Entanglement crossover close to a quantum critical point

Details Entanglement crossover close to a quantum critical point Entanglement crossover close to a quantum critical point

2005-11-18

arxiv.org/abs/cond-mat/0511466v3

Europhys.Lett. 77 (2007) 17001

Physics

Condensed Matter

Statistical Mechanics

12 pages; 5 figures (eps). References added; to be published in Europhysics Letters

Scientific paper

We discuss the thermal entanglement close to a quantum phase transition by analyzing the concurrence for one dimensional models in the quantum Ising universality class. We demonstrate that the entanglement sensitivity to thermal and to quantum fluctuations obeys universal $T\neq 0$--scaling behaviour. We show that the entanglement, together with its criticality, exhibits a peculiar universal crossover behaviour.

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