Summary #1140

A new scheme for satellite-based quantum-secure time transfer
  • New satellite-based quantum information exchange protocol uses two-way quantum key distribution in free space to encrypt communications between devices.
  • With this protocol, any third-party attempt to capture even a single photon will change the quantum state, which can later be verified.
  • This protocol is demonstrated in the World’s first satellite equipped for quantum communications, the Micius, launched back in 2016.
  • It’s the first satellite based quantum information exchange using single photons, and the results are comparable to state-of-the-art systems that use lasers.
  • Next, the researchers plan to build a satellite-based global-scale quantum network to test the protocol and find practical applications for it.


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