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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

As the superiority of quantum two-way time transfer (Q-TWTT) has been provedconvincingly over fiber links, its implementation on free-space links becomesan urgent need for remote time transfer expanding to the transcontinentaldistance. In this paper, the first Q-TWTT experimental demonstration over ahybrid link of 2 km-long turbulent free space and 7 km-long field fiber isreported. Despite the significant loss of more than 25 dB and atmosphericturbulence, reliable time transfer performance lasting for overnights has beenrealized with time stability in terms of time deviation far below 1 picosecond.This achievement shows the good feasibility of quantum-enhanced time transferin the space-ground integrated optical links and nicely certifies thecapability of Q-TWTT in comparing and synchronizing the state-of-the-art spacemicrowave atomic clocks.

Quantum two-way time transfer over a hybrid free-space and fiber link