A. Osterloh, L. Amico, G. Falci, R. Fazio
Published 2002-02-05, updated 2002-04-16Version 2
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.
Comments: 4 pages, 4 figures, revtex. Stylistic changes and format modified
Journal: Nature 416, 608 (2002)
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