Beyond Black Holes: Uniqueness Properties of Ultra-Massive Spacetimes - Lecture

Explore the fascinating realm of ultra-massive spacetimes in this 46-minute conference talk by Jose M M Senovilla, presented at the Workshop on "Non-regular Spacetime Geometry" at the Erwin Schrödinger International Institute for Mathematics and Physics. Delve into the unique properties of spacetimes with a positive cosmological constant and discover how they can contain stable marginally trapped surfaces (MTS) with areas approaching a finite bound. Learn about the universal characteristics these spacetimes acquire, including generalized holographic screens and their composition of dynamical horizon and timelike membrane portions. Examine the concept of ultra-massive spacetimes and their potential to overcome the repulsive force of the cosmological constant, resulting in a collapsing universe without an event horizon. Investigate the implications of these findings through various examples and discussions on topics such as the Cutler Metric, black hole formation, and the stability operator. Gain insights into the cutting-edge research that challenges our understanding of spacetime geometry and pushes the boundaries of theoretical physics.