A theory developed out of the University of Sydney (USyd) has been successfully demonstrated by engineers at the University of New South Wales (UNSW), a joint research paper has detailed. Calling it a "world-record result", USyd said the experimental result saw the reduction of errors in semiconductor "spin qubits" -- quantum bits -- which are a type of building block for quantum computers. A spin qubit is a quantum bit that encodes information based on the quantised magnetic direction of a quantum object, such as an electron. The experiment demonstrated error rates as low as 0.043%, which the pair of universities said was lower than any other spin qubit. The result was achieved using the theoretical work of quantum physicists at USyd's Nano Institute and School of Physics and performed by UNSW engineers.
A team at the University of Sydney (USyd) working with Microsoft, alongside Stanford University in the US, has announced the development of a miniaturised component touted as essential for the scale-up of quantum computing. According to the university, the work represents the first practical application of a new phase of matter that was first discovered in 2006, "topological insulators", which are materials that operate as insulators in the bulk of their structures, but have surfaces that act as conductors. "Manipulation of these materials provide a pathway to construct the circuitry needed for the interaction between quantum and classical systems," explained USyd in a statement. As a result, USyd said they are vital for building a practical quantum computer. The Sydney team developed a microwave circulator, which acts like a traffic roundabout by ensuring that electrical signals only propagate in one direction, clockwise or anti-clockwise, as required.
The University of Sydney has been awarded a slice of a multimillion dollar research grant from the United States Office of the Director of National Intelligence to advance its research in quantum computing. The undisclosed funding chunk will be injected into the Quantum Control Laboratory, which is led out of the university's month-old AU 150 million Sydney Nanoscience Hub. Additionally, an international consortium which includes the University of Sydney has also been selected by the US government-led LogiQ program to help deliver a logical quantum-bit (qubit) based on trapped ions. The LogiQ program is an initiative run by US government agency the Intelligence Advanced Research Projects Activity, which is seeking creative technical solutions to the challenge of encoding imperfect physical qubits into a logical qubit, with a quibit forming the foundations for quantum computing. According to Sydney University's associate professor Michael Biercuk, a logical qubit is considered a holy grail in quantum information.