Phys.org November 22, 2024
Striving for higher gate fidelity is crucial not only for enhancing existing noisy intermediate-scale quantum devices, but also for unleashing the potential of fault-tolerant quantum computation through quantum error correction. Researchers in Japan proposed theoretical scheme, the double-transmon coupler (DTC), that aims to achieve both suppressed residual interaction and a fast high-fidelity two-qubit gate simultaneously, particularly for highly detuned qubits. The state-of-the-art fabrication techniques and a model-free pulse-optimization process would enable not only efficient fault-tolerant quantum computing with error correction but also effectively mitigate errors in current noisy intermediate-scale quantum devices. According to the researchers the performance of the DTC scheme demonstrated its potential as a competitive building block for superconducting quantum processors… read more. Open Access TECHNICAL ARTICLE
(a) Schematic circuit diagram of the DTC scheme consisting of two data qubit transmons… Credit: Phys. Rev. X 14, 041050, 21 November, 2024