"The JASON report considers relatively low EM energy fluxes, when compared with those generated by the physical mechanisms described in the inventor's aforementioned published paper (on the order of 1033 W/m2, and beyond). This exceptionally high EM power intensity induces spontaneous particle pair production (avalanche) out of the vacuum of free space, thereby, ensuring complete polarization of the local Vacuum energy state, thus resulting in modification of the local spacetime energy density. It is because of this fact, that the JASON report's conclusions must be revisited, are incorrect, and are directly in conflict with the current invention."
In my Reddit post, I get into more detail, in regards to the relationship between JASON and the US Navy. (JASON was a program started by DARPA, who created the Internet.)
That document says very clearly the technology is not feasible.