Effects of the spin-orbit coupling on hole spin qubits

Recent experimental and theoretical progress in hole spin qubits in germanium quantum dots made it a promising platform for scalable semiconductor qubit devices. One of the main advantages of the hole qubits over the electron qubits is the strong spin-orbit (SO) coupling, which allows the implementation of electric dipole spin resonance (EDSR) without microstructures to create local magnetic fields for single-qubit gate operations. But the presence of the SO coupling also makes the hole qubits vulnerable to charge noises. We present a theoretical analysis of the effects of the Rashba-type SO coupling on the hole spin qubits in a realistic quantum dot confinement with anisotropy and anharmonicity. Conditions for EDSR operations and for conserving the spin qubit coherence will be presented.