40 citations · 134 across the 4 of their papers we have counts for
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hep-th2020★ 33 cited
The Cosmological Phonon: Symmetries and Amplitudes on Sub-Horizon Scales
Tanguy Grall, Sadra Jazayeri, David Stefanyszyn
In contrast to massless spinning particles, scalars are not heavily constrained by unitarity and locality. Off-shell, no gauge symmetries are required to write down manifestly loca…
gr-qc2020★ 40 cited
Inflation in Motion: Unitarity Constraints in Effective Field Theories with Broken Lorentz Symmetry
Tanguy Grall, Scott Melville
During inflation, there is a preferred reference frame in which the expansion of the background spacetime is spatially isotropic. In contrast to Minkowski spacetime, observables ca…