Warm inflation with non-comoving scalar field and radiation fluid
arXiv:2102.04728 · doi:10.1140/epjc/s10052-021-08964-6
Abstract
We consider a warm inflationary scenario in which the two dominant matter components present in the early Universe, the scalar field, and the radiation fluid, evolve with different four-velocities. This cosmological system is mathematically equivalent to a single anisotropic fluid, evolving with a four-velocity that is a function of the two independent fluid four-velocities. Due to the presence of the anisotropic physical parameters, the overall cosmological evolution is also anisotropic. We derive the gravitational field equations of the noncomoving scalar field-radiation mixture for a Bianchi type I geometry. By considering that the decay of the scalar field is accompanied by a corresponding radiation generation, we formulate the basic equations of the warm inflationary model in the presence of two noncomoving components. By adopting the slow roll approximation, we perform a detailed comparison of the theoretical predictions of the warm inflationary scenario with noncomoving scalar field and radiation fluid with the observational data obtained by the Planck satellite, by investigating both the weak dissipation and strong dissipation limits. Constraints on the free parameters of the model are obtained in both cases. The functional forms of the scalar field potentials compatible with the noncomoving nature of warm inflation are also derived.
25 pages, 8 figures, accepted for publication in EPJC
References in corpus (31)
- Unified cosmic history in modified gravity: from F(R) theory to Lorentz non-invariant models
- f(R,T) gravity
- Extra force in modified theories of gravity
- f(R,L_m) gravity
- Reheating in Inflationary Cosmology: Theory and Applications
- Nonperturbative Dynamics Of Reheating After Inflation: A Review
- Reheating constraints to inflationary models
- Probing cosmic isotropy with a new X-ray galaxy cluster sample through the scaling relation
- Power spectrum for inflation models with quantum and thermal noises
- Warm inflation dissipative effects: predictions and constraints from the Planck data
- Imprints of anisotropic inflation on the cosmic microwave background
- Intermediate inflation in light of the three-year WMAP observations
- Dissipative Effects on Reheating after Inflation
- Probing Dark Energy Anisotropy
- Warm Quintessential Inflation
- Cosmology with moving dark energy and the CMB quadrupole
- Observational implications of mattergenesis during inflation
- On the Possibility of Anisotropic Curvature in Cosmology
- Two-fluid dark matter models
- Particle production and reheating in the inflationary universe
- Hamilton-Jacobi formalism to warm inflationary scenario
- Non-comoving Cosmology
- Primordial non-Gaussianity in noncanonical warm inflation
- Dynamics of Polynomial Chaplygin Gas Warm Inflation
- Warm inflation in the presence of magnetic fields
- Impact of generalized dissipative coefficient on warm inflationary dynamics in the light of latest Planck data
- Observational Constraints on Two-field Warm Inflation
- Extended FLRW Models: dynamical cancellation of cosmological anisotropies
- Spectra and entropy of multi-field warm inflation
- Dark energy in motion
- Minimally coupled scalar fields as imperfect fluids