Mixed state sensitivity of several quantum information benchmarks
Quantum Physics
2007-05-23 v2
Abstract
We investigate an imbalance between the sensitivity of the common state measures--fidelity, trace distance, concurrence, tangle, von Neumann entropy and linear entropy--when acted on by a depolarizing channel. Further, in this context we explore two classes of two-qubit entangled mixed states. Specifically, we illustrate a sensitivity imbalance between three of these measures for depolarized (i.e., Werner-state like) nonmaximally entangled and maximally entangled mixed states, noting that the size of the imbalance depends on the state's tangle and linear entropy.
Cite
@article{arxiv.quant-ph/0407172,
title = {Mixed state sensitivity of several quantum information benchmarks},
author = {Nicholas A. Peters and Tzu-Chieh Wei and Paul G. Kwiat},
journal= {arXiv preprint arXiv:quant-ph/0407172},
year = {2007}
}
Comments
6 pages, 3 figures; corrected typos and expression (17)