303 citations · 1.4k across the 24 of their papers we have counts for
5 papers · 1 filter
Reconstructing Classical Spacetimes from the S-Matrix in Twistor Space
Alfredo Guevara
We present a holographic construction of solutions to the gravitational wave equation starting from QFT scattering amplitudes. The construction amounts to a change of basis from mo…
Black Holes in Klein Space
Erin Crawley, Alfredo Guevara, Noah Miller +1
The analytic continuation of the general signature Lorentzian Kerr-Taub-NUT black holes to signature Kleinian black holes is studied. Their global structure is char…
Celestial OPE blocks
Alfredo Guevara
Starting from the defining two-point and three-point functions of Celestial CFTs, Euclidean integral blocks are constructed for the OPE of scalar primaries. In their integral form…
Scattering in Black Hole Backgrounds and Higher-Spin Amplitudes: Part I
Yilber Fabian Bautista, Alfredo Guevara, Chris Kavanagh +1
The scattering of massless waves of helicity in Schwarzschild and Kerr backgrounds is revisited in the long-wavelenght regime. Using a novel description of su…
Holographic Symmetry Algebras for Gauge Theory and Gravity
Alfredo Guevara, Elizabeth Himwich, Monica Pate +1
All 4D gauge and gravitational theories in asymptotically flat spacetimes contain an infinite number of non-trivial symmetries. They can be succinctly characterized by generalized…