Quantum key distribution network accurately measures ground vibration - Phys.org

A team of researchers affiliated with several institutions in China has found that quantum key distribution (QKD) networks can be used to accurately measure ground vibration. In their paper published in the journal Physical Review Letters, the group describes…

Schematic of experimental setup. In Alices (Bobs) lab, a seed laser is locked to an ultra-low-expansion (ULE) glass cavity to achieve a subhertz linewidth by using the Pound-Drever-Hall (PDH) [41, 42… [+4351 chars]

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