Entanglement entropy dynamics of Heisenberg chains

@article{DeChiara2005EntanglementED,
  title={Entanglement entropy dynamics of Heisenberg chains},
  author={Gabriele De Chiara and Simone Montangero and Pasquale Calabrese and Rosario Fazio},
  journal={Journal of Statistical Mechanics: Theory and Experiment},
  year={2005},
  volume={2006},
  pages={P03001 - P03001}
}
By means of the time dependent density matrix renormalization group algorithm we study the zero-temperature dynamics of the Von Neumann entropy of a block of spins in a Heisenberg chain after a sudden quench in the anisotropy parameter. In the absence of any disorder the block entropy increases linearly with time and then saturates. We analyse the velocity of propagation of the entanglement as a function of the initial and final anisotropies and compare our results, wherever possible, with… 

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