Quote Originally Posted by Seppl View Post
In this case, it comes from whatever mechanism you used to "hold" the one quark and prevent it from falling into the hole.
That mechanism is the event horizon, so indeed the black hole could do the work for us. I cannot make direct calculations for this scenario, but I see no reason for it to be impossible. After all, it works perfectly well with virtual particles, which I would think are more difficult to tear away from each other. The probability of such a situation is most likely stupidly small in comparison to a clean fly-by or the whole meson falling into the black hole, but I do believe it to be non-zero. Depending on the actual value it might or might not be a viable energy extraction method.