Overcoming disorder in superconducting globally driven quantum computing

Abstract

We study the impact of static disorder on a globally controlled superconducting quantum computing architecture based on a quasi-two-dimensional ladder geometry [Phys. Rev. Res. 7, L012065 (2025)]. Specifically, we examine how fabrication-induced inhomogeneities in qubit resonant frequencies and coupling strengths affect quantum state propagation and the fidelity of fundamental quantum operations. Using numerical simulations, we quantify the degradation in performance due to disorder and identify single-qubit rotations, two-qubit entangling gates, and quantum information transport as particularly susceptible. To address this challenge, we rely on pulse optimization schemes and, in particular, on the gradient ascent pulse engineering (GRAPE) algorithm. Our results demonstrate that, even for realistic levels of disorder, optimized pulse sequences can achieve high-fidelity operations, exceeding 99.9% for the three quantum operations, restoring reliable universal quantum logic and robust information flow. These findings highlight pulse optimization as a powerful strategy to enhance the resilience to disorder of solid-state globally driven quantum computing platforms.

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