65 citations · 149 across the 6 of their papers we have counts for
6 papers
The Quantum Mechanics of Rare Events: From Quantum Walks to Stochastic Inflation
Daniel Green, Kshitij Gupta, Akhil Premkumar
Rare fluctuations in physical systems depend on the detailed microphysics responsible for the fluctuations. In classical statistical systems, the large deviation principle has eluc…
Large Deviations in the Early Universe
Timothy Cohen, Daniel Green, Akhil Premkumar
Fluctuations play a critical role in cosmology. They are relevant across a range of phenomena from the dynamics of inflation to the formation of structure. In many cases, these flu…
A Tail of Eternal Inflation
Timothy Cohen, Daniel Green, Akhil Premkumar
Non-trivial inflaton self-interactions can yield calculable signatures of primordial non-Gaussianity that are measurable in cosmic surveys. Surprisingly, we find that the phase tra…
Regulating loops in de Sitter spacetime
Akhil Premkumar
Perturbative quantum field theory (QFT) calculations in de Sitter space are riddled with contributions that diverge over time. These contributions often arise from loop integrals,…
Stochastic Inflation at NNLO
Timothy Cohen, Daniel Green, Akhil Premkumar +1
Stochastic Inflation is an important framework for understanding the physics of de Sitter space and the phenomenology of inflation. In the leading approximation, this approach resu…
Dynamical RG and Critical Phenomena in de Sitter Space
Daniel Green, Akhil Premkumar
Perturbative quantum field theory in de Sitter space is known to give rise to a variety of contributions that diverge with time (secular terms). Despite significant progress, a com…