4 papers
Axion Perturbations: A General Analytical Treatment
Itamar J. Allali, Priyesh Chakraborty, JiJi Fan +1
Cosmological data provides us two key constraints on dark matter (DM): it must have a particular abundance, and it must have an adiabatic spectrum of density perturbations in the e…
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…
A Step in Flux to Suppress Axion Isocurvature
Priyesh Chakraborty, Junyi Cheng, Matthew Reece +1
The QCD axion in the pre-inflation scenario faces a stringent isocurvature constraint, which requires a relatively low Hubble scale during inflation. If the axion was heavier than…
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…