Things can always be done faster, but can anything beat light? Computing with light instead of electricity is seen as a breakthrough to boost computer speeds. Transistors, the building blocks of data circuits, are required to switch electrical signals into light in order to transmit the information via a fiber-optic cable. Optical computing could potentially save the time and energy used for such conversion. In addition to the high-speed transmission, outstanding low-noise properties of photons make them ideal for exploring quantum mechanics. At the heart of such compelling applications is to secure a stable light source, especially in a quantum state.
Source:
https://phys.org/news/2020-07-quantum-exciton-magnetic-van-der.html