У оквиру семинара Групе за гравитацију, честице и поља, у петак, 13. новембра 2026. године у 11 часова у сали 360 Института за физику у Београду, др Марија Димитријевић Ћирић (Физички факултет, Универзитет у Београду) одржаће предавање:
From gauge theory to gravity and back: double copy and noncommutative gravity
САЖЕТАК:
The idea of double copy first appeared in the Kawai-Lewellen-Tye (KLT) relations between closed and open string amplitudes and it was made precise by the Bern-Carrasco-Johansson (BCJ) colour-kinematics duality. The double copy formalism allows graviton scattering amplitudes to be computed from much simpler Yang-Mills amplitudes. Over the past decade the double copy idea has been extended beyond amplitudes: to exact classical solutions, to off-shell actions, and to the homotopy algebraic description of field theories. In the first part of the seminar we will briefly review these developments and discuss in more details the Kerr-Schild single copy and the classical off-shell double copy of Diaz-Jaramillo, Hohm and Plefka. In the second part of the seminar, we will construct the braided noncommutative Yang-Mills theory and perform its classical off-shell double copy. The resulting cubic vertex reproduces, at second order in the noncommutativity parameter, the three-graviton vertex of braided Einstein-Cartan-Palatini gravity. We will conclude with open questions, including the homotopy double copy of braided gauge theories and the role of torsion