ar X iv : q ua nt - p h / 02 02 02 9 v 2 1 6 A pr 2 00 2 Scaling of Entanglement close to a Quantum Phase Transitions
نویسنده
چکیده
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.
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