  Recently, there has been much interest in holographic computations of
two-point non-equilibrium Green functions from AdS-Vaidya backgrounds. In the
strongly coupled quantum field theory on the boundary, the dual interpretation
of the background is an equilibration process called a holographic quench. The
two dimensional AdS-Vaidya spacetime is a special case, dual to conformal
quantum mechanics. We study how the quench is incorporated into a Hamiltonian
$H + \theta(t) \Delta H$ and into correlation functions. With the help of
recent work on correlation functions in conformal quantum mechanics, we first
rederive the known two point functions, and then compute non-equilibrium 3- and
4-point functions. We also compute the 3-point function Witten diagram in the
two-dimensional AdS-Vaidya background, and find agreement with the conformal
quantum mechanics result.
