528 citations · 7.5k across the 142 of their papers we have counts for
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The Ostrogradskian Instability of Lagrangians with Nonlocality of Finite Extent
R. P. Woodard
I reply to the objections recently raised by J. Llosa to my constructive proof that Lagrangians with nonlocality of finite extent inherit the full Ostrogradskian instability.
Plane waves in a general Robertson-Walker background
N. C. Tsamis, R. P. Woodard
We present an exact solution for the plane wave mode functions of a massless, minimally coupled scalar propagating in an arbitrary homogeneous, isotropic and spatially flat geometr…
One Loop Vaccum Polarization in a Locally de Sitter Background
T. Prokopec, O. Tornkvist, R. P. Woodard
We compute the one loop vacuum polarization from massless, minimally coupled scalar QED in a locally de Sitter background. Gauge invariance is maintained through the use of dimensi…
Photon mass from inflation
Tomislav Prokopec, Ola Tornkvist, Richard Woodard
We consider vacuum polarization from massless scalar electrodynamics in de Sitter inflation. The theory exhibits a 3+1 dimensional analogue of the Schwinger mechanism in which a ph…