Hitachi Develops New Quantum Manipulation Technology

TapTechNews June 21 - Hitachi recently announced the successful development of a new quantum manipulation technology that can increase the lifetime of qubits to more than 100 times the previous level.

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

However, this technical route also has its own problems: The spin of the semiconductor nucleus will generate "noise", which causes the electron spin to become unstable, thereby reducing the lifetime of the electron spin qubit and affecting the realization of future quantum algorithms and error correction.

The Hitachi research team has taken the lead in the world in developing a technology that realizes "cascaded continuous driving" (TapTechNews note: originally ConcatenatedContinuousDriving) qubit manipulation by phase-modulating the microwave that manipulates the qubit.

By using this technology, Hitachi researchers can manipulate the qubit through two orthogonal rotation axes, reducing the impact of external noise on the electron spin and significantly extending the lifetime of the qubit, reaching more than 100 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 make these qubits operate stably, which is a feasible and excellent quantum computing route.

Hitachi will continue to accelerate the realization of quantum algorithms and the research on quantum computing error correction on the basis of this technology, in order to bring quantum computers into practical applications as soon as possible.