Quantum Kinetic Theory from Holography

We derive quantum kinetic theory in strongly coupled media using holography.  It is known how we can derive quantum kinetic theory from
non-equilibrium correlation functions. All non-equilibrium Green's functions can be written as combinations of the spectral function (which carries information about density of states) and the statistical function (which carries information about how different energy levels are occupied or should be weighted) in a given state. We show how these can be obtained holographically from studying propagation of fields systematically in black hole backgrounds perturbed by hydrodynamic/non-hydrodynamic quasi-normal modes. As expected from field theory, we get an universal prescription. We then show how this reproduces non-equilibrium states in holographic non-Fermi liquids and are relevant for time-resolved ARPES. We further point out applications in understanding production, transport and freeze-out of hadrons in strongly coupled quark-gluon plasma at RHIC, particularly from the point of view of constructing better experimental observables for constructing the space-time expansion of the quark-gluon plasma.