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Scalable Robust Quantum Control for Semiconductor Spin Qubits with Always-on Couplings by Hai, Yong-Ju; Zhang, Shihang; Guan, Haoyu; Huang, Peihao; He, Yu; Deng, Xiu-Hao is a scholarly article available to read on EtoBox.

What is Scalable Robust Quantum Control for Semiconductor Spin Qubits with Always-on Couplings about?

We demonstrate a robust quantum control framework that enables high-fidelity gate operations in semiconductor spin qubit systems with always-on couplings. Always-on interactions between qubits pose a fundamental challenge for quantum processors by inducing correlated errors that can trigger chaotic dynamics. Our approach suppresses both static coupling noise and time-dependent crosstalk without requiring high on/off ratio tunable couplers. Significantly, these pulses also prevent the emergence of chaotic entanglement growth in deep quantum circuits, preserving coherence in large multi-qubit systems. By relaxing hardware constraints on coupling control, our method provides a practical path toward scaling semiconductor quantum processors within existing fabrication capabilities, with particular relevance for silicon spin qubit architectures where high-contrast coupling modulation remains challenging.

Author

Hai, Yong-Ju; Zhang, Shihang; Guan, Haoyu; Huang, Peihao; He, Yu; Deng, Xiu-Hao

Published

2025

Language

EN