Invariant Quantum Discord in Qubit-Qutrit Systems under Local Dephasing
Quantum Physics
2013-04-02 v1
Abstract
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.
Keywords
Cite
@article{arxiv.1208.5705,
title = {Invariant Quantum Discord in Qubit-Qutrit Systems under Local Dephasing},
author = {G. Karpat and Z. Gedik},
journal= {arXiv preprint arXiv:1208.5705},
year = {2013}
}
Comments
6 pages, 1 figure. Submitted to the proceedings of CEWQO-2012