2002/02/28 by A. Osterloh, L. Amico, G. Falci +1 · 5 citations
Physics and Astronomy · #quant-ph #cond-mat.str-el
paper · pdf · doi:10.1038/416608a
published as Nature 416, 608 (2002) · 4 pages, 4 figures, revtex. Stylistic changes and format modified
arxiv created 2002/04/16 · arxiv updated 2009/11/30
In this Letter we discuss the entanglement near a quantum phase transition by analyzing the properties of the concurrence for a class of exactly solvable models in one dimension. We find that entanglement can be classified in the framework of scaling theory. Further, we reveal a profound difference between classical correlations and the non-local quantum correlation, entanglement: the correlation length diverges at the phase transition, whereas entanglement in general remains short ranged.