5 papers
Logarithmic gravity from a very slow roll limit of inflation
Jordan Cotler, Victor Ivo, Juan Maldacena
We study the inflationary no-boundary wavefunction in a ``linear-roll limit,'' in which while the Hubble scale and the slope of the inflaton potential are held fixe…
Renormalon Saddles in the OPE
Arindam Bhattacharya, Jordan Cotler, Aurélien Dersy +1
The cancellation of renormalon ambiguities in the operator product expansion is usually formulated as a matching between perturbative Borel ambiguities and prescription dependence…
Higher-loop norm of the no-boundary state
Jordan Cotler
The leading contribution to the de Sitter no-boundary state comes from geometries with spherical spatial slices, including the Hartle-Hawking geometry and fluctuations around it. R…
Renormalons as Saddle Points
Arindam Bhattacharya, Jordan Cotler, Aurélien Dersy +1
Instantons and renormalons play important roles at the interface between perturbative and non-perturbative quantum field theory. They are both associated with branch points in the…
The Collective Coordinate Fix
Arindam Bhattacharya, Jordan Cotler, Aurélien Dersy +1
Collective coordinates are frequently employed in path integrals to manage divergences caused by fluctuations around saddle points that align with classical symmetries. These coord…