Monge-Ampère functionals for the curvature tensor of a holomorphic vector bundle

Abstract

Let $E$ be a holomorphic vector bundle on a projective manifold $X$ such that $\det E$ is ample. We introduce three functionals ${\Phi }_P$ related to Griffiths, Nakano and dual Nakano positivity respectively. They can be used to define new concepts of volume for the vector bundle $E$, by means of generalized Monge-Ampère integrals of ${\Phi }_P({\Theta }_{E,h})$, where ${\Theta }_{E,h}$ is the Chern curvature tensor of $(E,h)$. These volumes are shown to satisfy optimal Chern class inequalities. We also prove that the functionals ${\Phi }_P$ give rise in a natural way to elliptic differential systems of Hermitian-Yang-Mills type for the curvature, in such a way that the related $P$-positivity threshold of $E\otimes (\det E{)}^t$, where $t>-1/\mathrm{rank}E$, can possibly be investigated by studying the infimum of exponents $t$ for which the Yang-Mills differential system has a solution.