251 citations · 641 across the 13 of their papers we have counts for
14 papers
A Universal Kaluza-Klein Graviton Cascade Rate
Vincent S. H. Lee, Lisa Randall, Marcos Riojas
We obtain a general decay rate between Kaluza-Klein (KK) gravitons, resolving an ambiguity in the literature concerning these decays. The amplitude is determined not only by the ma…
As Cold as a Black Hole: Extended Photon Spheres
Marcos Riojas
It is widely believed that self-gravitating radiation cannot reach thermal equilibrium with a black hole in asymptotically flat spacetime. We describe a marginally stable continuum…
On Black Holes Surrounded by Radiation II: Thermodynamics
Marcos Riojas, Matthew J. Strassler
In a companion paper we considered a Schwarzschild black hole of mass enveloped by a thick "ocean" of massless particles that extends the black hole's photon sphere into a regi…
On Black Holes Surrounded by Radiation: I. Classical Considerations
Marcos Riojas, Matthew J. Strassler
We consider spherically symmetric static solutions to Einstein's equations describing a Schwarzschild black hole enveloped by a thick shell of orbiting massless particles with zero…
Seeing Page Curves and Islands with Blinders On
Hao Geng, Andreas Karch, Carlos Perez-Pardavila +3
This paper summarizes recent discussions of the Page curve and the information paradox, and responds to the reasoning and examples from arXiv:2506.04311. We review arguments demons…
Branes Screening Quarks and Defect Operators
Andreas Karch, Marcos Riojas
Here we generalize a well-known computation and uncover a phase-transition, showing that Wilson lines do not necessarily exhibit Coulomb scaling laws in AdS/BCFT at zero temperatur…
The Photon Sphere and Response Functions in Holography
Marcos Riojas, Hao-Yu Sun
In this letter, we show the Unruh temperature of the photon sphere for an AdS-Schwarzschild black hole can be determined holographically from the retarded Green's function and…
The Photon Sphere and the AdS/CFT Correspondence
Marcos Riojas, Hao-Yu Sun
The AdS/CFT correspondence connects bulk fields to boundary operators characterized by source frequency and angular momentum . Here we explore their connec…
Constraining braneworlds with entanglement entropy
Hao Geng, Andreas Karch, Carlos Perez-Pardavila +4
We propose swampland criteria for braneworlds viewed as effective field theories of defects coupled to semiclassical gravity. We do this by exploiting their holographic interpretat…
Subregion Entropy for the Doubly Holographic Global Black String
Andreas Karch, Carlos Perez-Pardavila, Marcos Riojas +1
We study the growth of entanglement entropy in a doubly holographic model of gravity for a spherical AdS black hole. Compared to previous work, which was limited to the case of pla…
Jackiw-Teitelboim Gravity from the Karch-Randall Braneworld
Hao Geng, Andreas Karch, Carlos Perez-Pardavila +4
In this letter, we show that Jackiw-Teitelboim (JT) gravity can be naturally realized in the Karch-Randall braneworld. Notably the role of the dilaton in JT gravity is played by th…
Entanglement Phase Structure of a Holographic BCFT in a Black Hole Background
Hao Geng, Andreas Karch, Carlos Perez-Pardavila +4
We compute holographic entanglement entropy for subregions of a BCFT thermal state living on a nongravitating black hole background. The system we consider is doubly holographic an…
Inconsistency of Islands in Theories with Long-Range Gravity
Hao Geng, Andreas Karch, Carlos Perez-Pardavila +4
In ordinary gravitational theories, any local bulk operator in an entanglement wedge is accompanied by a long-range gravitational dressing that extends to the asymptotic part of th…
Information Transfer with a Gravitating Bath
Hao Geng, Andreas Karch, Carlos Perez-Pardavila +4
Late-time dominance of entanglement islands plays a critical role in addressing the information paradox for black holes in AdS coupled to an asymptotic non-gravitational bath. A na…