5 papers
The mini-Page Curve in Cosmology
Ricardo Espíndola, Shoichiro Miyashita
The black hole information paradox has motivated extensive study of how and when information escapes from evaporating black holes. Here we address the analogous question for cosmol…
Spectral Admissibility of Real Observers in Euclidean de Sitter Gravity
Ricardo Espíndola, Ahmed Farag Ali
The Euclidean de Sitter path integral contains the familiar phase associated with conformal negative modes. Maldacena's construction shows that a suitably included real observer ca…
Islands and traversable wormholes
Ricardo Espíndola, Viktor Jahnke, Keun-Young Kim
We study information recovery in black hole evaporation using traversable wormhole protocols in AdS Jackiw-Teitelboim gravity with matter fields coupled to an external bath. By…
Flow-geometry microstates
Ricardo Espíndola, Shoichiro Miyashita
We construct geometric microstates for a class of two-dimensional flow geometriesspacetimes that interpolate from an asymptotic AdS boundary to a dS static patch in the…
Islands in FRW Cosmologies
Ricardo Espíndola, Bahman Najian, Dora Nikolakopoulou
We search for candidate island regions in FRW cosmologies supported by radiation, cosmological constant , and non-zero spatial curvature. The radiation is assumed to be in a the…