57 citations · 199 across the 8 of their papers we have counts for
4 papers · 1 filter
The adiabatic/entropy decomposition in theories with multiple sound speeds
Chris Longden
We consider theories of multi-field inflation and ask the question of how to define the adiabatic and entropy perturbations, widely used in calculating the curvatur…
Non-Gaussianity in multi-sound-speed disformally coupled inflation
Carsten van de Bruck, Tomi Koivisto, Chris Longden
Most, if not all, scalar-tensor theories are equivalent to General Relativity with a disformally coupled matter sector. In extra-dimensional theories such a coupling can be underst…
Running of the Running and Entropy Perturbations During Inflation
Carsten van de Bruck, Chris Longden
In single field slow-roll inflation, one expects that the spectral index is first order in slow-roll parameters. Similarly, its running and the runni…
Reheating in Gauss-Bonnet-coupled inflation
Carsten van de Bruck, Konstantinos Dimopoulos, Chris Longden
We investigate the feasibility of models of inflation with a large Gauss-Bonnet coupling at late times, which have been shown to modify and prevent the end of inflation. Despite th…