374 citations · 1.6k across the 34 of their papers we have counts for
34 papers
Spinodal Instabilities and Super-Planckian Excursions in Natural Inflation
Andreas Albrecht, R. Holman, Benoit J. Richard
Models such as Natural Inflation that use Pseudo-Nambu-Goldstone bosons (PNGB's) as the inflaton are attractive for many reasons. However, they typically require trans-Planckian fi…
Renormalizing an initial state
Hael Collins, R. Holman, Tereza Vardanyan
The intricate machinery of perturbative quantum field theory has largely been devoted to the 'dynamical' side of the theory: simple states are evolved in complicated ways. This art…
A Cosmological Slavnov-Taylor Identity
Hael Collins, R. Holman, Tereza Vardanyan
We develop a method for treating the consistency relations of inflation that includes the full time-evolution of the state. This approach relies only on the symmetries of the infla…
Do Mixed States save Effective Field Theory from BICEP?
Hael Collins, R. Holman, Tereza Vardanyan
The BICEP2 collaboration has for the first time observed the B-mode polarization associated with inflationary gravitational waves. Their result has some discomfiting implications f…
What is the shape of the initial state?
Nishant Agarwal, R. Holman, Andrew J. Tolley
We argue that a plausible operational definition for an initial state of the Universe is the initial quantum state of the curvature perturbations generated during inflation. We pro…
Effective field theory in time-dependent settings
Hael Collins, R. Holman, Andreas Ross
We use the in-in or Schwinger-Keldysh formalism to explore the construction and interpretation of effective field theories for time-dependent systems evolving out of equilibrium. S…