Centre updates

Congratulations to Prof Tim Ralph, new AAS Fellow

Professor Tim Ralph, CQC2T node director at the University of Queensland

CQC2T is proud to congratulate Professor Tim Ralph on being admitted as a Fellow of the Australian Academy of Science. Tim is a member of the CQC2T Executive Team and node director at the University of Queensland. He is a founding member of the Centre.

Prof Ralph was awarded the honour for his pioneering research in quantum optical information theory. He will deliver a brief presentation on his work along with other new Fellows at the Science at the Shine Dome 2017 symposium tomorrow, 23 May.

Read more at UQ News.

See the full list of 2017 Fellows at the AAS website.

Atomic-scale triumph: CQC2T researchers achieve high fidelity two-qubit readout with record spin times

High-fidelity sequential readout of two electron spins. Credit: Watson et al

Scaling up quantum computers remains one of the toughest challenges facing quantum computing research teams around the world. But new results published in Science Advances show that single-atom qubits in silicon can be engineered with atomic precision to have a five-fold increase in spin relaxation times.

These two-qubit devices are the only semiconductor-based qubits where both qubits have demonstrated the extremely high fidelities required for fault tolerant operation.

The two-qubit readout results were published in Science Advances.

CQC2T researchers demonstrate first single-atom quantum memory in silicon

A team of CQC2T researchers led by Prof Andrea Morello have demonstrated a single-atom quantum memory in silicon for the first time.

Process tomography of the quantum memory protocol, showing a process fidelity better than 80 per cent

The team was able to store and retrieve quantum information encoded using the nucleus of a phosphorus atom embedded in silicon, achieving storage times of up to 80 milliseconds. Quantum memory technology could enable quantum information to be stored while processing operations are carried out, extending the potential capabilities of a solid-state quantum computer.

The results were published in Quantum Science and Technology.

Read more at Seeker.