SUDDEN CHANGE OF QUANTUM DISCORD UNDER SINGLE QUBIT NOISE
Lixing Jia, Bo Li, R. H. Yue, Heng Fan · International Journal of Quantum Information · 2013
We show that the sudden change of quantum correlation can occur even when only one part of the composite entangled state is exposed to a noisy environment. Our results are illustrated through the action of different noisy environments individually on a single qubit of quantum system. Composite noise on the whole of the quantum system is thus not the necessarily condition for the occurrence of sudden transition for quantum correlation.