Evolution of entanglement entropy in orbifold CFTs

  title={Evolution of entanglement entropy in orbifold CFTs},
  author={Pawel Caputa and Yuya Kusuki and Tadashi Takayanagi and Kento Watanabe},
  journal={Journal of Physics A: Mathematical and Theoretical},
In this work we study the time evolution of the Rényi entanglement entropy for locally excited states created by twist operators in the cyclic orbifold (T2)n/Zn and the symmetric orbifold (T2)n/Sn. We find that when the square of its compactification radius is rational, the second Rényi entropy approaches a universal constant equal to the logarithm of the quantum dimension of the twist operator. On the other hand, in the non-rational case, we find a new scaling law for the Rényi entropies given… 

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