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27/10/2025, 09:00
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Florian Kühnel (MPP & LMU Munich)27/10/2025, 09:05
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Gia Dvali27/10/2025, 09:30
The "memory burden" effect implies that the black hole's quantum information load, which is invisible in black hole's ground state and traditionally has not been paid the deserved attention, exerts macroscopic effects on perturbed black holes. First, it tends to stabilize a black hole against the Hawking evaporation, leading to dramatic consequences for PBH dark matter. Even more...
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Sebastian Zell (Ludwig Maximilian University & Max Planck Institute for Physics, Munich)27/10/2025, 09:55
Mounting theoretical evidence suggests that the information stored in black holes suppresses their decay rate. This quantum effect of memory burden opens up a new window for small primordial black holes (PBHs) below $10^{15}\,{\rm g}$ as dark matter candidates. In this talk, I show that the smooth transition from semi-classical evaporation to the memory-burdened phase strongly impacts...
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Manuel Ettengruber (Max-Planck-Institut für Physik (Werner-Heisenberg-Institut))27/10/2025, 10:10
The fundamental scale of gravity could be significantly lower than the Planck scale due to the existence of a large number of particle species. This would also mean that processes exceeding this energy scale could produce black holes. In this talk, I will discuss two consequences of such a situation: first, the production of micro black holes in the corona of active galactic nuclei, together...
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Prof. Dieter Lüst27/10/2025, 10:50
We briefly revisit mechanisms for primordial black hole (PBH) production, namely inflation, phase transitions, and cosmic strings, in the context of the Dark Dimension Scenario, which is motivated by Swampland principles. Applying quantum gravity constraints, we demonstrate that any viable mechanism inevitably leads to the formation of five-dimensional PBHs. We comment on the observational...
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Ivano Basile (Max Planck Institute for Physics)27/10/2025, 11:15
The thermodynamics of large black holes is reliably described by semiclassical quantum gravity, and contains the seeds of holography. Generically, it cannot be extrapolated beyond the validity of gravitational effective field theory. In some special regimes this is possible, and leads to novel constraints on weakly coupled completions of gravity. I will present the framework and discuss how...
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Matilda Delgado (MPP & Harvard U.)27/10/2025, 11:30
Charged black hole solutions, which are ubiquitous in string theory, provide a natural setting for thought experiments probing the ultraviolet (UV) structure of quantum gravity. I will review recent progress in understanding how UV scales emerge in Effective Field Theories of quantum gravity, and explain how the attractor mechanism of charged black holes offers a controlled way to access UV...
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Carmine Montella (Max Planck Institute for Physics)27/10/2025, 11:45
Black holes remain one of the most fascinating windows into the quantum nature of gravity, yet their entropy is not fully captured by semiclassical considerations. Supersymmetric black holes, in particular, provide a controlled laboratory to explore subtle quantum effects and gain insights into more general black hole dynamics. In this work, we investigate genuinely non-perturbative...
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M. Sten Delos (Max Planck Institute for Astrophysics)27/10/2025, 13:15
Dark matter could consist of primordial black holes (PBHs). I present the first simulation of structure formation with PBH dark matter that self-consistently incorporates collisional few-body effects, post-Newtonian orbit corrections, orbital decay due to gravitational radiation, and black-hole mergers. An interesting phenomenology emerges in this simulation. Many-body interactions eject PBHs...
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Valentin Thoss (Ludwig-Maximilians-Universität München)27/10/2025, 13:40
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