9 papers
On the amplitude expansion of gluon correlators in
Humberto Gomez, Renann Lipinski Jusinskas, Arthur Lipstein +1
We show that tree-level gluon correlators in admit a natural expansion in terms of flat-space scattering amplitudes at all multiplicities. In particular, every …
Carrollian ABJM: Fermions and Supersymmetry
Arjun Bagchi, Arthur Lipstein, Saikat Mondal +1
A natural approach for constructing a concrete example of flat space holography is to take the flat space limit of a well-understood example of AdS/CFT, such as the one relating M-…
Hidden Conformal Symmetry in AdSS Beyond Tree Level
P. J. Heslop, A. E. Lipstein, M. Santagata
Correlators of a certain one-dimensional superconformal field theory dual to hypermultiplets in AdSS exhibit a hidden four-dimensional conformal symmetry which allows…
Cosmological Dressing Rules
Chandramouli Chowdhury, Arthur Lipstein, Joe Marshall +2
The basic observables in cosmology are known as in-in correlators. Recent calculations have revealed that in-in correlators in four dimensional de Sitter space exhibit hidden simpl…
Cosmological Correlator Discontinuities from Scattering Amplitudes
Chandramouli Chowdhury, Sadra Jazayeri, Arthur Lipstein +3
Recent theoretical work has revealed that basic observables of quantum field theory in de Sitter space, known as in-in or cosmological correlators, exhibit surprisingly simple math…
On in-in correlators for spinning theories and their shadow formulation
Chandramouli Chowdhury, Arthur Lipstein, Joe Marshall +1
In-in correlators are the basic observables in cosmology and are traditionally computed using the Schwinger-Keldysh formalism. In this paper we revisit this formalism for photons,…