UNSW scientists have shown that their pioneering single atom technology can be adapted to building 3D silicon quantum chips – with precise interlayer alignment and highly accurate measurement of spin states. The 3D architecture is considered a major step in the development of a blueprint to build a large-scale quantum computer.
UNSW researchers at the Centre of Excellence for Quantum Computation and Communication Technology (CQC2T) have shown for the first time that they can build atomic precision qubits in a 3D device – another major step towards a universal quantum computer.
The researchers, led by 2018 Australian of the Year and Director of CQC2T Professor Michelle Simmons, have demonstrated that they can extend their atomic qubit fabrication technique to multiple layers of a silicon crystal – achieving a critical component of the 3D chip architecture that they introduced to the world in 2015. This new research is published today in Nature Nanotechnology.
The group is the first to demonstrate the feasibility of an architecture that uses atomic-scale qubits aligned to control lines – which are essentially very narrow wires – inside a 3D design.
What’s more, team members were able to align the different layers in their 3D device with nanometer precision – and showed they could read out qubit states with what’s called ‘single shot’, i.e. within one single measurement, with very high fidelity.
“This 3D device architecture is a significant advancement for atomic qubits in silicon,” says Professor Simmons.
“To be able to constantly correct for errors in quantum calculations – an important milestone in our field – you have to be able to control many qubits in parallel.
“The only way to do this is to use a 3D architecture, so in 2015 we developed and patented a vertical crisscross architecture. However, there were still a series of challenges related to the fabrication of this multi-layered device. With this result we have now shown that engineering our approach in 3D is possible in the way we envisioned it a few years ago.”
In this paper, the team has demonstrated how to build a second control plane or layer on top of the first layer of qubits.
“It’s a highly complicated process, but in very simple terms, we built the first plane, and then optimised a technique to grow the second layer without impacting the structures in first layer,” explains CQC2T researcher and co-author, Dr Joris Keizer.
“In the past, critics would say that that’s not possible because the surface of the second layer gets very rough, and you wouldn’t be able to use our precision technique anymore – however, in this paper, we have shown that we can do it, contrary to expectations.”
The team members also demonstrated that they can then align these multiple layers with nanometer precision.
“If you write something on the first silicon layer and then put a silicon layer on top, you still need to identify your location to align components on both layers. We have shown a technique that can achieve alignment within under five nanometers, which is quite extraordinary,” Dr Keizer says.
Lastly, the researchers were able to measure the qubit output of the 3D device single shot – i.e. with a single, accurate measurement, rather than having to rely on averaging out millions of experiments.
“This will further help us scale up faster,” Dr Keizer explains.
Professor Simmons says that this research is a milestone in the field.
“We are working systematically towards a large-scale architecture that will lead us to the eventual commercialisation of the technology.
The Latest on: 3D silicon quantum chips
via Google News
The Latest on: 3D silicon quantum chips
- Taming Silicon to Interact With Light for Next-Generation Microelectronicson June 12, 2021 at 7:55 am
Skoltech researchers and their colleagues from RAS Institute for Physics of Microstructures, Lobachevsky State University of Nizhny Novgorod, ITMO University, Lomonosov Moscow State University, and A.
- Trending: Quantum Chip Market is Booming Worldwide with Top Emerging Key Players: Origin Quantum Computing Technologyon June 10, 2021 at 2:33 am
Quantum Chip market Report LOS ANGELES United States QY offers an overarching research and analysis based study on Global Quantum Chip Market Report History and Forecast 2016 2027 Breakdown Data by ...
- Perlmutter, said to be the world’s fastest AI supercomputer, comes onlineon May 27, 2021 at 12:27 pm
The Perlmutter system, according to Nvidia Corp., whose graphics chips it uses in large numbers ... such as creating a 3D map of the universe and probing subatomic interactions for green energy ...
- Think Silicon and Ambiq Enable Ultra-Low Power IoT Devices with Smartphone-Class, 3D-Like Graphicson May 19, 2021 at 2:35 am
ATHENS, Greece and AUSTIN, TX, May 19, 2021 – Think Silicon S.A., the leading provider of ultra-low power GPU IP for embedded systems, and Ambiq, a technology leader recognized in ultra-low power ...
- Microsystems Engineering Ph.D.on May 10, 2021 at 5:00 pm
The Kate Gleason College of Engineering’s doctorate degree in microsystems engineering is a multidisciplinary program that builds upon the fundamentals of traditional engineering and science, combined ...
- Tech Tent: The new 'space race' for computer chipson March 5, 2021 at 5:41 am
Silicon chips are at the ... are spending a lot of money on quantum computers, incredibly fast supercomputers. And all of these things require chips," she explains. Taiwan, home of TSMC, is ...
- Graphene Descriptionon August 14, 2020 at 7:56 pm
Graphene possesses other amazing characteristics: Its high electron mobility is 100x faster than silicon ... graphene with 0D quantum dots or nanoparticles, 1D nanostructures such as nanowires or ...
- A Review Paper on CMOS, SOI and FinFET Technologyon August 14, 2020 at 7:03 pm
The chips of today contain more than ... Double Gate Structure Modern FinFETs are 3D structures as shown in the Figure 9 also called tri-gate transistor. FinFETs can be implemented either on bulk ...
- Nanotechnology in Canada – companies, research, and degree programson September 9, 2017 at 7:14 pm
The company develops and synthesizes metal-free, biocompatible silicon quantum dots and semiconductor nanoparticles ... Canada that specializes in fabrication of membrane-based optical chips for X-ray ...
- Researchers Design Full-Scale Silicon Architecture for Quantum Computerson November 10, 2015 at 6:45 am
Scientists and engineers at the University of New South Wales in Australia have designed a 3D silicon chip architecture that ... The design is based on single atom quantum bits and will provide ...
via Bing News