Generic vanishing for Dolbeault cohomology of mixed Hodge modules on abelian varieties

Source abstract

We study generic vanishing for the Dolbeault cohomology of mixed Hodge modules, where the differentials in the Dolbeault complex are modified by a one-form. We prove that, on the Dolbeault moduli space of Higgs line bundles, the cohomology support loci of mixed Hodge modules agree with the images of the cohomology support loci of their underlying $\mathscr{D}$-modules on the de Rham moduli space under the map induced by the nonabelian Hodge correspondence. We further apply this result to study Fourier-Mukai transforms of mixed Hodge modules on abelian varieties. We show that the extended Fourier-Mukai transform for bounded complexes of mixed Hodge modules has cohomology sheaves that are flat over the twistor line of $λ$-connections. This also gives an extension of Fourier transform of mixed Hodge modules to a compactification of the de Rham moduli space.