Reconstructing f(T) gravity and exploring the torsion driven warm inflationary cosmology
Abstract The current paper reports an investigation of a warm inflationary scenario in the context of f(T) gravity for a spatially flat FLRW universe. In our model, inflation is driven purely by the torsional sector of f(T) gravity, without introducing any additional scalar fields. We focus on the h...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2025-07-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-025-14461-x |
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| Summary: | Abstract The current paper reports an investigation of a warm inflationary scenario in the context of f(T) gravity for a spatially flat FLRW universe. In our model, inflation is driven purely by the torsional sector of f(T) gravity, without introducing any additional scalar fields. We focus on the high dissipative regime ( $$R \gg 1$$ R ≫ 1 ), reconstruct the Hubble parameter as a function of the e-folding number N, and derive the slow-roll parameters $$\varepsilon _1(N)$$ ε 1 ( N ) and $$\varepsilon _2(N)$$ ε 2 ( N ) . The study has encapsulated the dynamics of inflation and its duration under strong dissipation. The dissipative coefficient $$\Gamma $$ Γ is modeled with a temperature-dependent power-law form, linking the inflationary dynamics to thermal corrections and the particle content of the early universe. The analysis has affirmed that the torsion-induced energy density $$\rho _T$$ ρ T successfully transitions to radiation energy density $$\rho _{rad}$$ ρ rad , facilitating a graceful exit from inflation. Finally, we have validated our model by comparing the scalar spectral index and tensor-to-scalar ratio with Planck 2018 results, demonstrating consistency within observational bounds. Additionally, it is verified that the thermal domination condition $$T_{*}/H > 1$$ T ∗ / H > 1 and the torsion dominance condition $$\rho _T/\rho _{rad} > 1$$ ρ T / ρ rad > 1 are satisfied. |
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| ISSN: | 1434-6052 |