Coupled Kahler-Einstein and Hermitian-Yang-Mills equations

We introduce a new system of equations coupling Kahler-Einstein and Hermitian-Yang-Mills equations. We provide a moment map interpretation of these equations. We identify a Futaki type invariant as an obstruction to the existence of solutions to these equations. We also prove a Matsushima-Lichnerowicz type theorem. We prove a deformation result that produces nontrivial solutions of these equations under some conditions. We produce examples on some projective bundles using Calabi ansatz.(c) 2023 Elsevier Masson SAS. All rights reserved.