Scalar Induced Gravitational Waves from Warm Inflation

Understand

Stochastic gravitational waves can be induced from the primordial curvature perturbations generated during inflation, through scalar-tensor mode coupling at the second order of cosmological perturbation theory.

• Here we discuss a model of warm inflation in which large curvature perturbations are generated at the small scales because of inflaton dissipation.
• These overdense perturbations then collapse at later epoch to form primordial black holes, as was studied in our earlier work (Ref.
• \cite{Arya:2019wck}), and therefore may also act as a source to the second-order tensor perturbations.