A bunch of scientists led by 2018 Australian of the Year Professor Michelle Simmons has achieved the primary two-qubit gate between atom qubits in silicon — a serious milestone on the group’s quest to construct an atom-scale quantum computer. The pivotal piece of analysis was revealed at this time within the journal Nature.
A two-qubit gate is the central constructing block of any quantum computer — and the united states staff’s model of it’s the quickest that has ever been demonstrated in silicon, finishing the operation in 0.8 nanoseconds, which is ~200 occasions quicker than different current spin-primarily based two-qubit gates.
Within the Simmons’ group method, a two-qubit gate is an operation between two electron spins — similar to the position that classical logic gates play in standard electronics. For the primary time, the crew was in a position to construct a two-qubit gate by putting two-atom qubits nearer collectively than ever earlier than, after which — in actual-time — controllably observing and measuring their spin states.
The staff’s distinctive strategy to quantum computing requires not solely the position of particular person atom qubits in silicon however all of the related circuitry to initialize, management and skim-out the qubits on the nanoscale — an idea that requires such beautiful precision it was long regarded as unattainable. However, with this main milestone, the workforce is now positioned to translate their expertise into scalable processors.
UNSW Science Dean, Professor Emma Johnston AO, says this key paper additional reveals simply how ground-breaking Professor Simmons’ analysis is.