Generating and protecting correlated quantum states under collective dephasing

Generating and protecting correlated quantum states under collective dephasing

Blog Article

We study the collective dephasing process of a system of non-interacting atomic qubits, immersed in a spatially uniform magnetic field of fluctuating intensity.The correlation properties of bipartite states are analysed based on a geometric representation of the state space.Particular boxes emphasis is put on the dephasing-assisted generation of states with a high correlation rank, which can be related to discord-type correlations and allow for direct applications in quantum information theory.

Finally we study the conditions that ensure the robustness of initial entanglement and Wooden Kit discuss the phenomenon of time-invariant entanglement.