Researchers from the University of New South Wales (UNSW) have announced the results of a test they said has brought a quantum computer closer to reality. According to UNSW, the researchers have demonstrated an integrated silicon quantum bit (qubit) platform that combines both single-spin addressability, which the university explained is the ability to write information on a single spin qubit without disturbing its neighbours, and a qubit "read-out" process, which is expected to be vital for quantum error correction. "Moreover, their new integrated design can be manufactured using well-established technology used in the existing computer industry," UNSW added. Quantum computers will require millions of connected and integrated qubits and the tests completed by the researchers have proven it is possible to correct the errors that occur in fragile quantum systems. There are five leading hardware configurations for a quantum computer, and scientists the world over are trying to determine which is going to be the winner.
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 of engineers from the University of New South Wales (UNSW) has unveiled the design of a working chip that can integrate quantum interactions. According to UNSW, the design, which can be manufactured using mostly standard industry processes and components, comprises a "novel architecture" that allows quantum calculations to be performed using existing semiconductor components, known as CMOS -- complementary metal-oxide-semiconductor. CMOS is the basis for all modern chips. "We often think of landing on the Moon as humanity's greatest technological marvel, but creating a microprocessor chip with a billion operating devices integrated together to work like a symphony -- that you can carry in your pocket -- is an astounding technical achievement, and one that's revolutionised modern life," Andrew Dzurak, director of the Australian National Fabrication Facility at UNSW, said. "With quantum computing, we are on the verge of another technological leap that could be as deep and transformative. But a complete engineering design to realise this on a single chip has been elusive.
The University of New South Wales (UNSW) has announced the demonstration of a compact sensor for accessing information stored in the electrons of individual atoms, touted as a breakthrough that brings a scalable quantum computer in silicon one step closer. UNSW is banking on silicon being the key to building the first quantum computer and the results of the research, conducted within the Professor Michelle Simmons-led Simmons group at the Centre of Excellence for Quantum Computation and Communication Technology (CQC2T), show how this may be achieved. Quantum bits (qubits) made from electrons hosted on single atoms in semiconductors is a promising platform for large-scale quantum computers, the university believes, and creating qubits by precisely positioning and encapsulating individual phosphorus atoms within a silicon chip is the approach Simmons' teams are taking. Read also: Australia's ambitious plan to win the quantum race However, adding in all the connections and gates required for scale up of the phosphorus atom architecture was the challenge the researchers were faced with. "To monitor even one qubit, you have to build multiple connections and gates around individual atoms, where there is not a lot of room," Simmons said.
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.