Two research teams working in the same laboratories at UNSW Australia have found distinct solutions to a critical challenge that has held back the realisation of super powerful quantum computers.
The teams created two types of quantum bits, or “qubits” – the building blocks for quantum computers – that each process quantum data with an accuracy above 99%. The two findings have been published simultaneously today in the journal Nature Nanotechnology.
“For quantum computing to become a reality we need to operate the bits with very low error rates,” says Scientia Professor Andrew Dzurak, who is Director of the Australian National Fabrication Facility at UNSW, where the devices were made.
“We’ve now come up with two parallel pathways for building a quantum computer in silicon, each of which shows this super accuracy,” adds Associate Professor Andrea Morello from UNSW’s School of Electrical Engineering and Telecommunications.
The UNSW teams, which are also affiliated with the ARC Centre of Excellence for Quantum Computation & Communication Technology, were first in the world to demonstrate single-atom spin qubits in silicon, reported in Nature in 2012 and 2013.
Now the team led by Dzurak has discovered a way to create an “artificial atom” qubit with a device remarkably similar to the silicon transistors used in consumer electronics, known as MOSFETs. Post-doctoral researcher Menno Veldhorst, lead author on the paper reporting the artificial atom qubit, says, “It is really amazing that we can make such an accurate qubit using pretty much the same devices as we have in our laptops and phones”.
Meanwhile, Morello’s team has been pushing the “natural” phosphorus atom qubit to the extremes of performance. Dr Juha Muhonen, a post-doctoral researcher and lead author on the natural atom qubit paper, notes: “The phosphorus atom contains in fact two qubits: the electron, and the nucleus. With the nucleus in particular, we have achieved accuracy close to 99.99%. That means only one error for every 10,000 quantum operations.”
Dzurak explains that, “even though methods to correct errors do exist, their effectiveness is only guaranteed if the errors occur less than 1% of the time. Our experiments are among the first in solid-state, and the first-ever in silicon, to fulfill this requirement.”
The Latest on: Quantum computing
via Google News
The Latest on: Quantum computing
- Will Google bail if its quantum computer doesn’t turn a quick profit?on October 30, 2019 at 11:22 am
QUANTUM computing has hit the big time. In a paper leaked online just over a month ago, Google said it had performed the first quantum computation that was beyond an ordinary machine, a milestone ...
- Timeline: A brief history of quantum computing from 1980 to 2100on October 29, 2019 at 10:50 am
Google says it has reached a milestone known has quantum supremacy, here are the quantum computing milestones that led to this point. 1980 – Paul Benioff describes the first quantum mechanical model ...
- Welcome to the Age of Quantum Computingon October 29, 2019 at 3:00 am
Has the era of quantum computing finally dawned? In a field long plagued by hype and hubris, there’s reason for some cautious optimism. A team of scientists at Google’s research lab announced last ...
- Why Quantum Computers Will Be Super Awesome, Somedayon October 28, 2019 at 11:44 am
Nobel Prize-winning physicist Richard Feynman was the first to suggest that the mind-bending properties of quantum mechanics could be harnessed to make a new kind of computer. Almost 40 years later ...
- Deal: Ride the quantum computing wave for just $19on October 28, 2019 at 5:29 am
Last week, Google claimed quantum computing has finally surpassed the most powerful supercomputer on earth. It can perform a calculation in three minutes and 20 seconds that would take today’s most ...
- Quantum computing’s ‘Hello World’ momenton October 26, 2019 at 8:14 am
Does quantum computing really exist? It’s fitting that for decades this field has been haunted by the fundamental uncertainty of whether it would, eventually, prove to be a wild goose chase. But ...
- What Google's 'quantum supremacy' means for the future of computingon October 25, 2019 at 6:43 am
For the first time ever, a quantum computer has performed a computational task that would be essentially impossible for a conventional computer to complete, according to a team from Google.
- Google's quantum supremacy is only a first taste of a computing revolutionon October 25, 2019 at 5:54 am
One of five Google quantum computers at a lab near Santa Barbara, California. Google's success at achieving quantum supremacy sounds like a momentous victory. But really, it's just the first step in ...
- Quantum leap in computing as Google claims 'supremacy' (Update)on October 25, 2019 at 1:30 am
... claimed Wednesday to have achieved a near-mythical state of computing in which a new generation of machine vastly outperforms the world's fastest super-computer, known as "quantum supremacy". A ...
- Quantum Computing Is Here! But Also Not Reallyon October 24, 2019 at 11:52 am
Wednesday was warm in Santa Barbara but Google’s quantum computing labs were pleasingly cool—colder than outer space in some spots. Three fridge-sized silver cylinders hung below crowns of ducts and ...
via Bing News