Google has teamed up with the people over at MinecraftEDU and together they have devised a way of implementing quantum mechanics into Minecraft. It essentially brings the basic principles of quantum physics into many of the popular modpacks of Minecraft, including Feed the Beast Unleashed, Hexxit and Tekkit.
What is qCraft
qCraft is not a simulation of quantum physics (this is v1 after all) but it does provide ‘analogies’ that attempt to show how quantum behaviors are different from everyday experience.
The quote above is taken directly from the qCraft website and is simply stating that the mod in its current state provides analogies of how quantum behaviors work rather than a realistic ‘simulation’ of quantum physics taking place.