Work in progress with Ken Shoulders who worked with Hal Puthoff I think at NSA and later at Bill Church's Jupiter Technologies and in Austin.

http://qedcorp.com/destiny/ExoticVacuumObjects.pdf

Some think that Ken's "charge clusters" that I rename EVO's are merely charged mercury droplets. Ken says he can disprove that. What do I know? I am merely a simple-minded theorist. In any case I make a model of what Ken may be seeing.

One curious counterintuitive feature

Einstein's GR in weak field limit is Newton's gravity with a correction term

Grad^2(Gravity Potential) ~ G(mass density)(1 + 3w)

For exotic vacuum, Type 1a supernovae + CHANDRA et-al show
w ~ -1

The rule of thumb is G(mass density)(1 + 3w) is replaced by c^2/\zpf when w = -1. /\zpf can have either sign depending on intensity of local vacuum coherence field PSI.

Consider a thin shell of N electrons at radius r. The repulsive Coulomb self-energy is

~ (Ne)^2/r

Imagine a homogeneous sphere of uniform /\zpf field up to radius r as the inner core of the thin shell of N electrons.

The gravity potential self energy is then of the form (c^2/\zpf)^2r^6/G*r
where G* >> G on a short scale.

The total self-potential energy is then of the form

U = a(Ne)^2/r + b(c^2/\zpf)^2r^5/G* > 0

Note that both energy terms must be positive to have a possibility of metastability of the charge cluster. This BTW applies to a single spatially extended electron as in J.P. Vigier's "tight atomic states" theory for "cold fusion" or the "sub-atomic bomb."
http://english.pravda.ru/science/19/94/377/12778_weapons.html

The positive Coulomb repulsive barrier self-energy decreases with increasing radius of the thin shell. In contrast the positive exotic vacuum core zero point energy induced strong short-range effective gravity potential self-energy increases with increasing radius of the thin shell of electric charge. Together they form a potential well of oppositely directed force gradients allowing for the possibility of metastable equilibrium in this toy static spherically symmetric model where

Total Force on Thin Shell of Electric Charge

= -GradU = +a(Ne)^2/r^2 - 5b(c^2/\zpf)^2r^4/G*

With the metastable equilibrium point of the EVO charge cluster at the critical point:

GradU = 0

Of course in real EVOs this toy model is too simple.

/\zpf = (hG*/c^3)^-1[(hG*/c^3)^3/2|PSI|^2 - 1]

and PSI obeys a nonlinear dynamical Landau-Ginzburg type nonlinear nonunitary local partial differential equation with the Mexican Sombrero potential coupled to Einstein's exotic vacuum field equation

Guv + /\zpfguv = 0

And we have the complex dynamical behavior you see in Ken Shoulders' photographs in

http://qedcorp.com/destiny/ExoticVacuumObjects.pdf