Hole spin qubits in semiconductor quantum dots (QDs) are promising candidates for quantum information processing due to their weak hyperfine coupling to nuclear spins, and to the strong spin-orbit coupling which allows for rapid operation time. We propose a coherent control on two heavy-hole spin qubits in a double QD by a fast adiabatic driving protocol, which helps to achieve higher fidelities than other experimentally commonly used protocols as linear ramping, π-pulses or Landau-Zener passages. Using fast quasiadiabatic driving via spin-orbit coupling, it is possible to reduce charge noise significantly for qubit manipulation and achieve high robustness for the qubit initialization. We also implement one and two-qubit gates, in particular, NOT, CNOT, and SWAP-like gates, of hole spins in a double QD achieving fidelities above 99%, exhibiting the capability of hole spins to implement universal gates for quantum computing.
@article{arxiv.2204.07453,
title = {Quantum control of hole spin qubits in double quantum dots},
author = {D. Fernandez-Fernandez and Y. Ban and G. Platero},
journal= {arXiv preprint arXiv:2204.07453},
year = {2022}
}