One of the big news this year was the practical quantum computing, with very significant advances made on theoretical and technical frontiers. But one big stumbling block has remained to meld the delicate quantum landscape with the more familiar digital one. This new microprocessor design just might be the solution we need.

Researchers from the University of New South Wales (UNSW) have come up with a new kind of architecture that uses standard semiconductors common to modern processors to perform quantum calculations. This basically means that the power of quantum computing can be unlocked using the same kinds of technology that forms the foundation of desktop computers and smartphones.

*“We often think of landing on the Moon as humanity’s greatest technological marvel,*” says designer Andrew Dzurak, director of the Australian National Fabrication Facility at UNSW.

*“But creating a microprocessor chip with a billion operating devices integrated together to work like a symphony – that you can carry in your pocket – is an astounding technical achievement, and one that’s *revolutionized* modern life.”*

Whether or not you agree that such an achievement would rival space travel, the step is a giant leap for computing. *“With quantum computing, we are on the verge of another technological leap that could be as deep and transformative. But a complete engineering design to *realize* this on a single chip has been elusive,”* says Dzurak.

Quantum computing makes use of an odd quirk of reality particles that exist in a fog of possibility until they are connected to a system that defines their properties. This fog of possibility has mathematical characteristics that are very useful if you know how to make use of them. While traditional computing is binary, representing the Universe as one of two symbols such as 1s and 0s. Quantum computing allows a layer of complexity to be represented by that spectrum of probabilities.

The problem is that this quantum fog also called a qubit is very delicate. The whole act of ‘measuring’ isn’t a strict affair meaning the particle can coalesce into reality or collapse to use the jargon accidentally. Since hundreds, if not many hundreds of thousands of qubits are needed to make the whole thing worthwhile, there’s plenty of room for unwanted collapses. To make sure unstable qubits don’t introduce too many errors, they need to be arranged in such a way to make them more robust.

*“So we need to use error-correcting codes which employ multiple qubits to store a single piece of data,”* says Dzurak. *“Our chip blueprint incorporates a new type of error-correcting code designed specifically for spin qubits, and involves a sophisticated protocol of operations across the millions of qubits.”*

This technology is the first attempt to put all of the conventional silicon circuitry needed to control and read the millions of qubits needed for quantum computing onto one chip. In simple words, conventional silicon transistors are used to control a flat grid of qubits in much the same way logic gates manages bits inside your desktop’s processors.

*“By selecting electrodes above a qubit, we can control a qubit’s spin, which stores the quantum binary code of a 0 or 1,”* explains lead author of the study, Menno Veldhorst, who conducted the research while at UNSW. *“And by selecting electrodes between the qubits, two-qubit logic interactions, or calculations, can be performed between qubits.”*

We are still some way off combining these advances into solid pieces of technology. Even once we have the first machines capable of modeling molecules in super high detail, or crunching the stats on climate change on an unprecedented scale we will need coders who know how to make use of qubits.

Microsoft has its eye on this technology recently releasing a free preview of its new quantum development kit for tomorrow’s programmers keen for a head start. It is happening, one by one and the technology hurdles are falling.