Lattice QCD sounds interesting. I must confess to being disappointed after checking out Wikipedia to find that it's *not* the chromodynamics of protons and neutrons packed into a crystal lattice--though admittedly that doesn't sound very likely even to my ears. Only situation I can think of involving that would be inside a very large nucleus. Or neutronium.

Out of curiosity, what sort of calculations are they doing? Is it very complex math, or do they just need to simulate a large number of particles interacting all at once?