Observable Primordial Gravitational Waves from Cosmic Inflation
Abstract
I will review briefly how inflation is expected to generate a stochastic background of primordial gravitational waves (GWs). Then, I will discuss how such GWs can be enhanced by a stiff period following inflation, enough to be observable. I will present examples of this in the context of hybrid inflation with α-attractors, or a period of hyperkination in Palatini gravity.
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