Recent advances in hole-spin qubits

Abstract

In recent years, hole-spin qubits based on semiconductor quantum dots have advanced at a rapid pace. We first review the main potential advantages of these hole-spin qubits with respect to their electron-spin counterparts, and give a general theoretical framework describing them. The basic features of spin-orbit coupling and hyperfine interaction in the valence band are discussed, together with consequences on coherence and spin manipulation. In the second part of the article we provide a survey of experimental realizations, which spans a relatively broad spectrum of devices based on GaAs, Si, or Si/Ge heterostructures. We conclude with a brief outlook.

arXiv comment46 pages, 5 figures

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Cited by in corpus (38)

• 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
• Electrical operation of planar Ge hole spin qubits in an in-plane magnetic field
• Linear-in-momentum spin orbit interactions in planar Ge/GeSi heterostructures and spin qubits
• Geometry of the dephasing sweet spots of spin-orbit qubits
• Phase driving hole spin qubits
• Electrical operation of hole spin qubits in planar MOS silicon quantum dots
• Compromise-Free Scaling of Qubit Speed and Coherence
• Cryogenic hyperabrupt strontium titanate varactors for sensitive reflectometry of quantum dots
• Coupling of hole double quantum dot in planar germanium to a microwave cavity
• Single-step high-fidelity three-qubit gates by anisotropic chiral interactions
• Flying Spin Qubits in Quantum Dot Arrays Driven by Spin-Orbit Interaction
• Dephasing of planar Ge hole spin qubits due to 1/$\text{f}$ charge noise
• A photonic which-path entangler based on longitudinal cavity-qubit coupling
• A spinless spin qubit
• Optimal operation of hole spin qubits
• Leveraging Off-the-Shelf Silicon Chips for Quantum Computing
• Light-hole spin confined in germanium
• Toward Axion Signal Extraction in Semiconductor Spin Qubits Via Spectral Engineering
• All-electrical operation of a spin qubit coupled to a high-Q resonator
• Longitudinal coupling between electrically driven spin-qubits and a resonator
• Superconducting Proximity Effect in Two-Dimensional Hole Gases
• Quantification of the heavy-hole--light-hole mixing in two-dimensional hole gases
• Multi-qubit DC gates over an inhomogeneous array of quantum dots
• Effect of disorder and strain on the operation of planar Ge hole spin qubits
• Cancelling second order frequency shifts in Ge hole spin qubits via bichromatic control
• Hole spin splitting in a Ge quantum dot with finite barriers
• Photodriven germanium hole qubit
• Role of anisotropic confining potential and elliptical driving in dynamics of a Ge hole qubit
• Dressed basis sets for the modeling of exchange interactions in double quantum dots
• Limitations of the $g$-tensor formalism of semiconductor spin qubits
• Giant Rabi frequencies between qubit and excited hole states in silicon quantum dots
• Switchable spin-photon coupling with hole spins in single-quantum dots
• Dynamical nuclear spin polarization in a quantum dot with an electron spin driven by electric dipole spin resonance
• Sweet-spot protection of hole spins in sparse arrays via spin-dependent magnetotunneling
• Ge as an orbitronic platform: giant in-plane orbital magneto-electric effect in a 2-dimensional hole gas
• Orbital Hall effect in spin-3/2 hole-doped semiconductors and its implications for orbitronics
• Strained Donor-Bound Excitons in ${}^{28}$Si