Speaker
Description
In this talk the investigation of the gravitational dust collapse within the framework of effective loop quantum gravity will be addressed with a special focus on the properties and the formation of shell-crossing singularities in these models. The specific effective gravitational collapse model that will be discussed in this talk is based on the cosmological Hamiltonian derived from full LQG by Dapor and Liegener using coherent state techniques in the AQG framework for LQG. This model is characterized by an unsymmetric bounce as its central feature. The investigation of the resulting effective dynamics will be presented in detail and differences and similarities compared to other existing models will be discussed. In a broader context, the question of the existence of shell-crossing singularities is investigated beyond the specific model, including also models subject to unbounded polymerisation functions, such as the regular black hole models of Bardeen and Hayward.
