Scaling, Entanglement, and Quantum Phase Transitions
作者:
A. Osterloh,
L. Amico,
G. Falci,
R. Fazio,
期刊:
AIP Conference Proceedings
(AIP Available online 1903)
卷期:
Volume 678,
issue 1
页码: 323-332
ISSN:0094-243X
年代: 1903
DOI:10.1063/1.1612400
出版商: AIP
数据来源: AIP
摘要:
We study the entanglement near a quantum phase transition in a class of exactly solvable one‐dimensional quantum magnets, the anisotropic XY models. The critical behaviour (scaling) is reflected by the derivatives of the bipartite entanglent, quantified by the concurrence. However, we found a profound difference between classical correlation and non‐local quantum correlation: The range of the concurrence is found to behave in a non‐universal way, being extremely short‐ranged for the Ising model. This range tends to infinity towards the isotropic XY model. © 2003 American Institute of Physics
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