A single hole spin with enhanced coherence in natural silicon

Abstract

Semiconductor spin qubits based on spin-orbit states are responsive to electric field excitation allowing for practical, fast and potentially scalable qubit control. Spin-electric susceptibility, however, renders these qubits generally vulnerable to electrical noise, which limits their coherence time. Here we report on a spin-orbit qubit consisting of a single hole electrostatically confined in a natural silicon metal-oxide-semiconductor device. By varying the magnetic field orientation, we reveal the existence of operation sweet spots where the impact of charge noise is minimized while preserving an efficient electric-dipole spin control. We correspondingly observe an extension of the Hahn-echo coherence time up to 88 $\mu$s, exceeding by an order of magnitude the best reported values for hole-spin qubits, and approaching the state-of-the-art for electron spin qubits with synthetic spin-orbit coupling in isotopically-purified silicon. This finding largely enhances the prospects of silicon-based hole spin qubits for scalable quantum information processing.

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Cited by in corpus (54)

• Semiconductor Spin Qubits
• Strong coupling between a photon and a hole spin in silicon
• Simultaneous single-qubit driving of semiconductor spin qubits at the fault-tolerant threshold
• Recent advances in hole-spin qubits
• Sweet-spot operation of a germanium hole spin qubit with highly anisotropic noise sensitivity
• Hole spin driving by strain-induced spin-orbit interactions
• Two-qubit logic with anisotropic exchange in a fin field-effect transistor
• Orbital angular momentum of Bloch electrons: equilibrium formulation, magneto-electric phenomena, and the orbital Hall effect
• Hole spin manipulation in inhomogeneous and non-separable electric fields
• Tunable hole spin-photon interaction based on g-matrix modulation
• Probing resonating valence bonds on a programmable germanium quantum simulator
• Electrical operation of planar Ge hole spin qubits in an in-plane magnetic field
• Impact of interface traps on charge noise, mobility and percolation density in Ge/SiGe heterostructures
• A singlet-triplet hole-spin qubit in MOS silicon
• Hole spin qubits in thin curved quantum wells
• Charge-noise induced dephasing in silicon hole-spin qubits
• 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
• Geometry of the dephasing sweet spots of spin-orbit qubits
• Classification and magic magnetic-field directions for spin-orbit-coupled double quantum dots
• The Quantum House Of Cards
• Determination of spin-orbit interaction in semiconductor nanostructures via non-linear transport
• Electrical operation of hole spin qubits in planar MOS silicon quantum dots
• Compromise-Free Scaling of Qubit Speed and Coherence
• Modelling of spin decoherence in a Si hole qubit perturbed by a single charge fluctuator
• Cryogenic hyperabrupt strontium titanate varactors for sensitive reflectometry of quantum dots
• Valley-Free Silicon Fins Caused by Shear Strain
• A two-dimensional 10-qubit array in germanium with robust and localised qubit control
• Non-reciprocal Pauli Spin Blockade in a Silicon Double Quantum Dot
• Combining n-MOS Charge Sensing with p-MOS Silicon Hole Double Quantum Dots in a CMOS platform
• Dephasing of planar Ge hole spin qubits due to 1/$\text{f}$ charge noise
• Modelling of planar germanium hole qubits in electric and magnetic fields
• Effects of spin-orbit coupling and in-plane Zeeman fields on the critical current in two-dimensional hole gas SNS junctions
• Optimal operation of hole spin qubits
• Quantum estimation and remote charge sensing with a hole-spin qubit in silicon
• Leveraging Off-the-Shelf Silicon Chips for Quantum Computing
• A spinless spin qubit
• All-electrical operation of a spin qubit coupled to a high-Q resonator
• Longitudinal coupling between electrically driven spin-qubits and a resonator
• Quantification of the heavy-hole--light-hole mixing in two-dimensional hole gases
• Polarimetry With Spins in the Solid State
• Electron Charge Sensor with Hole Current Operating at Cryogenic Temperature
• A dressed singlet-triplet qubit in germanium
• Electrical readout of spins in the absence of spin blockade
• Variability of hole spin qubits in planar Germanium
• Effect of disorder and strain on the operation of planar Ge hole spin qubits
• Dressed basis sets for the modeling of exchange interactions in double quantum dots
• Commercial CMOS Process for Quantum Computing: Quantum Dots and Charge Sensing in a 22 nm Fully Depleted Silicon-on-Insulator Process
• Giant Rabi frequencies between qubit and excited hole states in silicon quantum dots
• Low-Temperature Electron Transport in [110] and [100] Silicon Nanowires: A DFT - Monte Carlo study
• Micromagnet-free operation of electron spin qubits in Si/Si${}_{1-x}$Ge${}_x$ vertical double quantum dots
• Switchable spin-photon coupling with hole spins in single-quantum dots
• Sweet-spot protection of hole spins in sparse arrays via spin-dependent magnetotunneling