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Single-Minus Graviton Amplitudes from Matrix Theory
Alfredo Guevara, Alexandru Lupsasca, Juan Maldacena +1
The -point single-minus graviton amplitudes are nonzero in a special kinematic region that preserves some supersymmetry when embedded in supergravity. We compute these amplitude…
Single-minus graviton tree amplitudes are nonzero
Alfredo Guevara, Alexandru Lupsasca, David Skinner +2
Single-minus tree-level -graviton scattering amplitudes are revisited. Often presumed to vanish, they are shown here to be nonvanishing for certain "half-collinear" configuratio…
Single-minus gluon tree amplitudes are nonzero
Alfredo Guevara, Alexandru Lupsasca, David Skinner +2
Single-minus tree-level -gluon scattering amplitudes are reconsidered. Often presumed to vanish, they are shown here to be nonvanishing for certain "half-collinear" configuratio…
Photon rings in a holographic toy model
Stéphane Detournay, Sahaja Kanuri, Alexandru Lupsasca +3
Light circling around an astrophysical black hole can spend a long time skirting its unstably bound photon orbits before escaping to infinity. To a distant observer, this orbiting…
Black hole bulk-cone singularities
Matthew Dodelson, Cristoforo Iossa, Robin Karlsson +2
Lorentzian correlators of local operators exhibit surprising singularities in theories with gravity duals. These are associated with null geodesics in an emergent bulk geometry. We…
Extreme Black Hole Anabasis
Shahar Hadar, Alexandru Lupsasca, Achilleas P. Porfyriadis
We study the transformation properties of spherically symmetric perturbations of the Bertotti-Robinson universe and identify an invariant that characterizes th…