Horizons and null infinity: A fugue in four voices
Abhay Ashtekar, Simone Speziale
Abstract
Black hole horizons in equilibrium and null infinity of asymptotically flat space-times are null 3-manifolds but have very different physical connotations. We first show that they share a large number of geometric properties, making them both weakly isolated horizons. We then use this new unified perspective to unravel the origin of the drastic differences in the physics they contain. Interestingly, the themes are woven together in a manner reminiscent of voices in a fugue.
Topics & Concepts
InfinityNull (SQL)Perspective (graphical)Pure mathematicsFugue (hash function)Space (punctuation)HorizonMathematicsTheoretical physicsPhysicsMathematical analysisComputer scienceLinguisticsPhilosophyGeometryStatisticsDatabaseBlack Holes and Theoretical PhysicsMathematical Dynamics and FractalsGeometric and Algebraic Topology