Robustness of quantum discord to sudden death in NMR
Quantum Physics
2011-06-02 v1
Abstract
We investigate the dynamics of entanglement and quantum discord of two qubits in liquid state homonuclear NMR. Applying a phenomenological description for NMR under relaxation process, and taking a group of typical parameters of NMR, we show that when a zero initial state experiences a relaxation process, its entanglement disappears completely after a sequence of so-called sudden deaths and revivals, while the quantum discord retains remarkable values after a sequence of oscillations. That is to say, the quantum discord is more robust than entanglement.
Cite
@article{arxiv.1106.0125,
title = {Robustness of quantum discord to sudden death in NMR},
author = {Jianwei Xu and Qihui Chen},
journal= {arXiv preprint arXiv:1106.0125},
year = {2011}
}
Comments
8 pages, 10 figures, single-column