60 citations · 352 across the 21 of their papers we have counts for
5 papers · 1 filter
Mixed signals in the IR: Positivity bounds with indefinite species
Claudia de Rham, Sumer Jaitly, Greg Kaplanek
In theories with multiple particle species standard fixed-t positivity bounds do not directly apply to 2-to-2 definite species scattering amplitudes when the initial and final stat…
Gauging Open EFTs from the top down
Greg Kaplanek, Maria Mylova, Andrew J. Tolley
We present explicit top-down calculations of Open EFTs for gauged degrees of freedom with a focus on the effects of gauge fixing. Starting from the in-in contour with two copies of…
Cosmic Lockdown: When Decoherence Saves the Universe from Tunneling
Robson Christie, Jaewoo Joo, Greg Kaplanek +2
We investigate how quantum decoherence influences the tunneling dynamics of quantum fields in cosmological spacetimes. Specifically, we study a scalar field in an asymmetric double…
Inflationary Decoherence from the Gravitational Floor
C. P. Burgess, R. Holman, Greg Kaplanek
We re-examine the decoherence rate of primordial fluctuations within minimal inflationary models, using only the gravitational interactions required for the underlying fluctuation-…
Lindblad evolution as gradient flow
Greg Kaplanek, Alexander Maloney, Jason Pollack +1
We give a simple argument that, for a large class of jump operators, the Lindblad evolution can be written as a gradient flow in the space of density operators acting on a Hilbert…