  We present real-time inchworm quantum Monte Carlo results for single-site
dynamical mean field theory on an infinite coordination number Bethe lattice.
Our numerically exact results are obtained on the L-shaped Keldysh contour and,
being evaluated in real-time, avoid the analytic continuation issues typically
encountered in Monte Carlo calculations. Our results show that inchworm Monte
Carlo methods have now reached a state where they can be used as dynamical mean
field impurity solvers and the dynamical sign problem can be overcome. As
non-equilibrium problems can be simulated at the same cost, we envisage the
main use of these methods as dynamical mean field solvers for time-dependent
problems far from equilibrium.
