4 papers · 1 filter
A Compact Story of Positivity in de Sitter
Priyesh Chakraborty, Timothy Cohen, Daniel Green +1
Recent developments have yielded significant progress towards systematically understanding loop corrections to de Sitter (dS) correlators. In close analogy with physics in Anti-de…
Primordial Non-Gaussianity from Light Compact Scalars
Priyesh Chakraborty
We study the non-Gaussianities generated by light axions, or compact scalar fields, during inflation. To correctly calculate their impact on primordial statistics, we will argue th…
Compact Scalars at the Cosmological Collider
Priyesh Chakraborty, John Stout
We study the dynamics of scalar fields with compact field spaces, or axions, in de Sitter space. We argue that the field space topology can qualitatively affect the physics of thes…
Light Scalars at the Cosmological Collider
Priyesh Chakraborty, John Stout
We study the self-energies of weakly interacting scalar fields in de Sitter space with one field much lighter than the Hubble scale. We argue that self-energies drastically simplif…