62 citations · 178 across the 5 of their papers we have counts for
5 papers
Mild Non-Gaussianities under Perturbative Control from Rapid-Turn Inflation Models
Theodor Bjorkmo, Ricardo Z. Ferreira, M. C. David Marsh
Inflation can be supported in very steep potentials if it is generated by rapidly turning fields, which can be natural in negatively curved field spaces. The curvature perturbation…
The rapid-turn inflationary attractor
Theodor Bjorkmo
We prove the existence of a general class of rapidly turning two-field inflationary attractors. By only requiring a large, slowly varying turn rate, we solve the system completely…
Hyperinflation generalised: from its attractor mechanism to its tension with the `swampland conjectures'
Theodor Bjorkmo, M. C. David Marsh
In negatively curved field spaces, inflation can be realised even in steep potentials. Hyperinflation invokes the `centrifugal force' of a field orbiting the hyperbolic plane to su…
Local, algebraic simplifications of Gaussian random fields
Theodor Bjorkmo, M. C. David Marsh
Many applications of Gaussian random fields and Gaussian random processes are limited by the computational complexity of evaluating the probability density function, which involves…
Manyfield Inflation in Random Potentials
Theodor Bjorkmo, M. C. David Marsh
We construct models of inflation with many randomly interacting fields and use these to study the generation of cosmological observables. We model the potentials as multi-dimension…