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

High-dimensional entangled states are promising candidates for increasing thesecurity and encoding capacity of quantum systems. While it is possible towitness and set bounds for the entanglement, precisely quantifying thedimensionality and purity in a fast and accurate manner remains an openchallenge. Here, we report an approach that simultaneously returns thedimensionality and purity of high-dimensional entangled states by simpleprojective measurements. We show that the outcome of a conditional measurementreturns a visibility that scales monotonically with entanglement dimensionalityand purity, allowing for quantitative measurements for general photonic quantumsystems. We illustrate our method using transverse spatial modes of photonsthat carry orbital angular momentum and verify high-dimensional entanglementover a wide range of state purities. Our approach advances the high-dimensionaltool box for characterising quantum states by providing a simple and directdimensionality and purity measure, even for mixed entangled states.

A dimensionality and purity measure for high-dimensional entangled states