6 papers
From Gross-Manes to Alday-Maldacena
Leonardo Pipolo de Gioia, Sabrina Pasterski, Pedro Vieira
Minimal surfaces govern the classical limit of several important observables in string theory. Two basic examples are the Gross--Manes saddle for high-energy string scattering in f…
Asymptotic charges as detectors and the memory effect in massive QED and perturbative quantum gravity
Brett Oertel, Ian Moult, Sabrina Pasterski
It has been shown that there are an infinite set of asymptotic symmetries in quantum gravity and QED, and this has been extended to dressed states in some cases. Here we rederive t…
Memory Correlators and Ward Identities in the 'in-in' Formalism
Ian Moult, Sruthi A. Narayanan, Sabrina Pasterski
The symmetries of asymptotically flat spacetimes impose constraints on observables at infinity. The consequences of this have been extensively explored for S-matrix elements, where…
Multiparticle Contributions to the Celestial OPE
Alfredo Guevara, Yangrui Hu, Sabrina Pasterski
We start by defining two-particle operators that appear in celestial CFT. We then show how to compute their OPE coefficients with the known single-particle operators at tree level…
Multiparticle States for the Flat Hologram
Justin Kulp, Sabrina Pasterski
We use the extrapolate dictionary to revisit the spectrum of operators in Celestial CFT. Under the Celestial CFT map, each state in the 4D Hilbert space should map to one in the 2D…
A Comment on Boundary Correlators: Soft Omissions and the Massless S-Matrix
Eivind Jørstad, Sabrina Pasterski
We revisit the extrapolate dictionary for massless scattering in flat spacetime and identify a soft contribution that is typically dropped from the saddle point approximation. We s…