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/

Zendy Open

Presents the pdf analysis as premium feature

PDF Analysis

Insights

Presents the summarisation as premium feature

Summarisation

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

The paper [Phys. Lett. A 373 (2009) 3610] by D.-C. Li analyzes thetransformation between two-qubit mixed states by local operations and classicalcommunication. We show that the proof of the main theorem, Theorem 2.6 in[Phys. Lett. A 373 (2009) 3610] is not complete. Therefore the generalizationof Nielsen's theorem to mixed states still remains an open problem.

Comment on "Entanglement transformation between two-qubit mixed states by LOCC" [Phys. Lett. A 373 (2009) 3610]