Area laws for the entanglement entropy - a review

  title={Area laws for the entanglement entropy - a review},
  author={Jens Eisert and Marcus Cramer and Martin Bodo Plenio},
  journal={Reviews of Modern Physics},
Physical interactions in quantum many-body systems are typically local: Individual constituents interact mainly with their few nearest neighbors. This locality of interactions is inherited by a decay of correlation functions, but also reflected by scaling laws of a quite profound quantity: The entanglement entropy of ground states. This entropy of the reduced state of a subregion often merely grows like the boundary area of the subregion, and not like its volume, in sharp contrast with an… 

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