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Inflation using a triplet of Antisymmetric tensor fields

Abhijith AjithSukanta Panda
Dec 2022
摘要
We study an inflation model driven by a triplet of antisymmetric tensorfields, with minimal and nonminimal couplings to gravity. First, we show thatthe presence of a triplet of antisymmetric tensor fields can provide inherentbackground isotropy in the stress-energy tensor contrary to the past studiesusing an antisymmetric tensor field. Inflation is supported in the presence ofnon-minimal couplings with gravity. We perform the slow roll analysis and alsoanalyse perturbations to the antisymmetric tensor field as well as the tensormodes of perturbed metric. The speed of gravitational waves manifested from thetensor perturbations is tuned to $c$. We also study the evolution of thegravitational waves, calculate their power spectrum and tensor spectral index.
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