English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

In a recent article [Phys. Rev. A 86, 024302 (2012)], the authors havederived some hierarchy relations between geometric discord and entanglement(measured by negativity and its square). We point out that these results areincorrect and give analytic counterexamples. We also discuss briefly the reasonfor such violations.

Comment on "Witnessed entanglement and the geometric measure of quantum discord"