Communications of the ACM
Advanced Control of a Six-Qubit Quantum Processor in Silicon
The research shows that it's possible to increase the silicon spin qubit count while keeping the same precision as for single qubits.
Credit: Nature
Researchers at QuTech, a collaboration between the Delft University of Technology and TNO, the Netherlands Organization for Applied Scientific Research, have developed a chip with six silicon-based spin qubits that operates with a low-error rate. The research is seen as a stepping stone for the development of scalable silicon-based quantum computers.
The researchers created an array of six "quantum dots" made of individual electrons spaced 90 nanometers apart. They controlled and measured the spin of the individual electrons and facilitated their interaction using microwave radiation, magnetic fields, and electric potentials. The work is described in Nature.
"In this research we push the envelope of the number of qubits in silicon, and achieve high initialization fidelities, high readout fidelities, high single-qubit gate fidelities, and high two-qubit state fidelities," says Lieven Vandersypen, QuTech's director of research. "What really stands out though is that we demonstrate all these characteristics together in one single experiment on a record number of qubits."
From QuTech
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