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 Plus

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

Zendy Tools

Zendy Open

K. He, J. Hou, and M. Li have recently given a sufficient and necessarycondition for unitary equivalence of quantum states. This condition is based onthe von Neumann entropy. In this note we first give a short proof of theirresult, and then we improve it.

The von Neumann entropy and unitary equivalence of quantum states