Leveraging Digital Twins for high-fidelity entangling gates in Quantum Processing Units

Developing practical quantum computing architectures poses significant challenges, particularly in scaling high-fidelity entangling gates. Accurate digital twins are essential for understanding unexpected results and enhancing design performance. In this work, we demonstrate a successful reproduction of experimental data used for debugging and optimizing the bring-up process of a tunable transmon device, with a primary focus on the tune-up of an iSWAP gate [1,2]. To improve average fidelity, we explore various protocols for local phase measurements, exploiting the capabilities of qruise-toolset [3], a modular software designed for simulating and optimizing Quantum Processing Units. Additionally, we model and analyze the impact of environmental noise on gate performance. Our results demonstrate significant improvements in the overall bring-up process, highlighting the potential of our approach for advancing quantum computing.

References

[1] X. Li. et al., Phys. Rev. Applied 14, 024070 (2020)

[2] F. Yan et al., Phys. Rev. Applied 10, 054062 (2018)

[3] https://www.qruise.com/products/qruise-ml