https://www.sciencedaily.com/releases/2018/06/180604155451.htm > It takes intense, single-cycle pulses of photons -- flashes -- hitting the cooled alloy at terahertz speed -- trillions of cycles per second -- to switch on this hidden state of matter by modifying quantum interactions down at the atomic and subatomic levels. > And then it takes a second terahertz light to trigger an ultrafast camera to take images of the state of matter that, when fully understood and tuned, could one day have implications for faster, heat-free, quantum computing, information storage and communication.