"Magic" is the degree to which a state cannot be approximated by Clifford gates. We study mana, measure of magic, in ground $\mathbb Z_3$ Potts model, and argue that it broadly useful diagnostic for many-body physics. In particular we find $q = 3$ has large mana at model's critical point, this resides system's correlations. explain form simple tensor-counting calculation based on MERA represent...

BY THE year A.D. 1213 Christianity was victorious across Europe; only a few isolated pockets of paganism in remote districts of Sweden, Finland, and Moslem Spain held out against what must have seemed to be the inevitable influence of the Church. Nordic expansion was in eclipse. The age of the Vikings was at an end. The marauders who had loosed such fury on the continent to the south, had, in t...