China Quantum Communiations Technology: Cryptography, Radar, Satellite, Teleportation, Network

[JSCh]

Chinese scientists have developed a high-speed quantum key distribution (QKD) system to generate secret keys at a rate exceeding 110 Mb/s over a 10 km standard optical fiber, setting a new world record in the field. The findings were published Tue in the journal Nature Photonics.

https://twitter.com/x/status/1635927256169353216

High-rate quantum key distribution exceeding 110 Mb s–1 - Nature Photonics

A quantum key distribution with a key rate of 115.8 Mb s–1 is demonstrated over 10 km standard optical fibre. To this end, a high-speed and stable system, an integrated transmitter for low error modulation and multipixel superconducting nanowire single-photon detectors are developed.

www.nature.com

 

[JSCh]

Chinese scientists have set a world record by achieving twin-field quantum key distribution (QKD) through a 1,002-kilometer optical fiber, marking a critical step toward a future large-scale quantum network, according to a study published in the journal Physical Review Letters.

https://twitter.com/x/status/1663576006496485379

Experimental Twin-Field Quantum Key Distribution over 1000 km Fiber Distance

Quantum key distribution (QKD) aims to generate secure private keys shared by two remote parties. With its security being protected by principles of quantum mechanics, some technology challenges remain towards practical application of QKD. The major one is the distance limit, which is caused by...

journals.aps.org

 

[JSCh]

Three recent PRLs demontrate how to considerably ease the requirements for implementing quantum cryptography protocols over large distances. Letters: https://go.aps.org/3qNo9Ql https://go.aps.org/3CFRVcK https://go.aps.org/3Xj3dNs Viewpoint:

Long-Range Quantum Cryptography Gets Simpler

A series of demonstrations considerably ease the requirements for implementing quantum cryptography protocols over large distances.

physics.aps.org

https://twitter.com/x/status/1671246291282673664