Invariant quantum discord in qubit-qutrit systems under local dephasing
Karpat, Göktuğ and Gedik, Zafer (2012) Invariant quantum discord in qubit-qutrit systems under local dephasing. (Accepted/In Press)
We investigate the dynamics of quantum discord and entanglement for a class of mixed qubit-qutrit states assuming that only the qutrit is under the action of a dephasing channel. We demonstrate that even though the entanglement in the qubit-qutrit state disappears in a finite time interval, partial coherence left in the system enables quantum discord to remain invariant throughout the whole time evolution.
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