Scientists have found a way to run several silicon qubits at the same time with remarkably high accuracy, addressing a major obstacle to building larger and more powerful quantum computers. The new technique kept accuracy at approximately 99.9 percent even when all five qubits were operating at once.
Quantum computers rely on qubits, the basic units of quantum information, which can represent more complex states than the bits used in conventional computers. Scaling these machines has been difficult because controlling many qubits together can introduce errors that degrade the results. The problem becomes more pronounced as the number of qubits grows, since each additional unit that must be controlled adds another opportunity for mistakes. The team's method addresses this hidden problem by allowing multiple qubits to be operated simultaneously without a corresponding loss of precision.
The achievement is significant because it demonstrates high fidelity across a full set of five qubits operating in parallel, rather than only in isolation or in pairs. This offers a concrete benchmark for how such systems can be expanded. Silicon is a material already central to conventional chip manufacturing, which may make silicon-based qubits a practical route for future development, since existing fabrication knowledge could be applied to building them.
The findings open the door to larger quantum processors with greater computing capacity. Processors built on this approach could eventually tackle problems that remain out of reach for today's machines, although the source material does not specify which problems those would be. The research also suggests that accuracy does not have to be sacrificed as systems grow more complex, a point that is central to the broader effort to make quantum computing useful outside the laboratory.
The source material does not detail how many additional qubits the approach could support, nor when such systems might be built. Further work will be needed to determine how the technique performs as the number of qubits continues to increase, and whether the same level of accuracy can be maintained at larger scales.
19
