У оквиру семинара Групе за гравитацију, честице и поља, у петак, 15. маја 2026. године у 11 часова у сали 360 Института за физику у Београду, Стефан Катић (Институт за физику у Београду) одржаће предавање:
The Structure of Cauchy Surfaces for an Evaporating Black Hole and the Information Loss Paradox
САЖЕТАК:
In this talk, we analyze the causal structure of an evaporating black hole space-time and its connection to the black hole information loss paradox. Namely, we elaborate Tim Maudlin’s idea that the inclusion of the evaporation event into the space-time yields disconnected Cauchy surfaces. We do this by analyzing important theorems concerning Cauchy surfaces and global hyperbolicity, and their application to the evaporating black hole space-time. We will make a distinction between two types of evaporating black hole space-times, depending on whether the evaporation event is included or not, and we will see that some of those theorems don’t apply to one of these them. We won’t give a mathematically rigorous proof, but we will state a theorem which suggests a mathematical legitimacy of Maudlin’s idea. After that, we will comment briefly on the entanglement entropy of disconnected Cauchy surfaces.