У оквиру семинара Групе за гравитацију, честице и поља у петак, 12. септембра 2025. године у 11 часова у сали 360 Института за физику у Београду, др Јенс Бос (Институт за технологију у Карлсруеу) одржаће предавање:
Translation invariant’ black hole: autoparallels and complete integrability
САЖЕТАК:
We consider the autoparallel motion of test bodies in static, spherically symmetric spacetimes with torsion. We prove complete integrability of such motion for a wide range of off-shell geometries via four commuting autoparallel Killing vectors. Since these vectors reduce to translation generators in a certain limit, we refer to these geometries as `translation invariant.’ Invoking the field equations of quadratic Poincaré gauge gravity we re-derive an exact Schwarzschild black hole solution endowed with a non trivial torsion field scaling as GM/r^2, where M denotes the ADM mass of the black hole. Studying the qualitative orbital dynamics via effective potentials we find notable discrepancies between autoparallels (straightest possible paths) and geodesics (shortest possible paths).