Thanks for the sharp question. You hit the core challenge. I am targeting a sensitivity of 10^{-18} seconds, which is within the range of modern Sr-87 optical lattice clocks (current stability \approx 10^{-19}). While the effect of information density (\Delta S_{info}) is expected to be extremely subtle compared to mass (G), the differential measurement (Entangled vs. Non-entangled) allows me to filter out common-mode noise. Even if I get a null result, establishing an upper bound on the coupling constant \alpha would be a significant contribution. I'm putting my bet on the high complexity of the GHZ state.

Valid point. I'm reaching out to academia too. I posted here because my theory treats spacetime as a computational substrate, and HN has the best mix of physicists and engineers to critique that specific angle.

Spot on. An Event Horizon indeed represents the theoretical limit of information density (the Bekenstein bound).

Since I can't create one in the lab, I'm betting on GHZ states to generate a steep enough local information gradient to yield a measurable effect. It's a scale-down, but unlike a black hole, we can test it today.