# Predominance of entanglement of formation over quantum discord under quantum channels

@article{Campbell2012PredominanceOE, title={Predominance of entanglement of formation over quantum discord under quantum channels}, author={Steve Campbell}, journal={Quantum Information Processing}, year={2012}, volume={12}, pages={2623-2636} }

We present a study of the behavior of two different figures of merit for quantum correlations, entanglement of formation and quantum discord, under quantum channels showing how the former can, counterintuitively, be more resilient to such environments spoiling effects. By exploiting strict conservation relations between the two measures and imposing necessary constraints on the initial conditions we are able to explicitly show this predominance is related to build-up of the system-environment…

## 8 Citations

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Some elegant direct-dynamical relations between geometric measures of Entanglement and Discord are reported by considering Bell-diagonal two-qubit initial states under local dynamics generated by the Phase Damping, Bit Flip, phase Flip, Bit Phase Flip, and Depolarizing channels.

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The evolution of classical correlations in the physical implementation reveals the finite-time relaxation to a pointer basis under nondissipative decoherence, which is characterized geometrically in full analogy with predictions based on entropic measures.

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