# Criticality, factorization, and long-range correlations in the anisotropic XY model

@article{Campbell2013CriticalityFA, title={Criticality, factorization, and long-range correlations in the anisotropic XY model}, author={Steve Campbell and Jonathan G. Richens and Nicola Lo Gullo and Thomas Busch}, journal={Physical Review A}, year={2013}, volume={88}, pages={062305} }

We study the long-range quantum correlations in the anisotropic XY-model. By first examining the thermodynamic limit we show that employing the quantum discord as a figure of merit allows one to capture the main features of the model at zero temperature. Further, by considering suitably large site separations we find that these correlations obey a simple scaling behavior for finite temperatures, allowing for efficient estimation of the critical point. We also address ground-state factorization…

## 43 Citations

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Abstract
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