Systems which can emit a stream of single photons, referred to as quantum light sources, are critical hardware components for emerging technologies such as quantum computing, the quantum internet, and quantum communications.
![](https://scx1.b-cdn.net/csz/news/tmb/2020/devilinthede.jpg)
Source:
https://phys.org/news/2020-11-devil-defect-quantum-emissions-unravelled.html