Quantum

Researchers Curb Unwanted Transitions in Ultrafast Quantum Gates

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Briefings

Researchers from Forschungszentrum Jülich achieved ultrafast quantum gate operations in 6.8 nanoseconds with 99.98% accuracy, significantly reducing unwanted multiphoton transitions via the R2D pulse-shaping method. This breakthrough, part of the QSOLID project, represents a new benchmark for superconducting qubits but remains limited to single-qubit testing.

Key points

• Researchers from Forschungszentrum Jülich achieved 99.98% accuracy in single-qubit operations lasting 6.8 nanoseconds using the R2D pulse-shaping method.
• The method reduced unwanted multiphoton transitions by more than 20 times compared to the established DRAG method.

Context

This work, published in Nature Communications, demonstrates that extremely short switching times and high precision can be achieved simultaneously in superconducting quantum computers, addressing critical factors for resource-intensive error correction.

Limitations

Results were obtained on a single isolated transmon qubit; performance in larger processors and two-qubit operations remains untested.

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