Monday , October 25 2021

Quantum computing scale: The Australian scientists get a compact and sensitive reading the qubit



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IMAGE: The authors of the paper, from left to right: Ph.D. student Mark R. Hogg; Professor Michelle Simmons; Post Doc Matthew G. House; Ph.D. Prasanna Pakkiam student; Post Doc …
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Credit: UNSW Sydney

The group of Professor Michelle Simmons f & # 39; UNSW Sydney showed a compact sensor to access information stored in the electrons & # 39; individual atoms – jġibna advance one step closer to scalable quantum computing in silicon.

The research, carried out within the Simmons group in Center & # 39; Excellence for Quantum Computation and Communication Technology (CQC2T) with PhD student Prasanna Pakkiam as main author, was published today in the journal prestigious Physical Review X (PRX).

Quantum bits (or qubits) made of electrons in atoms hosted on a single & # 39; semiconductors are promising platform for quantum computers on a large scale, thanks to their long-term stability. Creating & # 39; & # 39 qubits through; Precise positioning and encapsulation & # 39; & # 39 atoms; Individual phosphorus in & # 39; silicon chip is unique Australian approach that the team & # 39; Simmons was leading globally.

But the increase in connections and gates necessary for scaling architecture of phosphorus atom was going to be a challenge – the & # 39; now.

"To monitor kwbit even one, you build connections and multiple degrees around individual atoms, where there is not much space," says Professor Simmons. "In addition, you need qubits of & # 39; quality nearby so they can talk to & # 39; other – you can & # 39; only be achieved if you have the least infrastructure & # 39; around gate as possible & # 39; is. "

Compared to & # 39; other approaches to become a quantum computer, the system of & # 39; Simmons already had a density of & # 39; relatively low door. Conventional measurement is still required at least 4 degrees per qubit: 1 and 3 for controlling to read.

By integrating sensor read in & # 39; one of the gates of & # 39; control of the UNSW team could & # 39; subverting & # 39; for two gates: one for control and one for reading.

"Not only our system is more compact, but by integrating superconducting circuit attached to the door now we have the sensitivity to determine the quantum state of the qubit by measuring whether electrons move between two neighboring atoms", said the main author Pakkiam.

"And we have demonstrated that we can do this in & # 39; & # 39 with real-time, only one considered it – one shot – without the need to repeat the experiment and average the results."

"This represents a major breakthrough in the way we read the information embedded in our qubits", concludes Simmons. "The result confirms that the reading b & # 39; one door & # 39; qubits now reach the sensitivity required to perform the correction & # 39; quantum error required for scalable quantum computer."

The first Australian company quantum computing

Since May 2017, the first company information quantum of Australia, Silicon Quantum Computing Pty Limited (SQC), has been working to develop and commercialize quantum computer based on a series of & # 39; intellectual property developed at the Australian Center & # 39; Excellence for Quantum Computation and Communication Technology (CQC2T).

Connected to & # 39; CQC2T on the campus of NUSW f & # 39; Sydney, SQC is investing in & # 39; & # 39 portfolio; projects & # 39; kwantistiċi parallel technological development conducted by leading researchers, including Australian of the Year and Laureate Professor Michelle Simmons. Its aim is to produce a device & # 39; & # 39 demonstration; 10 qubit in & # 39; silicon until 2022 as the precursor to commercial quantum computer based on commercial silicon.

SQC believes that quantum computers will ultimately have a significant impact on the global economy, b & # 39; possible applications in design software, machine learning, scheduling and logistics planning, financial analysis, modeling of the market of stocks, software and hardware verification, climate models, testing, and early detection and disease prevention.

Created by & # 39; & # 39 unique coalition; governments, corporations and universities, competing with SQC & # 39; some of the largest multinational & # 39; technology and laboratories & # 39; foreign research.

As well as develop its own proprietary technology and its intellectual property, SQC will continue to work with & # 39; CQC2T and other participants in the ecosystem of the Australian Quantum Computer and International, to build and develop the computing industry quantum silicon in Australia and, ultimately, and services for global markets.

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Isabelle DUBACH

Media Content Manager

Faculties of Science, Medicine and Engineering

E: [email protected]

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Disclaimer & # 39; responsibility: AAAS and EurekAlert! not responsible for the accuracy of & # 39; releases & # 39; news posted on EurekAlert! by contributing institutions or for the use of & # 39; any information via EurekAlert system.

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