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

Long-distance quantum communication requires entanglement between distantquantum memories. For this purpose, photon transmission is necessary to connectthe distant memories. Here, for the first time, we develop a two-step frequencyconversion process (from a visible wavelength to a telecommunication wavelengthand back) involving the use of independent two-frequency conversion media wherethe target quantum memories are nitrogen-vacancy centers in diamonds (with anemission/absorption wavelength of 637.2 nm), and experimentally characterizethe performance of this process acting on light from an attenuated CW laser. Atotal conversion efficiency of approximately 7% is achieved. The noisegenerated in the frequency conversion processes is measured, and thesignal-to-noise ratio is estimated for a single photon signal emitted by anitrogen-vacancy (NV) center. The developed frequency conversion system hasfuture applications via transmission through a long optical fiber channel at atelecommunication wavelength for a quantum repeater network.

Two-step frequency conversion for connecting distant quantum memories by transmission through an optical fiber