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Scalar perturbation spectra from warm inflation
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abstract
We present a numerical integration of the cosmological scalar perturbation equations in warm inflation. The initial conditions are provided by a discussion of the thermal fluctuations of an inflaton field and thermal radiation using a combination of thermal field theory and thermodynamics. The perturbation equations include the effects of a damping coefficient $\Gamma$ and a thermodynamic potential $V$. We give an analytic expression for the spectral index of scalar fluctuations in terms of a new slow-roll parameter constructed from $\Gamma$. A series of toy models, inspired by spontaneous symmetry breaking and a known form of the damping coefficient, lead to a spectrum with $n_s>1$ on large scales and $n_s<1$ on small scales.
Forward citations
Cited by 3 Pith papers
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DSWIM:Efficient and Stable Deterministic Computation of Warm Inflation Perturbations
DSWIM adds a scaled deterministic correlation-matrix solver to SWIM that improves numerical conditioning for warm-inflation perturbations while exactly preserving the curvature power spectrum and resolving stochastic-...
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Dark Matter as an Inflationary Relic in Warm Inflation
In warm inflation with Υ∝T³, a residual inflaton condensate after rapid drop in Q evolves as cold dark matter with mass fixed at m≈0.02 MeV by the observed abundance.
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Behaviour of $\alpha$-attractors in Warm Inflation
In strongly dissipative warm inflation, T, E, and polynomial alpha-attractor models lose the cold-inflation attractor convergence in the n_s-r plane.
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