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Gravitational ringing of rotating black holes in higher-derivative gravity
Pablo A. Cano, Kwinten Fransen, Thomas Hertog +1
We study gravitational perturbations of slowly-rotating black holes in a general effective-field-theory extension of general relativity that includes up to eight-derivative terms.…
Islands in Multiverse Models
Sergio E. Aguilar-Gutierrez, Aidan Chatwin-Davies, Thomas Hertog +2
We consider multiverse models in two-dimensional linear dilaton-gravity theories as toy models of false vacuum eternal inflation. Coupling conformal matter we calculate the Von Neu…
Fuzzball Shadows: Emergent Horizons from Microstructure
Fabio Bacchini, Daniel R. Mayerson, Bart Ripperda +4
We study the physical properties of four-dimensional, string-theoretical, horizonless "fuzzball" geometries by imaging their shadows. Their microstructure traps light rays straying…
Cosmic eggs to relax the cosmological constant
Thomas Hertog, Rob Tielemans, Thomas Van Riet
In theories with extra dimensions, the cosmological hierarchy problem can be thought of as the unnaturally large radius of the observable universe in Kaluza-Klein units. We sketch…