240 citations · 2.5k across the 73 of their papers we have counts for
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Large Diffeomorphisms and Accidental Symmetry of the Extremal Horizon
Achilleas P. Porfyriadis, Grant N. Remmen
We uncover a symmetry of the linear Einstein equations near extremal horizons. Specifically, acting with a spherically symmetric linearized diffeomorphism on the perturbative solut…
Exploration of a Singular Fluid Spacetime
Grant N. Remmen
We investigate the properties of a special class of singular solutions for a self-gravitating perfect fluid in general relativity: the singular isothermal sphere. For arbitrary con…
Causality, Unitarity, and the Weak Gravity Conjecture
Nima Arkani-Hamed, Yu-tin Huang, Jin-Yu Liu +1
We consider the shift of charge-to-mass ratio for extremal black holes in the context of effective field theory, motivated by the Weak Gravity Conjecture. We constrain extremality…
Amplitudes and the Riemann Zeta Function
Grant N. Remmen
Physical properties of scattering amplitudes are mapped to the Riemann zeta function. Specifically, a closed-form amplitude is constructed, describing the tree-level exchange of a…
Entanglement Wedge Cross Section Inequalities from Replicated Geometries
Ning Bao, Aidan Chatwin-Davies, Grant N. Remmen
We generalize the constructions for the multipartite reflected entropy in order to construct spacetimes capable of representing multipartite entanglement wedge cross sections of di…
Horizon Acoustics of the GHS Black Hole and the Spectrum of
Achilleas P. Porfyriadis, Grant N. Remmen
We uncover a novel structure in Einstein-Maxwell-dilaton gravity: an solution in string frame, which can be obtained by a near-horizon limit of the extreme…
Holevo Information of Black Hole Mesostates
Ning Bao, Jonathan Harper, Grant N. Remmen
We define a bulk wormhole geometry interpolating between horizons of differing size and determine characteristics of the HRT surface in these geometries. This construction is dual…