160 citations · 1.3k across the 29 of their papers we have counts for
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Double-copy towards supergravity inflation with -attractor models
John Joseph M. Carrasco, Matthew Lewandowski, Nicolas H. Pavao
Key to the simplicity of supergravity -attractor models of inflation are Volkov-Akulov fermions, often in the form of nilpotent superfields. Here we explore the possibility of u…
The Color-Dual Fates of , , and Supergravity
John Joseph M. Carrasco, Matthew Lewandowski, Nicolas H. Pavao
We find that the duality between color and kinematics can be used to inform the high energy behavior of effective field theories. Namely, we demonstrate that the massless gauge the…
Gravitational Causality and the Self-Stress of Photons
Brando Bellazzini, Giulia Isabella, Matthew Lewandowski +1
We study causality in gravitational systems beyond the classical limit. Using on-shell methods, we consider the one-loop corrections from charged particles to the photon energy-mom…
Amplitudes' Positivity, Weak Gravity Conjecture, and Modified Gravity
Brando Bellazzini, Matthew Lewandowski, Javi Serra
We derive new positivity bounds for scattering amplitudes in theories with a massless graviton in the spectrum in four spacetime dimensions, of relevance for the weak gravity conje…
Leading slow roll corrections to the volume of the universe and the entropy bound
Matthew Lewandowski, Ashley Perko
We make an extension to recent calculations of the probability density ρ(V) for the volume of the universe after inflation. Previous results have been accurate to leading order in…
Anomalous Dimensions and Non-Gaussianity
Daniel Green, Matthew Lewandowski, Leonardo Senatore +2
We analyze the signatures of inflationary models that are coupled to strongly interacting field theories, a basic class of multifield models also motivated by their role in providi…
Doppelganger defects
Melinda Andrews, Matt Lewandowski, Mark Trodden +1
We study k-defects - topological defects in theories with more than two derivatives and second-order equations of motion - and describe some striking ways in which these defects bo…