[institut] Group for Gravitation, Particles and Fields seminar, September 12th 2025

[Branislav Cvetkovic]

Dear colleagues,

You are cordially invited to the seminar of the Group for Gravitation, 
Particles and Fields, which will be held on Friday, September 12th , at 
11:00 at the Institute of Physics Belgrade, lecture hall 360.
The talk is entitled0

"Translation invariant' black hole: autoparallels and complete 
integrability"


Abstract: 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).

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Time: September 12, 2025 11:00 Belgrade

Institute of Physics Belgrade, lecture hall 360, 2nd floor

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Best regards,
Branislav Cvetkovic

-- 
Institute of Physics Belgrade
Pregrevica 118, 11080 Belgrade, Serbia
http://www.ipb.ac.rs/