Taiwan builds 20-qubit quantum computer in domestic R&D push

Researchers at Taiwan’s Academia Sinica have developed a 20-qubit superconducting quantum computer entirely through domestic research and fabrication efforts, marking a significant advancement from their earlier 5-qubit system introduced in 2023. This new platform, now accessible to local researchers, demonstrates Taiwan’s capability to produce larger-scale, stable quantum chips suitable for complex quantum simulations and testing. The project leveraged semiconductor manufacturing expertise to overcome challenges in qubit uniformity, coupling precision, and interference, employing techniques like laser trimming and chip stacking to enhance performance and reduce crosstalk. A major breakthrough of the 20-qubit system is the substantial increase in qubit coherence time—from 15–30 microseconds in the previous model to 530 microseconds—allowing quantum states to remain stable for longer periods, which is critical for practical quantum computing. This improvement reflects tighter control over fabrication, packaging, and noise reduction, addressing the sensitivity of superconducting qubits to electromagnetic disturbances. Academia Sinica plans to further