Centre updates

Tuning into quantum: scientists unlock signal frequency control of precision atom qubits

CQC2T scientists, led by Prof Michelle Simmons, have achieved a new milestone in their approach to creating a quantum computer chip in silicon, demonstrating the ability to tune the control frequency of a qubit by engineering its atomic configuration.

The team from UNSW Sydney successfully implemented an atomic engineering strategy for individually addressing closely spaced spin qubits in silicon. The scientists created engineered phosphorus molecules with different separations between the atoms within the molecule allowing for families of qubits with different control frequencies. Each molecule could then be operated individually by selecting the frequency that controlled its electron spin.

“The ability to engineer the number of atoms within the qubits provides a way of selectively addressing one qubit from another, resulting in lower error rates even though they are so closely spaced,” says Professor Simmons. “These results highlight the ongoing advantages of atomic qubits in silicon.”

Tuning in and individually controlling qubits within a 2 qubit system is a precursor to demonstrating the entangled states that are necessary for a quantum computer to function and carry out complex calculations.

“We can tune into this or that molecule – a bit like tuning in to different radio stations,” says Sam Hile, lead co-author of the paper and Research Fellow at UNSW. “It creates a built-in address which will provide significant benefits for building a silicon quantum computer.”

Read paper here
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CQC2T Director Professor Michelle Simmons is Australian of the Year 2018

On behalf of all researchers and partners of CQC2T, we congratulate Scientia Professor Michelle Simmons, who was tonight named 2018 Australian of the Year in recognition of her pioneering research and inspiring leadership in quantum computing.

Professor Simmons, who is a UNSW Professor of Physics and Director of the Australian Research Council Centre of Excellence for Quantum Computation and Communication Technology based at UNSW, was awarded the honour by the Australian Prime Minister, Malcolm Turnbull, at a ceremony at Parliament House in Canberra.

Chair of the Centre Advisory Committee, Peter Yates AM said “Michelle’s achievements and those of her team are hugely exciting for the recognition of science in Australia. Her leadership of the Centre and her field is an inspiration to us all’.

As Centre Director she leads a team of more than 200 researchers at eight Australian universities who are developing a suite of technologies for quantum computing, information storage and communications.

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Now hiring more than 30 researchers and students

With $83 million of new commercial backing and in partnership with recently formed company Silicon Quantum Computing Pty Ltd, we are seeking 20 researchers, engineers and technicians from industry and academia to accelerate the commercialisation of our world-leading research in silicon quantum electronics. More than 10 PhD positions are also available.

View the full list of available roles.