Quantum discord near Anderson metal–insulator transition with correlated disorder

• Quantum discord exhibits a sudden transition around the boundary between the localized state and extended ones.
• Quantum discord does not depend on the system size LL in the region of extended states.
• The results indicate that there exists a smooth crossover in the region 1≲α≲21≲α≲2 except for the critical point 2.

Localization transitions in the one-dimensional Anderson model with long range correlated disorder are studied by means of quantum discord. The results show that the quantum discord exhibits a sudden transition around the boundary between the localized state and extended ones, and does not depend on the system size LL in the region of extended states. This feature can depict an identical phase diagraph as well as the traditional method. As an another example, we also consider this quantum correlation in the random dimer model. It is then shown that the quantum discord can be a good quantity to detect the localization transition in these one-dimensional systems with correlated disorder.