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.
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.