The lifespan of qubits can be more than a hundred times longer than before. Hitachi successfully developed new quantum manipulation technology

According to news from this site on June 21, Hitachi recently announced that it has successfully developed a new quantum manipulation technology that can increase the life of qubits to more than a hundred times the previous level.

Hitachi adopts the "silicon-based semiconductor electronic spin qubit" technology route in the research and development of quantum computers. This route can use mature semiconductor technology to integrate qubits on a large scale.

But this technical route also has its own problems: The spin of the semiconductor atomic nucleus will produce "noise", which causes the electron spin to become unstable, thus reducing the life of the electron spin qubit and affecting the future Implementation of quantum algorithms and error correction.

The Hitachi research team is the first in the world to develop a technology that realizes "Concatenated Continuous Driving" (original text: Concatenated Continuous Driving) qubit manipulation by phase modulating the microwaves that manipulate qubits.

Using this technology, Hitachi researchers can manipulate qubits through two orthogonal rotation axes, Reduce the impact of external noise on electron spin, and significantly extend the life of qubits, Reaching more than a hundred times the previous level.

Hitachi claims that the above experimental results show that silicon quantum computers can not only achieve large-scale qubit integration, but also allow these qubits to operate stably, which is a feasible and excellent quantum computing route.

Hitachi will continue to accelerate the implementation of quantum algorithms and research on quantum computing error correction based on this technology, with a view to pushing quantum computers into practical applications as soon as possible.

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