According to a recent report from the University of New South Wales official website, scientists at the school have demonstrated that they can build atomic-precision qubits in 3D devices and achieve precise inter-layer alignment and high-precision spin state measurements, resulting in the world's first 3D. The atomic-scale silicon quantum chip architecture is an important step toward building large-scale quantum computers.
In the latest study, Michelle Simmons, a professor at the Center for Excellence in Quantum Computing and Communication Technology at the University of New South Wales, led a research team that applied atomic-scale qubit fabrication technology to multilayer silicon crystals to obtain this 3D atomic-scale quantum chip. Architecture.
Simmons explained: "This atomic-level silicon qubit is a significant advancement. In order to be able to continually correct errors in quantum computing - is also a milestone in the field of quantum computing, we must be able to Parallel control of many qubits. The only way to achieve this is to use a 3D architecture, so in 2015 we developed a vertical crossover architecture and patented it. However, the manufacture of this multi-layer device faces a series of challenges. Now, through our new research, we prove that the 3D method we envisioned a few years ago is feasible."
Within the new 3D design, atomic qubits are aligned with control lines (very thin lines). In addition, the team also enabled nano-precision alignment of the different layers in the 3D device—they showed a technology that would achieve 5 nanometer precision alignment.
Finally, the researchers also obtained the qubit output of 3D devices in a single measurement without having to rely on the average of millions of experiments, which is expected to facilitate further upgrades of the technology.
Professor Simmons said that although there are at least ten years away from large-scale quantum computers, we are systematically studying large-scale architectures, which will lead us to the commercialization of the technology.
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