Positive and negative feedback by AGN jets in high-redshift galaxies
  Simulations of feedback by jets from active galactic nuclei (AGN) in the past
mostly focused on the interaction at large scales as the circumgalactic medium
or intra-cluster medium for clusters of galaxies. Only in recent years,
simulations have included the interaction of jets with a highly inhomogeneous
medium as required by a multi-phase interstellar medium (ISM). At the same
time, feedback by AGN has become a common component for cosmological
simulations of galaxy evolution to form massive galaxies compatible with
observations. I will present some of our recent results and will put them into
further context of other feedback simulations and how the opposing effects of
positive and negative feedback by jets might be understood in terms of
different properties of the ISM.
