In an optical atomic clock, atoms are irradiated with laser light. If the laser has exactly the right frequency, the atoms change their quantum mechanical state. All external influences on the atoms ...

[Simon] built an elegant, stripped-back word clock of his own, with a laser cutter helping to get the job done. The core of the build is an Arduino Nano, hooked up to a string of 22 WS2812B LEDs ...

Developing and working with advanced quantum systems, atomic clocks and sensors require ... The researchers have developed a match-box-sized 780 nm laser device that comes with a chip.