Invariant quantum discord in qubit-qutrit systems under local dephasing
Karpat, Göktuğ and Gedik, Zafer (2013) Invariant quantum discord in qubit-qutrit systems under local dephasing. Physica Scripta, T153 . ISSN 0031-8949 (Print) 1402-4896 (Online)
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Official URL: http://dx.doi.org/10.1088/0031-8949/2013/T153/014036
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, the partial coherence left in the system enables quantum discord to remain invariant throughout the time evolution.
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