A network of optical devices – mirrors, beamsplitters, and optical fibres – weave laser light into an optical quantum processor.
Original Published Date: 
Monday, October 21, 2019

Full article issued by RMIT University and the ARC Centre of Excellence for Quantum Computation and Communication Technology (CQC2T).

Researchers at the ARC Centre of Excellence for Quantum Computation and Communication Technology at RMIT University have opened a new avenue to quantum computing with a breakthrough prototype: a large-scale quantum processor made entirely of light.

The international team of scientists from Australia, Japan and the United States has produced a quantum processor made of laser light that has built-in scalability, allowing the number of quantum components to scale to extreme numbers.

Lead researcher, Dr Nicolas Menicucci, an ARC Discovery Early Career Researcher Award (DECRA) recipient now based at RMIT University, says that while today’s quantum processors are impressive, it isn’t clear if the current designs can be scaled up to extremely large sizes.  

Although the levels of squeezing—a measure of quality—are currently too low for solving practical problems, the design is compatible with approaches to achieve state-of-the-art squeezing levels. The team says their achievement opens up new possibilities for quantum computing with light. 

Photo credit: 

A network of optical devicesmirrors, beamsplitters, and optical fibresweave laser light into an optical quantum processor. Credit: CQC2T.