5 papers
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. The following observation is used to desc…
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 reg…
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…