Researchers have made a new miniaturized light detector to measure features of quantum light in more detail than ever before. The device, made from two silicon chips working together, was used to measure the unique properties of “squeezed” quantum light at record-high speeds.
Harnessing the unique properties of quantum physics promises novel routes to outperform the current state-of-the-art in computing, communication, and measurement. Silicon photonics – where light is used as the carrier of information in silicon micro-chips – is an exciting avenue towards these next-generation technologies.
Squeezed quantum light is a very useful effect. It can be used in quantum communications and quantum computers and has already been used by the LIGO and Virgo gravitational wave observatories to improve their sensitivity, helping to detect exotic astronomical events such as black hole mergers. So, improving the ways we can measure it can have a big impact.