The first large quantum processor made of laser light

An international team of researchers from Australia, Japan and the US announced that it has opened a new path in the field of quantum computing, creating the first large-scale quantum processor, made exclusively of laser light.

After ten years of efforts, a processor has been developed, all of which are made of light. The new processor (called the “cluster state”) consists of a set of quantum “interlocking” components that allow quantum computations to be performed.

The researchers, led by Dr Nicolas Menikoutsi of the Center for Quantum Computing and Communication Technology at RMIT University in Melbourne, published the paper in the journal Science, according to AMPE.

Quantum computers promise faster solutions to difficult problems, but to date they rely on quantum processors that are small and prone to errors. The new quantum design is an alternative, as it uses light to operate on a large scale, as is needed for quantum computers to eventually outperform classical computers.

“Although today’s quantum processors are impressive, it is not clear whether their current design allows them to be scaled to very large sizes. Our approach from the outset incorporates precisely this capability, as our processor is made of light, “Menikuchi said.

In the new processor, specially designed crystals convert ordinary laser light into a type of quantum light, the “compressed” light, which eventually functions as a processor with the help of a network of mirrors, beam separators and fiber optics.