The properties of quantum states of light are already leveraged by such highly sophisticated leading-edge technologies as those of the latest sensitivity upgrades to LIGO, the Laser Interferometer Gravitational-Wave Observatory, deployed to detect gravitational waves since September 2015, or the encryption keys used for satellite on-board security.
![](https://scx1.b-cdn.net/csz/news/tmb/2020/3-researchprod.jpg)
Source:
https://phys.org/news/2020-11-intense-quantum.html