1.2k citations · 3.8k across the 50 of their papers we have counts for
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A Partially Massless Superconductor
Kurt Hinterbichler, Austin Joyce
We describe a Higgs mechanism for the partially massless graviton. In order to do so, we first construct a covariant fracton-like effective field theory on de Sitter space that lin…
Impossible Symmetries and Conformal Gravity
Kurt Hinterbichler, Austin Joyce, Grégoire Mathys
We explore the physics of relativistic gapless phases defined by a mixed anomaly between two generalized conserved currents. The gapless modes can be understood as Goldstone modes…
The graviton four-point function in de Sitter space
James Bonifacio, Harry Goodhew, Austin Joyce +2
We compute the tree-level late-time graviton four-point correlation function, and the related quartic wavefunction coefficient, for Einstein gravity in de Sitter spacetime. We deri…
Soft theorems for boosts and other time symmetries
Lam Hui, Austin Joyce, Ilia Komissarov +3
We derive soft theorems for theories in which time symmetries -- symmetries that involve the transformation of time, an example of which are Lorentz boosts -- are spontaneously bro…
Exploring Answers to Questions
Jonathan J. Heckman, Austin Joyce, Jeremy Sakstein +1
We explore potential uses of physics formulated in Kleinian (i.e., ) signature spacetimes as a tool for understanding properties of physics in Lorentzian (i.e., ) signatu…
Gravity as a gapless phase and biform symmetries
Kurt Hinterbichler, Diego M. Hofman, Austin Joyce +1
We study effective field theories (EFTs) enjoying (maximal) biform symmetries. These are defined by the presence of a conserved (electric) current that has the symmetries of a Youn…
Integrating out beyond tree level and relativistic superfluids
Austin Joyce, Alberto Nicolis, Alessandro Podo +1
We revisit certain subtleties of renormalization that arise when one derives a low-energy effective action by integrating out the heavy fields of a more complete theory. Usually th…
Near-Zone Symmetries of Kerr Black Holes
Lam Hui, Austin Joyce, Riccardo Penco +2
We study the near-zone symmetries of a massless scalar field on four-dimensional black hole backgrounds. We provide a geometric understanding that unifies various recently discover…
Snowmass White Paper: The Cosmological Bootstrap
Daniel Baumann, Daniel Green, Austin Joyce +4
This white paper summarizes recent progress in the cosmological bootstrap, an approach to the study of the statistics of primordial fluctuations from consistency with unitarity, lo…
Snowmass White Paper: Cosmology at the Theory Frontier
Raphael Flauger, Victor Gorbenko, Austin Joyce +3
The precision cosmological model describing the origin and expansion history of the universe, with observed structure seeded at the inflationary cosmic horizon, demands completion…
Soft limits of the wavefunction in exceptional scalar theories
Noah Bittermann, Austin Joyce
We study the structure of the flat space wavefunctional in scalar field theories with nonlinearly realized symmetries. These symmetries imply soft theorems that are satisfied by wa…
Exceptional scalar theories in de Sitter space
James Bonifacio, Kurt Hinterbichler, Austin Joyce +1
The special galileon and Dirac-Born-Infeld (DBI) theories are effective field theories of a single scalar field that have many interesting properties in flat space. These theories…
Linking the Singularities of Cosmological Correlators
Daniel Baumann, Wei-Ming Chen, Carlos Duaso Pueyo +3
Much of the structure of cosmological correlators is controlled by their singularities, which in turn are fixed in terms of flat-space scattering amplitudes. An important challenge…
Ladder Symmetries of Black Holes: Implications for Love Numbers and No-Hair Theorems
Lam Hui, Austin Joyce, Riccardo Penco +2
It is well known that asymptotically flat black holes in general relativity have a vanishing static, conservative tidal response. We show that this is a result of linearly realized…
Static response and Love numbers of Schwarzschild black holes
Lam Hui, Austin Joyce, Riccardo Penco +2
We derive the quadratic action for the physical degrees of freedom of massless spin-0, spin-1, and spin-2 perturbations on a Schwarzschild--(A)dS background in arbitrary dimensions…
The Cosmological Bootstrap: Spinning Correlators from Symmetries and Factorization
Daniel Baumann, Carlos Duaso Pueyo, Austin Joyce +2
We extend the cosmological bootstrap to correlators involving massless particles with spin. In de Sitter space, these correlators are constrained both by symmetries and by locality…
Matter Couplings and Equivalence Principles for Soft Scalars
James Bonifacio, Kurt Hinterbichler, Laura A. Johnson +2
Scalar effective field theories with enhanced soft limits behave in many ways like gauge theories and gravity. In particular, symmetries fix the structure of interactions and the t…
The Cosmological Bootstrap: Weight-Shifting Operators and Scalar Seeds
Daniel Baumann, Carlos Duaso Pueyo, Austin Joyce +2
A key insight of the bootstrap approach to cosmological correlations is the fact that all correlators of slow-roll inflation can be reduced to a unique building block---the four-po…
Shift-Symmetric Spin-1 Theories
James Bonifacio, Kurt Hinterbichler, Laura A. Johnson +1
We study interacting massive spin-1 theories in de Sitter (dS) and anti-de Sitter (AdS) space that possess shift symmetries parametrized by (A)dS Killing vectors. We show how they…
Shift Symmetries in (Anti) de Sitter Space
James Bonifacio, Kurt Hinterbichler, Austin Joyce +1
We construct a class of extended shift symmetries for fields of all integer spins in de Sitter (dS) and anti-de Sitter (AdS) space. These generalize the shift symmetry, galileon sy…
Shapes of gravity: Tensor non-Gaussianity and massive spin-2 fields
Garrett Goon, Kurt Hinterbichler, Austin Joyce +1
If the graviton is the only high spin particle present during inflation, then the form of the observable tensor three-point function is fixed by de Sitter symmetry at leading order…
Inflationary soft theorems revisited: A generalized consistency relation
Lam Hui, Austin Joyce, Sam S. C. Wong
We reconsider the derivation of soft theorems associated with nonlinearly-realized symmetries in cosmology. Utilizing the path integral, we derive a generalized consistency relatio…
Eikonal Scattering and Asymptotic Superluminality of Massless Higher Spin Fields
Kurt Hinterbichler, Austin Joyce, Rachel A. Rosen
We consider scattering of massless higher-spin particles in the eikonal regime in four dimensions. By demanding the absence of asymptotic superluminality, corresponding to positivi…
Massive and Massless Spin-2 Scattering and Asymptotic Superluminality
James Bonifacio, Kurt Hinterbichler, Austin Joyce +1
We constrain theories of a massive spin-2 particle coupled to a massless spin-2 particle by demanding the absence of a time advance in eikonal scattering. This is an -matrix con…