Phys.org April 23, 2020
A major hurdle for the scalability in quantum error-correction architecture using superconducting systems is the wiring problem, where qubits internal to a chipset become difficult to access by the external control/readout lines. An international team of researchers (Japan, Australia) carried out experiments to examine the feasibility of the new airbridge component whose measured quality factor of the airbridged resonator is below the simulated surface-code threshold required for a coupling resonator and not limit simulated gate fidelity. The measured crosstalk between crossed resonators is at most −49 dB in resonance. The spatial and frequency separation between the resonators should result in relatively limited crosstalk between them. This architecture and the preliminary tests indicate the possibility that a large-scale, fully error-corrected quantum computer could be constructed by monolithic integration technologies without additional overhead or special packaging know-how…read more. Open Access TECHNICAL ARTICLE
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