Breaking News
What could possibly go wrong? Scientists use AI to design new viruses
Dual-motor suitcase drive underpins 3,000-hp hypercar
Interview 2031 - The Ceuta Psyop Was A Bust! (NWNW #639)
Pakistan, Saudi Arabia, Turkey to sign defence pact to set up 'Islamic Nato' alliance
Top Tech News
Shade-Resistant Solar Cells Retain 97% Efficiency After 2,000 Hours of Testing
20 Ancient Engineering SECRETS
Stonehenge Was Reanalyzed by AI -- And the Findings Are Hard to Explain
After Years Of Delays, Aptera Is Finally Preparing To Build Customer Cars
'When you kill it, it doesn't die': the jellyfish that has cracked the secret of immorta
Archer Aviation debuts Halo autonomous VTOL, Thunder's commercial twin
US Telecoms Slide On Starlink Mobile Threat; Bernstein Sees It As A "Jab, But No Knockout Yet**
Betavolt unveils revolutionary coin-size battery with nickel-63 nuclear isotope...
China claims it has built a 'nuclear drone' that can stay airborne forever
Canada just solved two giant infrastructure problems at exactly the same time.
Global Quantum Communication Network has Been Proven Feasible With 20,000 km...
The first exchange of a few photons per pulse has been performed between two different satellites 20,000 kilometers apart. This was between the Russian GLONASS constellation and the Space Geodesy Centre of the Italian Space Agency.
The longest channel length previously demonstrated was around 7,000 km, in an experiment using a Medium-Earth-Orbit (MEO) satellite that we reported in 2016.
Arxiv – Towards quantum communication from global navigation satellite system (8 pages).
Satellite-based quantum communication (QC) is an invaluable resource for the realization of a quantum network at the global scale. In this regard, the use of satellites well beyond the low Earth orbit gives the advantage of long communication time with a ground station. However, high-orbit satellites pose a great technological challenge due to the high diffraction losses of the optical channel, and the experimental investigation of such quantum channels is still lacking. Here, we report on the first experimental exchange of single photons from a global navigation satellite system (GNSS) at a slant distance of 20 000 km, by exploiting the retroreflector array mounted on GLONASS satellites.