158 citations · 915 across the 33 of their papers we have counts for
34 papers
Regularization of Single Field Inflation Models
Josh Hoffmann, David Sloan
There are many single field inflationary models that are consistent with the recent Planck 2018 measurements of the spectral index and tensor-to-scalar ratio . Despite goo…
Herglotz Action for Homogeneous Cosmology
David Sloan
We present an action from which the dynamics of homogeneous cosmologies can be derived. The action has no dependence on scale within the system and hence is more parsimonious in it…
Scaling Symmetries, Contact Reduction and Poincaré's dream
Alessandro Bravetti, Connor Jackman, David Sloan
A symplectic Hamiltonian system admitting a scaling symmetry can be reduced to an equivalent contact Hamiltonian system in which some physically-irrelevant degree of freedom has be…
Through a Black Hole Singularity
Flavio Mercati, David Sloan
We show that the Kantowski--Sachs model of a Schwarzschild black hole interior can be slightly generalized in order to accommodate spatial metrics of different orientations, and in…
Squared Quartic Hilltop Inflation
Josh Hoffmann, David Sloan
A correction to the Quartic Hilltop inflationary model is proposed to account for stabilising terms in the potential. We derive analytical predictions for the spectral index …
Scale Symmetry and Friction
David Sloan
Dynamical similarities are non-standard symmetries found in a wide range of physical systems that identify solutions related by a change of scale. In this paper we will show throug…