High-fidelity quantum computing in silicon may now be a reality.
Three new papers in the journal Nature have shown that silicon-based quantum computing systems can be almost error-free — a crucial feature for scaling up reliable quantum computing. There is still a long road ahead for developing these systems to tackle complex computations with real-world applications, but researchers say that three separate demonstrations of success are a promising breakthrough.
“I think it shows that we’re on a good trajectory as a community,” says Lieven Vandersypen, a Delft Univ. of Technology professor of quantum nanoscience who led one of the research teams. “It’s always better if not just one group can achieve something, but several.”
Quantum computers make calculations using quantum mechanical principles. Qubits, instead of bits, store information. While bits can either be coded as 0 or 1, qubits can be poised in both states until measured, a state called superposition. Superposition is often explained with the example of Schrödinger’s cat, the famous imaginary feline that can be both alive and dead within its box, at least until the box is opened...
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