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

We obtain a simplified and obvious expression of "concurrence" in Wootters'measure of entanglement of a pair of qubits having no more than two non-zeroeigenvalues in terms of concurrences of eigenstates and their simplecombinations. It not only simplifies the calculation of Wootters' measure ofentanglement, but also reveals some its general and important features. Ourconclusions are helpful to understand and use quantum entanglement further.Comment: 5 page

A Simplified and Obvious Expression of Concurrence in Wootters' Measure of Entanglement of a Pair of Qubits