Ultrafast Hole Spin Qubit with Gate-Tunable Spin-Orbit Switch

Abstract

A key challenge in quantum computation is the implementation of fast and local qubit control while simultaneously maintaining coherence. Qubits based on hole spins offer, through their strong spin-orbit interaction, a way to implement fast quantum gates. Strikingly, for hole spins in one-dimensional germanium and silicon devices, the spin-orbit interaction has been predicted to be exceptionally strong yet highly tunable with gate voltages. Such electrical control would make it possible to switch on demand between qubit idling and manipulation modes. Here, we demonstrate ultrafast and universal quantum control of a hole spin qubit in a germanium/silicon core/shell nanowire, with Rabi frequencies of several hundreds of megahertz, corresponding to spin-flipping times as short as ~1 ns - a new record for a single-spin qubit. Next, we show a large degree of electrical control over the Rabi frequency, Zeeman energy, and coherence time - thus implementing a switch toggling from a rapid qubit manipulation mode to a more coherent idling mode. We identify an exceptionally strong but gate-tunable spin-orbit interaction as the underlying mechanism, with a short associated spin-orbit length that can be tuned over a large range down to 3 nm for holes of heavy-hole mass. Our work demonstrates a spin-orbit qubit switch and establishes hole spin qubits defined in one-dimensional germanium/silicon nanostructures as a fast and highly tunable platform for quantum computation.

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Cited by in corpus (105)

• Semiconductor Spin Qubits
• Review of performance metrics of spin qubits in gated semiconducting nanostructures
• A singlet triplet hole spin qubit in planar Ge
• Ultrafast coherent control of a hole spin qubit in a germanium quantum dot
• Nanomaterials for Quantum Information Science and Engineering
• A single hole spin with enhanced coherence in natural silicon
• Hole spin qubits in Si FinFETs with fully tunable spin-orbit coupling and sweet spots for charge noise
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• Recent advances in hole-spin qubits
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• On-demand electrical control of spin qubits
• Hole spin driving by strain-induced spin-orbit interactions
• Electrical control of the $g$-tensor of a single hole in a silicon MOS quantum dot
• In-situ Tuning of the Electric Dipole Strength of a Double Dot Charge Qubit: Charge Noise Protection and Ultra Strong Coupling
• Silicon quantum dot devices with a self-aligned second gate layer
• Fully tunable longitudinal spin-photon interactions in Si and Ge quantum dots
• Lightly-strained germanium quantum wells with hole mobility exceeding one million
• A natural heavy-hole flopping mode qubit in germanium
• Two-qubit logic with anisotropic exchange in a fin field-effect transistor
• Hole Spin Qubits in Ge Nanowire Quantum Dots: Interplay of Orbital Magnetic Field, Strain, and Growth Direction
• Gate-Controlled Quantum Dots Based on Two-Dimensional Materials
• Hole spin manipulation in inhomogeneous and non-separable electric fields
• Anisotropic g-Factor and Spin-Orbit Field in a Ge Hut Wire Double Quantum Dot
• Gate-Tunable Spin-Orbit Coupling in a Germanium Hole Double Quantum Dot
• A gate tunable transmon qubit in planar Ge
• Quantum control of hole spin qubits in double quantum dots
• Ultrafast and Electrically Tunable Rabi Frequency in a Germanium Hut Wire Hole Spin Qubit
• Quantum computing on magnetic racetracks with flying domain wall qubits
• Impact of interface traps on charge noise, mobility and percolation density in Ge/SiGe heterostructures
• All-electrical control of hole singlet-triplet spin qubits at low leakage points
• A singlet-triplet hole-spin qubit in MOS silicon
• Hole spin qubits in thin curved quantum wells
• Planar Josephson junctions in germanium: Effect of cubic spin-orbit interaction
• High-fidelity two-qubit gates of hybrid superconducting-semiconducting singlet-triplet qubits
• Strong hole-photon coupling in planar Ge for probing charge degree and strongly-correlated states
• Charge-noise induced dephasing in silicon hole-spin qubits
• Coupled superconducting spin qubits with spin-orbit interaction
• Thermal entanglement and quantum coherence of a single electron in a double quantum dot with Rashba Interaction
• Enhanced orbital magnetic field effects in Ge hole nanowires
• Linear-in-momentum spin orbit interactions in planar Ge/GeSi heterostructures and spin qubits
• High-fidelity spin qubit shuttling via large spin-orbit interaction
• Phase driving hole spin qubits
• Majorana zero modes in gate-defined germanium hole nanowires
• Geometry of the dephasing sweet spots of spin-orbit qubits
• Majorana bound states in germanium Josephson junctions via phase control
• Classification and magic magnetic-field directions for spin-orbit-coupled double quantum dots
• Codesign of quantum error-correcting codes and modular chiplets in the presence of defects
• Electrical control of the hole spin qubit in Si and Ge nanowire quantum dots
• Electrical operation of hole spin qubits in planar MOS silicon quantum dots
• Spin and Orbital Spectroscopy in the Absence of Coulomb Blockade in Lead Telluride Nanowire Quantum Dots
• Determination of spin-orbit interaction in semiconductor nanostructures via non-linear transport
• Anisotropic $g$-tensors in hole quantum dots: The role of the transverse confinement direction
• Cryogenic hyperabrupt strontium titanate varactors for sensitive reflectometry of quantum dots
• Microscopic analysis of proximity-induced superconductivity and metallization effects in superconductor-germanium hole nanowires
• Coupling of hole double quantum dot in planar germanium to a microwave cavity
• Valleytronic full configuration-interaction approach: An application to the excitation spectra of Si double-dot qubits
• Cross-architecture Tuning of Silicon and SiGe-based Quantum Devices Using Machine Learning
• Combining n-MOS Charge Sensing with p-MOS Silicon Hole Double Quantum Dots in a CMOS platform
• Low-energy subband wave-functions and effective $g$-factor of one-dimensional hole gas
• Clock model and parafermions in Rashba nanowires
• Charge-sensing of a Ge/Si core/shell nanowire double quantum dot using a high-impedance superconducting resonator
• Fully autonomous tuning of a spin qubit
• Line Shapes of Electric Dipole Spin Resonance in Pauli Spin Blockade
• Dephasing of planar Ge hole spin qubits due to 1/$\text{f}$ charge noise
• All-optical noise spectroscopy of a solid-state spin
• Spin-Orbit Interaction Enabled High-Fidelity Two-Qubit Gates
• Performance of high impedance resonators in dirty dielectric environments
• Acceptor-based qubit in silicon with tunable strain
• Effects of spin-orbit coupling and in-plane Zeeman fields on the critical current in two-dimensional hole gas SNS junctions
• Probing details of spin--orbit coupling through Pauli spin blockade
• Isotropic and Anisotropic g-factor Corrections in GaAs Quantum Dots
• Magnetoelectric torque and edge currents caused by spin-orbit coupling
• Low-energy hole subband dispersions in a cylindrical Ge nanowire: the effects of the nanowire growth direction
• Quantum estimation and remote charge sensing with a hole-spin qubit in silicon
• Optimal operation of hole spin qubits
• A spinless spin qubit
• Two-band description of the strong `spin'-orbit coupled one-dimensional hole gas in a cylindrical Ge nanowire
• Scalable and Tunable In-Plane Ge/Si(001) Nanowires Grown by Molecular Beam Epitaxy
• Control of a qubit state by a soliton propagating through a Heisenberg spin chain
• Electrical manipulation of a hole `spin'-orbit qubit in nanowire quantum dot: the nontrivial magnetic field effects
• All-electrical operation of a spin qubit coupled to a high-Q resonator
• Protecting coherence from the environment via Stark many-body localization in a Quantum-Dot Simulator
• Theory of superconducting proximity effect in hole-based hybrid semiconductor-superconductor devices
• Multi-qubit DC gates over an inhomogeneous array of quantum dots
• Electron Charge Sensor with Hole Current Operating at Cryogenic Temperature
• Electrical readout of spins in the absence of spin blockade
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• Hole subband dispersions in a cylindrical Ge nanowire: exact results based on the axial Luttinger-Kohn Hamiltonian
• Hole subband dispersions and strong `spin'-orbit coupling in a cylindrical Ge nanowire
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• Supercurrent and multiple Andreev reflections in Ge hut nanowire Josephson Junctions
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• Searching strong `spin'-orbit coupled one-dimensional hole gas in strong magnetic fields
• Anomalous zero-field splitting for hole spin qubits in Si and Ge quantum dots
• Fully tunable hyperfine interactions of hole spin qubits in Si and Ge quantum dots
• Dynamical nuclear spin polarization in a quantum dot with an electron spin driven by electric dipole spin resonance