10 citations · 12 across the 2 of their papers we have counts for
2 papers
gr-qc2016★ 2 cited
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…
astro-ph.CO2016★ 10 cited
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…