"I assume that's c^2, which is now imaginary. What's the interpretation of that?"
It is still a constant though it has an imaginary c+2(+indicates that more constants(n) are inside the constant, not that the constant is imaginary, rather that it is a scale of constants)which I like to relate to negative mass, which is not represented as negative2 but rather as E/-m since it is an ongoing process into negative mass, which is similar to the Gauge theory in that way that both are hypothetical. I don't see the reason that it needs to obey Maxwell's equations since the hypothetical particles which obey this quazitheory don't need to have electromagnetic potential. The rest of my original post is a way of saying that the negative mass going to a massless state and vice versa is inherently possible since negative mass and a massless state have to have a correlation.
To reason further;
The rest of my original post is a way of saying that the negative mass going to a massless state and vice versa is inherently possible since negative mass and a massless state have to have a correlation and that correlation doesn't need to provide a pair of particles, but a correlating set of formulae.
One minor proof would be the Casimir effect, which proves my original theory in a way.
"Casimir effect and propulsion
The Casimir effect has been linked to the possibility of faster-than-light travel because of the fact that the region inside a Casimir cavity has negative energy density. Zero energy density, by definition, is the energy density of normal "empty space." Since the energy density between the conductors of a Casimir cavity is less than normal, it must be negative. Regions of negative energy density are thought to be essential to a number of hypothetical faster-than-light propulsion schemes, including stable wormholes and the Alcubierre warp drive.
There is another interesting possibility for breaking the light-barrier by an extension of the Casimir effect. Light in normal empty space is "slowed" by interactions with the unseen waves or particles with which the quantum vacuum seethes. But within the energy-depleted region of a Casimir cavity, light should travel slightly faster because there are fewer obstacles. A few years ago, K. Scharnhorst of the Alexander von Humboldt University in Berlin published calculations5 showing that, under the right conditions, light can be induced to break the usual light-speed barrier. Under normal laboratory conditions this increase in speed is incredibly small, but future technology may afford ways of producing a much greater Casimir effect in which light can travel much faster. If so, it might be possible to surround a space vehicle with a "bubble" of highly energy-depleted vacuum, in which the spacecraft could travel at FTL velocities, carrying the bubble along with it.
References
Casimir, H. G. B. "On the attraction between two perfectly conducting plates." Proc. Con. Ned. Akad. van Wetensch B51 (7): 793-796 (1948).
Lamoreaux, S. K. "Demonstration of the Casimir force in the 0.6 to 6 mm range." Physical review Letters 78 (1): 5-8 (1997).
Schwinger, J. "Casimir light: The source." Proceedings of the National Academy of Science, 90: 2105-6 (1993).
Munday, J. N., Capasso, F. & Parsegian, V. A. Nature 457, 170–173 (2009).
Scharnhorst, K. Physics Letters B236: 354 (1990)."