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The electric dipole spin resonance (EDSR) combining strong spin-orbitcoupling (SOC) and electric-dipole transitions facilitates fast spin control ina scalable way, which is the critical aspect of the rapid progress maderecently in germanium (Ge) hole-spin qubits. However, a puzzle is raisedbecause centrosymmetric Ge lacks the Dresselhaus SOC, a key element in theinitial proposal of the hole-based EDSR. Here, we demonstrate that the recentlyuncovered finite k-linear Rashba SOC of 2D holes offers fast hole spin controlvia EDSR with Rabi frequencies in excellent agreement with experimental resultsover a wide range of driving fields. We also suggest that the Rabi frequencycan reach 500 MHz under a higher gate electric field or multiple GHz in areplacement by [110]oriented wells. These findings bring a deeper understandingfor hole-spin qubit manipulation and offer design principles to boost the gatespeed.

The emergent linear Rashba spin-orbit coupling offering the fast manipulation of hole-spin qubits in germanium