148 citations · 1.2k across the 38 of their papers we have counts for
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Black holes in asymptotically safe gravity and beyond
Astrid Eichhorn, Aaron Held
Asymptotically safe quantum gravity is an approach to quantum gravity that achieves formulates a standard quantum field theory for the metric. Therefore, even the deep quantum grav…
Instability of spherically-symmetric black holes in Quadratic Gravity
Aaron Held, Jun Zhang
We investigate the linear stability of the two known branches of spherically-symmetric black holes in Quadratic Gravity. We extend previous work on the long-wavelength (Gregory-Laf…
Quantum gravity lights up spinning black holes
Astrid Eichhorn, Aaron Held
Quantum-gravity effects in black holes are generally expected to be unobservable if they set in at transplanckian curvature scales. Here, we challenge this expectation. A near-crit…
Horizonless spacetimes as seen by present and next-generation Event Horizon Telescope arrays
Astrid Eichhorn, Roman Gold, Aaron Held
We study the capabilities of present and future radio very-long-baseline-interferometry arrays to distinguish black holes from horizonless spacetimes. We consider an example of a h…
Dynamically vanishing Dirac neutrino mass from quantum scale symmetry
Astrid Eichhorn, Aaron Held
We present a mechanism which drives Dirac neutrino masses to tiny values along the Renormalization Group flow, starting from an asymptotically safe ultraviolet completion of the th…
Grand unification and the Planck scale: An example of radiative symmetry breaking
Aaron Held, Jan Kwapisz, Lohan Sartore
Grand unification of gauge couplings and fermionic representations remains an appealing proposal to explain the seemingly coincidental structure of the Standard Model. However, to…