Flying Spin Qubits in Quantum Dot Arrays Driven by Spin-Orbit Interaction

Abstract

Quantum information transfer is fundamental for scalable quantum computing in any potential platform and architecture. Hole spin qubits, owing to their intrinsic spin-orbit interaction (SOI), promise fast quantum operations which are fundamental for the implementation of quantum gates. Yet, the influence of SOI in quantum transfer protocols remains an open question. Here, we investigate flying spin qubits mediated by SOI, using shortcuts to adiabaticity protocols, i.e., the long-range transfer of spin qubits and the quantum distribution of entangled pairs in semiconductor quantum dot arrays. We show that electric field manipulation allows dynamical control of the SOI, enabling simultaneously the implementation of quantum gates during the transfer, with the potential to significantly accelerate quantum algorithms. By harnessing the ability to perform quantum gates in parallel with the transfer, we implement dynamical decoupling schemes to focus and preserve the spin state, leading to higher transfer fidelity.

27 pages, 14 figures, 1 table

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Cited by in corpus (6)

• Long-range spin transport in asymmetric quadruple quantum dots configurations
• Spin qubit shuttling between coupled quantum dots with inhomogeneous Landé g-tensors
• Switchable spin-photon coupling with hole spins in single-quantum dots
• Sweet-spot protection of hole spins in sparse arrays via spin-dependent magnetotunneling
• Quantum state transfer and maximal entanglement between distant qubits using a minimal quasicrystal pump
• Quantum entanglement response to pulsed gate modulation