BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Francisco José Maldonado Torralba (University of Cape Town and Un iversity of Groningen) DTSTART:20201020T131500Z DTEND:20201020T144500Z DTSTAMP:20260423T004642Z UID:UTPhysics/4 DESCRIPTION:Title: Poincaré Gauge Gravity: stability\, phenomenology\, and prospects.\ nby Francisco José Maldonado Torralba (University of Cape Town and Univer sity of Groningen) as part of Theoretical physics seminar @ Tartu\n\nLectu re held in Physicum room A101\, University of Tartu\, Estonia.\n\nAbstract \nPoincaré Gauge Gravity is a theory quadratic in both curvature and tors ion\, which is constructed by requiring that the gravitational theory must be invariant under local Poincaré transformations. In this talk I will p resent the main outcomes of my PhD thesis related to this theory. First\, I will expose some results about the stability of the quadratic Poincaré Gauge Lagrangian\, and prove that only the two scalar degrees of freedom c an propagate without introducing pathologies. I will make emphasis on the form of the bi-scalar stable Lagrangian\, and give some applications of th is particular theory. Then\, in order to see which kind Black Hole solutio ns we can expect in Poincaré Gauge theories\, I will study Birkhoff's and no-hair theorems under physically relevant conditions. Finally\, I will s how an ultraviolet extension of Poincaré Gauge theories by introducing no n-local terms into the action\, which can ameliorate the singular behaviou r at large energies. I will present solutions of this theory at the linear level\, and prove that such solutions are ghost- and singularity-free\n LOCATION:https://researchseminars.org/talk/UTPhysics/4/ END:VEVENT END:VCALENDAR