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Effective field theory of degenerate higher-order inflation
Hayato Motohashi, Wayne Hu
We extend the effective field theory of inflation to a general Lagrangian constructed from Arnowitt-Deser-Misner variables that encompasses the most general interactions with up to…
Swampland Conjectures and Late-Time Cosmology
Marco Raveri, Wayne Hu, Savdeep Sethi
We discuss the cosmological implications of the string swampland conjectures for late-time cosmology, and test them against a wide range of state of the art cosmological observatio…
Generalized Slow Roll in the Unified Effective Field Theory of Inflation
Hayato Motohashi, Wayne Hu
We provide a compact and unified treatment of power spectrum observables for the effective field theory (EFT) of inflation with the complete set of operators that lead to second-or…
Double screening
Pierre Gratia, Wayne Hu, Austin Joyce +1
Attempts to modify gravity in the infrared typically require a screening mechanism to ensure consistency with local tests of gravity. These screening mechanisms fit into three broa…
Self-accelerating Massive Gravity: Hidden Constraints and Characteristics
Pavel Motloch, Wayne Hu, Hayato Motohashi
Self-accelerating backgrounds in massive gravity provide an arena to explore the Cauchy problem for derivatively coupled fields that obey complex constraints which reduce the phase…
Self-accelerating Massive Gravity: Superluminality, Cauchy Surfaces and Strong Coupling
Pavel Motloch, Wayne Hu, Austin Joyce +1
Self-accelerating solutions in massive gravity provide explicit, calculable examples that exhibit the general interplay between superluminality, the well-posedness of the Cauchy pr…