Prefer a chat interface with context about you and your work?
Ultra slow-roll <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>G</mml:mi></mml:mrow></mml:math> inflation
The conventional slow-roll approximation is broken in the so-called ``ultra slow-roll'' models of inflation, for which the inflaton potential is exactly (or extremely) flat. The interesting nature of (canonical) ultra slow-roll inflation is that the curvature perturbation grows on superhorizon scales, but has a scale-invariant power spectrum. We study the …