MiHsC (the first model that explains inertia) works using horizons, which are boundaries in space between areas that can get information to us at light speed, and areas which can't, like black hole event horizons. If you accelerate away from a region of space fast enough it means that information there suddenly cannot get to you and an information horizon forms cutting it off. In MiHsC this horizon damps the zero point field on the side opposite to your acceleration vector, so you roll down a gradient in the zpf towards the horizon, and this models inertial mass.
... by Mike McCulloch (one theory to explain EM drive) http://physicsfromtheedge.blogspot.com/2016/06/the-pull-of-distant-horizon.html
