Gravity in quantum space-time

摘要

The literature on quantum-gravity-inspired scenarios for the quantization of spacetime has so far focused on particle-physics-like studies. This is partly justified by the present limitations of our understanding of quantum gravity theories, but we here argue that valuable insight can be gained through semi-heuristic analyses of the implications for gravitational phenomena of some results obtained in the quantum spacetime literature. In particular, we show that the types of description of particle propagation that emerged in certain quantum spacetime frameworks have striking implications for gravitational collapse and for the behavior of gravity at large distances.