Griffith University researchers are building the next wave of supercomputers.

Work published in Light: Science and Applications shows a new technique for a quick and reliable characterisation of integrated quantum chips that encode information using light instead of electrical current.

In collaboration with ANU, RMIT and UTS in Australia and ITMO University in Russia, the researchers demonstrate a new method for measuring and certifying the quality of quantum devices.

“Such devices will be key for the realisation of an ultra-powerful computer in the near future and are researched by industry leaders like IBM, Google and Microsoft,” said Griffith University researcher Associate Professor Mirko Lobino.

“Having a technique to certify the quality of such devices is crucial for the development of this technology on a large scale, and this is what we have done in our paper.

“Since future quantum computers will consist of thousands, if not more, devices assembled together, each part needs to be characterised quickly and with a high degree of precision, in order for the whole machine to work property. This is what we demonstrated in this work.”

The article’s lead author, Dr. Francesco Lenzini, said that the development of future quantum technologies would involve an expansion in scale and complexity of photonic devices for applications ranging from secure communication and enhanced sensing to computer science.