Researchers at Finland's Aalto University have achieved a breakthrough in quantum computing by extending the coherence time of a transmon qubit to the millisecond level, setting a new global scientific record, the university announced on Tuesday, reported Xinhua.
The milestone, published in the journal Nature Communications, marks a significant improvement over previous records, which had reached approximately 0.6 milliseconds. According to Aalto University, the researchers measured a maximum echo coherence time of one millisecond, with a median time of 0.5 milliseconds, both of which surpassed earlier benchmarks.
Qubit coherence is a key parameter in quantum computing, determining how long a qubit can maintain its quantum state. Longer coherence times enable quantum computers to perform more complex and error-free computations, the researchers explained.
Longer coherence times also allow more calculations on noisy quantum systems while reducing the resources needed for quantum error correction – a step toward fault-tolerant, noiseless quantum computing, the university noted.
Experts say the findings represent an important step toward scalable, reliable quantum computers, laying another foundation for future advancements in the global pursuit of quantum technologies.
The achievement was made by the Quantum Computing and Devices (QCD) research group at Aalto University's Department of Applied Physics. The work is part of the Academy of Finland Centre of Excellence in Quantum Technology and the Finnish Quantum Flagship initiative.
The qubit was fabricated by the QCD group at Aalto using high-quality superconducting film supplied by the Technical Research Centre of Finland.
"This landmark achievement has strengthened Finland's standing as a global leader in the field, moving the needle forward on what can be made possible with the quantum computers of the future," said Mikko Mottonen, professor of quantum technology and head of the QCD group.
Following the successful demonstration, the research team has also opened new research positions to accelerate progress in the field.
- Finnish researchers
- Quantum record
- Qubit coherence
Source: www.dailyfinland.fi
