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- Indico Weeks View
Einstein’s General Relativity has profoundly shaped our understanding of gravitational interactions, providing a remarkably successful description of gravity across diverse scales. Yet, key unresolved questions about the fundamental nature of gravity suggest the necessity of extending Einstein's framework to incorporate quantum principles. Despite decades of effort, a complete quantum theory of gravity remains elusive. In this talk, I will present investigations into various quantum-gravity effects in distinct scenarios, highlighting their implications for black-hole horizons, spacetime singularities, and observable phenomenology. Notably, quantum corrections can stabilize event horizons and resolve singularities, transforming them into structures such as traversable wormholes in certain models. Non-singular black holes, in turn, exhibit intriguing features, including “quantum hair” and phase transitions, which may shed light on the longstanding black-hole information paradox. Beyond theoretical insights, I will discuss how these quantum-gravitational signatures might be probed experimentally, from near-horizon physics (using black-hole shadows, motion of stars around black holes and gravitational-wave data) up to, quite unexpectedly, cosmology.