Flow of quantum correlations from a two-qubit system to its environment

G. H. Aguilar, O. Jiménez Farías, A. Valdés-Hernández, P. H. Souto Ribeiro, L. Davidovich, S. P. Walborn

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Resum

The open-system dynamics of entanglement plays an important role in the assessment of the robustness of quantum information processes and also in the investigation of the classical limit of quantum mechanics. Here we show that, subjacent to this dynamics, there is a subtle flow of quantum correlations. We use a recently proposed optical setup, which allows joint tomography of system and environment, to show that the decay of an initial bipartite entangled state leads to the buildup of multipartite entanglement and quantum discord, the latter exhibiting a nonanalytic behavior that signals the emergence of maximal genuine quantum entanglement. The origin of this analyticity is shown to be distinct from similar behavior previously found in bipartite systems. Monogamy relations within the context of open-system dynamics explain this phenomenon.

Idioma originalAnglès
Número d’article022339
RevistaPhysical Review A - Atomic, Molecular, and Optical Physics
Volum89
Número2
DOIs
Estat de la publicacióPublicada - 26 de febr. 2014
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