Quantum discord and local demons
Quantum Physics
2010-06-10 v2
Abstract
Quantum discord was proposed as a measure of the "quantumness" of correlations. There are at least three different discord-like quantities, two of which determine the difference between the efficiencies of a Szilard's engine under different sets of restrictions. The three discord measures vanish simulataneosly. We introduce an easy way to test for zero discord, relate it to the Cerf-Adami conditional entropy and show that there is no relation between the discord and the local disitnguishability.
Keywords
Cite
@article{arxiv.1002.4913,
title = {Quantum discord and local demons},
author = {Aharon Brodutch and Daniel R. Terno},
journal= {arXiv preprint arXiv:1002.4913},
year = {2010}
}
Comments
7 pages, RevTeX. Some minor changes after comments from colleagues, some references added. Similar to published version