Multi-field Inflation in High-Slope Potentials. (arXiv:1905.07495v1 [hep-th])
<a href="http://arxiv.org/find/hep-th/1/au:+Aragam_V/0/1/0/all/0/1">Vikas Aragam</a>, <a href="http://arxiv.org/find/hep-th/1/au:+Paban_S/0/1/0/all/0/1">Sonia Paban</a>, <a href="http://arxiv.org/find/hep-th/1/au:+Rosati_R/0/1/0/all/0/1">Robert Rosati</a>
Inspired by the swampland distance conjecture and the high-slope conjecture,
we present two families of multi-field inflationary potentials compatible with
the conjectures along the trajectory. One family is a helix-type potential that
satisfies the conjectures only locally. This family inflates with
$epsilon_Vggepsilon_H$ and produces Planck-compatible scalar perturbations,
but a too-high tensor power. Our other family of potentials globally satisfies
the swampland conjectures and is in negatively-curved field space. It balances
the potential gradient against the geometry to generate high turning rates. Due
to the form of the potential, this model has exactly massless entropic
perturbations and a light adiabatic mode. In the superhorizon limit, the
entropic mode freezes out, which sources linear growth of the adiabatic mode.
In contrast to hyperinflation, both families remain under perturbative control.
Inspired by the swampland distance conjecture and the high-slope conjecture,
we present two families of multi-field inflationary potentials compatible with
the conjectures along the trajectory. One family is a helix-type potential that
satisfies the conjectures only locally. This family inflates with
$epsilon_Vggepsilon_H$ and produces Planck-compatible scalar perturbations,
but a too-high tensor power. Our other family of potentials globally satisfies
the swampland conjectures and is in negatively-curved field space. It balances
the potential gradient against the geometry to generate high turning rates. Due
to the form of the potential, this model has exactly massless entropic
perturbations and a light adiabatic mode. In the superhorizon limit, the
entropic mode freezes out, which sources linear growth of the adiabatic mode.
In contrast to hyperinflation, both families remain under perturbative control.
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