Shuttling check qubits in a spin-qubit railway and using the XZZX surface code under dephasing bias achieves a distance-7 megaquop footprint at 10^{-3} physical error rate.
Industrial300mmwaferprocessedspinqubitsinnatural silicon/silicon-germanium
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Near a valley level anti-crossing in a Si-MOS quantum dot, inter-valley spin coupling activates an electric-dipole transition that enhances the electron spin Rabi frequency.
Neural-network autotuning combined with FPGA-accelerated RF reflectometry reduces stability-diagram acquisition time by 9.8x and total single-electron-regime initialization time by 2.2x in a SiGe quantum dot.
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Surface-Code Thresholds and Qubit Footprints in Shuttling-Based Spin-Qubit Railways
Shuttling check qubits in a spin-qubit railway and using the XZZX surface code under dephasing bias achieves a distance-7 megaquop footprint at 10^{-3} physical error rate.