Pablo Bonilla Ataides (left) with co-author Dr Ben Brown from the School of Physics. Photo: Louise Cooper
What started out as a second-year physics project is making its way into Amazon Web Services (AWS) quantum computing program.
University of Sydney science undergraduate Pablo Bonilla Ataides has tweaked some computing code to effectively double its capacity to correct errors in the quantum machines being designed in the emerging technology sector.
The simple but ingenious change to quantum error correcting code has grabbed the attention of quantum researchers at the AWS Center for Quantum Computing in Pasadena, California, and the quantum technology programs at Yale University and Duke University in the United States.
Quantum technology is in its infancy, partly because we havent been able to overcome the inherent instability in the machines that produce so many errors, 21-year-old Mr Bonilla said.
In second-year physics I was asked to look at some commonly used error correcting code to see if we could improve it. By flipping half of the quantum switches, or qubits, in our design, we found we could effectively double our ability to suppress errors.
The research is published today in Nature Communications.
The results of the study, co-authored by Dr Steve Flammia who has recently moved from the University of Sydney to AWSs quantum computing effort, are to featurein the tech companys arsenal of error correction techniques as it develops its quantum hardware.
Dr Earl Campbell is a senior quantum research scientist at AWS. He said: We have considerable work ahead of us as an industry before anyone sees real, practical benefits from quantum computers.
This research surprised me.I was amazed that such a slight change to a quantum error correction code could lead to such a big impact in predicted performance.
The AWS Center for Quantum Computing team looks forward to collaborating further as we explore other promising alternatives to bring new, more powerful computing technologies one step closer to reality.
Errors are extremely rare in the digital transistors, or switches, that classical computers use to run our phones, laptops and even the fastest supercomputers.
However, the switches in quantum computers, known as qubits, are particularly sensitive to interference, or noise, from the external environment.
In order to make quantum machines work, scientists need to produce a large number of high-quality qubits. This can be done by improving the machines so they are less noisy and by using some capacity of the machines to suppress qubit errors below a certain threshold in order for them to be useful.
That is where quantum error correction comes in.
Assistant Professor Shruti Puri from the quantum research program at Yale University said her team is interested in using the new code for its work.
What amazes me about this new code is its sheer elegance. Its remarkable error-correcting properties are coming from a simple modification to a code that has been studied extensively for almost two decades, Assistant Professor Puri said.
It is extremely relevant for a new generation of quantum technology being developed at Yale and elsewhere. With this new code, I believe, we have considerably shortened the timeline to achieve scalable quantum computation.
Co-author Dr David Tuckett from the School of Physics said: Its a bit like playing battleships with a quantum opponent. Theoretically, they could place their pieces anywhere on the board. But after playing millions of games, we know that certain moves are more likely.
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