206 citations · 420 across the 10 of their papers we have counts for
5 papers · 1 filter
Graviton one-loop effective action and inflationary dynamics
Tomas Janssen, Shun-Pei Miao, Tomislav Prokopec
We consider the one-loop effective action due to gravitons in a FLRW background with constant epsilon=-(dH/dt)/H^2. By expanding around epsilon=0 (corresponding to an expansion aro…
Hermitian Gravity and Cosmology
Christiaan Mantz, Tomislav Prokopec
In an attempt to generalize general relativity, we propose a new Hermitian theory of gravity. Space-time is generalized to space-time-momentum-energy and both the principles of gen…
Two loop stress-energy tensor for inflationary scalar electrodynamics
Tomislav Prokopec, Nicholas C. Tsamis, Richard P. Woodard
We calculate the expectation value of the coincident product of two field strength tensors at two loop order in scalar electrodynamics on de Sitter background. The result agrees wi…
The Scalar Field Kernel in Cosmological Spaces
Jurjen F. Koksma, Tomislav Prokopec, Gerasimos I. Rigopoulos
We construct the quantum mechanical evolution operator in the Functional Schrodinger picture - the kernel - for a scalar field in spatially homogeneous FLRW spacetimes when the fie…
Stochastic Inflationary Scalar Electrodynamics
T. Prokopec, N. C. Tsamis, R. P. Woodard
We stochastically formulate the theory of scalar quantum electrodynamics on a de Sitter background. This reproduces the leading infrared logarithms at each loop order. It also allo…