Communications of the ACM
Australian Teams Set New Records for Silicon Quantum Computing
Researchers at the University of New South Wales say they have developed two types of quantum bits that can process data with accuracy exceeding 99 percent.
Credit: Stephanie Simmons, UNSW
University of New South Wales (UNSW) researchers say they have developed two types of quantum bits that each process data with an accuracy of greater than 99 percent.
"We've now come up with two parallel pathways for building a quantum computer in silicon, each of which shows this super accuracy," says UNSW professor Andrea Morello.
The researchers developed a device, similar to conventional silicon transistors, that creates an "artificial atom" qubit. "It is really amazing that we can make such an accurate qubit using pretty much the same devices as we have in our laptops and phones," says UNSW researcher Menno Veldhorst.
The researchers also developed a "natural" phosphorus atom qubit. "The phosphorus atom contains in fact two qubits: the electron, and the nucleus," says UNSW researcher Juha Muhonen. "With the nucleus in particular, we have achieved accuracy close to 99.99 percent."
The high-accuracy operations for both qubits is achieved by placing each inside a thin layer of specially purified silicon, containing only the silicon-28 isotope, which is perfectly non-magnetic and does not disturb the quantum bit.
"For our two groups to simultaneously obtain these dramatic results with two quite different systems is very special, in particular because we are really great mates," says UNSW professor Andrew Dzurak.
From UNSW Newsroom
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