3 papers
gr-qc2026
Radiative Signatures from Warp Drives Traveling Through the Earth's Atmosphere
Shaun David Brocus Fell, Abraham Loeb
We investigate the observable signatures of zero ADM mass warp drive spacetimes traversing Earth's atmosphere. Numerical simulations indicate that an aircraft-scale spacetime bubbl…
gr-qc2025
Inconsistency with De Sitter Spacetime in a New Approach to Gravitational Particle Production
Mark P. Hertzberg, Abraham Loeb
We study a claimed new mechanism for particle production and black hole evaporation through a spatially dependent temperature. This new temperature is comparable to the Hawking res…
hep-ph2025
Properties of Ultralight Bosons from Spins of Heavy Quasars via Superradiance
Caner Unal, Fabio Pacucci, Abraham Loeb
The mass and the spin of accreting and jetted black holes, at the center of Active Galactic Nuclei (AGNs), can be probed by analyzing their electromagnetic spectra. For this purpos…