordan and Einstein frames
- Early dark energy and scalarization in a scalar-tensor model