Enhancing Hole Spin Qubit Coherence through Confinement-Modulated Shuttling

Semiconductor spin qubits have emerged as a promising platform for scalable quantum information processing, owing to their compatibility with established semiconductor fabrication techniques. A key challenge toward large-scale architectures is the implementation of long-range coupling between distant qubits. One promising approach is to coherently move spins using conveyor-belt shuttling. In this work, we propose a novel technique to enhance the coherence of hole spin qubits during such shuttling operations. Due to the confinement-dependent g-tensor in these systems, we can drive the qubit by modulating the confinement potential throughout the transport protocol. By driving in certain ways, we suppress the effects of low-frequency noise, which typically limits coherence in spin qubits. Our results open a pathway toward more robust and noise-resilient shuttling operations for scalable spin-based quantum processors.