A team at the Industrial Technology Research Institute (ITRI) has found a way to use a microwave integrated circuit (IC) and Taiwan Semiconductor Manufacturing Cos (TSMC) 28-nanometer technology to develop a low-temperature-control IC module, which can potentially reduce the size of a quantum computer by 40 percent, the institute said on Wednesday.

The National Science and Technology Council announced some of the progress it has made with Academia Sinica and the Ministry of Economic Affairs since 2021 in jointly developing quantum technologies.

The more quantum bits (qubits) a quantum computer possesses, the more information it can carry and the better it can work.

Sheu Shyh-shyuan (), a division director at the ITRIs Institute of Electro-Optics and the head of a project on the key hardware of quantum computer subsystems, said that a quantum computer is equipped with a fridge, other devices and a crowd of cables for connections, which in combination can easily take up a whole room.

One qubit requires two to three cables, so if a 100-million-qubit system is to be realized, that would mean 300 million cables, with the size of the control device and the system for cooling scaled up accordingly.

As a result, power consumption would surge considerably, Hsu said.

It is for this reason that minimization is a trend in quantum computing, he said.

He said that his team utilized microwave IC design and TSMCs 28-nanometer process technology, which are national strengths, to develop low-temperature (minus-269C) control chips and modules to make control devices smaller and place them in a low-temperature fridge.

The design could reduce the size of the system by about 40 percent, highlighting the potential for it to be commercialized, Hsu said.

The minimization of the module can also shorten the route needed for quantum signal transmission and reduce the interruption of noise, Hsu added.

The module also cuts power consumption by more than 50 percent compared with results published by major international developers, making it an advantage for developing multiple-qubit superconducting quantum computers, he said.

The technology could be transferred to domestic companies, Hsu said, adding that some have already made inquiries about possible cooperation.

Executives from Finland-based quantum computer company IQM visited Taiwan last year to discuss possible cooperation, Minister of Science and Technology Wu Tsung-tsong () said, adding that Taiwan, despite competing globally with limited funds, has achieved substantive results in quantum technology and is likely to become one of the nations with most potential to excel at it.

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