Würzburg Seminar on Quantum Field Theory and Gravity

I will discuss macroscopic violations of cosmic censorship occurring in holographic models in which the ground state is described by a good singularity on the gravity side. These include supersymmetric truncations of string/M-theory. At the boundary, our solutions describe a boost-invariant fluid in which the temperature decreases with time. On the gravity side, the solutions describe black-brane spacetimes with a receding horizon on which curvature invariants grow without bound. We will see that no fine-tuned initial conditions are involved. At late times, the boundary dynamics is well described by hydrodynamics despite the failure of General Relativity in the bulk. I will finally comment on how quantum gravity effects in the bulk, or equivalently 1/N effects at the boundary, may modify the approach to the singularity.