Scaling and universality of multipartite entanglement at criticality

Details Scaling and universality of multipartite entanglement at criticality Scaling and universality of multipartite entanglement at criticality

2007-08-26

arxiv.org/abs/0708.3391v3

Physics

Quantum Physics

5 pages, 3 figures. V2: expanded references, corrected minor typos. V3: corrected typos in title and reference list

Scientific paper

Using the geometric entanglement measure, we study the scaling of multipartite entanglement in several 1D models at criticality, specifically the linear harmonic chain and the XY spin chain encompassing both the Ising and XX critical models. Our results provide convincing evidence that 1D models at criticality exhibit a universal logarithmic scaling behavior ~(c/12)log l in the multipartite entanglement per region for a partition of the system into regions of size l, where c is the central charge of the corresponding universality class in conformal field theory.

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