High-fidelity spin qubit shuttling via large spin-orbit interaction

Abstract

Shuttling spins with high fidelity is a key requirement to scale up semiconducting quantum computers, enabling qubit entanglement over large distances and favoring the integration of control electronics on-chip. To decouple the spin from the unavoidable charge noise, state-of-the-art spin shuttlers try to minimize the inhomogeneity of the Zeeman field. However, this decoupling is challenging in otherwise promising quantum computing platforms such as hole spin qubits in silicon and germanium, characterized by a large spin-orbit interaction and electrically-tunable qubit frequency. In this work, we show that, surprisingly, the large inhomogeneity of the Zeeman field stabilizes the coherence of a moving spin state, thus enabling high-fidelity shuttling also in these systems. We relate this enhancement in fidelity to the deterministic dynamics of the spin which filters out the dominant low-frequency contributions of the charge noise. By simulating several different scenarios and noise sources, we show that this is a robust phenomenon generally occurring at large field inhomogeneity. By appropriately adjusting the motion of the quantum dot, we also design realistic protocols enabling faster and more coherent spin shuttling. Our findings are generally applicable to a wide range of setups and could pave the way toward large-scale quantum processors.

References in corpus (51)

• Semiconductor Spin Qubits
• How to Enhance Dephasing Time in Superconducting Qubits
• Computing with spin qubits at the surface code error threshold
• Fast universal quantum control above the fault-tolerance threshold in silicon
• Universal control of a six-qubit quantum processor in silicon
• Prospects for Spin-Based Quantum Computing
• Two-qubit silicon quantum processor with operation fidelity exceeding 99%
• Spin decoherence of a heavy hole coupled to nuclear spins in a quantum dot
• Quantum error correction with silicon spin qubits
• Coherent spin-spin coupling mediated by virtual microwave photons
• Strong coupling between a photon and a hole spin in silicon
• Input-output theory for spin-photon coupling in Si double quantum dots
• Conveyor-mode single-electron shuttling in Si/SiGe for a scalable quantum computing architecture
• A single hole spin with enhanced coherence in natural silicon
• Strong Long-Range Spin-Spin Coupling via a Kerr Magnon Interface
• Hole spin qubits in Si FinFETs with fully tunable spin-orbit coupling and sweet spots for charge noise
• Hybridization and spin decoherence in heavy-hole quantum dots
• Blueprint of a scalable spin qubit shuttle device for coherent mid-range qubit transfer in disordered Si/SiGe/SiO${}_2$
• Dynamics of hole singlet triplet qubits with large g-factor differences
• Enhanced Convergence and Robust Performance of Randomized Dynamical Decoupling
• Sweet-spot operation of a germanium hole spin qubit with highly anisotropic noise sensitivity
• Mesoscopic one-way channels for quantum state transfer via the Quantum Hall Effect
• Bell-state generation for spin qubits via dissipative coupling
• Hole spin driving by strain-induced spin-orbit interactions
• Shuttling an electron spin through a silicon quantum dot array
• Controlling quantum systems by embedded dynamical decoupling schemes
• Spin-EPR-pair separation by conveyor-mode single electron shuttling in Si/SiGe
• A natural heavy-hole flopping mode qubit in germanium
• Hole Spin Qubits in Ge Nanowire Quantum Dots: Interplay of Orbital Magnetic Field, Strain, and Growth Direction
• First-principles hyperfine tensors for electrons and holes in GaAs and silicon
• Quantum Computation Protocol for Dressed Spins in a Global Field
• Hole spin manipulation in inhomogeneous and non-separable electric fields
• Low disorder and high valley splitting in silicon
• Hotter is easier: unexpected temperature dependence of spin qubit frequencies
• Implementation of the SMART protocol for global qubit control in silicon
• Tunable hole spin-photon interaction based on g-matrix modulation
• Quantum control of hole spin qubits in double quantum dots
• Electrical operation of planar Ge hole spin qubits in an in-plane magnetic field
• Ultrafast and Electrically Tunable Rabi Frequency in a Germanium Hut Wire Hole Spin Qubit
• Stamping single wall nanotubes for circuit quantum electrodynamics
• Quantum computing on magnetic racetracks with flying domain wall qubits
• Long-range entanglement for spin qubits via quantum Hall edge modes
• Hole spin qubits in thin curved quantum wells
• Bounds to electron spin qubit variability for scalable CMOS architectures
• Enhanced orbital magnetic field effects in Ge hole nanowires
• Linear-in-momentum spin orbit interactions in planar Ge/GeSi heterostructures and spin qubits
• Phase driving hole spin qubits
• Bichromatic Rabi Control of Semiconductor Qubits
• Transmission lines and resonators based on quantum Hall plasmonics: electromagnetic field, attenuation and coupling to qubits
• Light-Hole Gate-Defined Spin-Orbit Qubit
• Modular nanomagnet design for spin qubits confined in a linear chain

Cited by in corpus (15)

• Coherent spin qubit shuttling through germanium quantum dots
• Strategies for enhancing spin-shuttling fidelities in Si/SiGe quantum wells with random-alloy disorder
• Towards early fault tolerance on a 2$\times$N array of qubits equipped with shuttling
• Single-step high-fidelity three-qubit gates by anisotropic chiral interactions
• Dephasing of planar Ge hole spin qubits due to 1/$\text{f}$ charge noise
• Partial Landau-Zener transitions and applications to qubit shuttling
• A spinless spin qubit
• Topological Spin Textures Enabling Quantum Transmission
• Electrical Interconnects for Silicon Spin Qubits
• Decoherence and fidelity enhancement during shuttling of entangled spin qubits
• Micromagnet-free operation of electron spin qubits in Si/Si${}_{1-x}$Ge${}_x$ vertical double quantum dots
• Spin qubit shuttling between coupled quantum dots with inhomogeneous Landé g-tensors
• Sweet-spot protection of hole spins in sparse arrays via spin-dependent magnetotunneling
• Robust applicability of continuous dynamical decoupling to decoherence reduction in longitudinal and transverse-noise settings: The role of anisotropy
• Robust Tripartite Entanglement Generation via Correlated Noise in Spin Qubits