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.

46 pages, 5 figures

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• Electrically driven single electron spin resonance in a slanting Zeeman field
• One-Dimensional Hole Gas in Germanium/Silicon Nanowire Heterostructures
• Universal control of a six-qubit quantum processor in silicon
• Deterministic Generation of a Cluster State of Entangled Photons
• A photonic cluster state machine gun
• Two-qubit silicon quantum processor with operation fidelity exceeding 99%
• Spin decoherence of a heavy hole coupled to nuclear spins in a quantum dot
• Spin relaxation and decoherence of holes in quantum dots
• Spin dynamics in InAs-nanowire quantum-dots coupled to a transmission line
• Electric Dipole Spin Resonance for Heavy Holes in Quantum Dots
• Nuclear Spins in Nanostructures
• Strong and Tunable Spin-Orbit Coupling of One-Dimensional Holes in Ge/Si Core/Shell Nanowires
• Strong coupling between a photon and a hole spin in silicon
• A single hole spin with enhanced coherence in natural silicon
• Direct measurement of the hole-nuclear spin interaction in single quantum dots
• Heavy hole states in Germanium hut wires
• Hole spin qubits in Si FinFETs with fully tunable spin-orbit coupling and sweet spots for charge noise
• Scalable qubit architecture based on holes in quantum dot molecules
• On the nature of tunable hole g-factors in quantum dots
• Tunable g factor and phonon-mediated hole spin relaxation in Ge/Si nanowire quantum dots
• Anisotropic Pauli Spin Blockade of Holes in a GaAs Double Quantum Dot
• Fully tunable longitudinal spin-photon interactions in Si and Ge quantum dots
• Lightly-strained germanium quantum wells with hole mobility exceeding one million
• First-principles hyperfine tensors for electrons and holes in GaAs and silicon
• Electrically-tunable hole g-factor of an optically-active quantum dot for fast spin rotations
• Fabrication and characterisation of ambipolar devices on an undoped AlGaAs/GaAs heterostructure
• Probing resonating valence bonds on a programmable germanium quantum simulator
• Gate-Tunable Spin-Orbit Coupling in a Germanium Hole Double Quantum Dot
• Spin-echo dynamics of a heavy hole in a quantum dot
• Pauli Blockade in a Few-Hole PMOS Double Quantum Dot limited by Spin-Orbit Interaction
• Characterization of spin-orbit interactions of GaAs heavy holes using a quantum point contact
• Interface-induced heavy-hole/light-hole splitting of acceptors in silicon
• Fast Hole Tunneling Times in Germanium Hut Wires Probed by Single-Shot Reflectometry
• Pseudospin-electric coupling for holes beyond the envelope-function approximation
• Quantum dot molecule devices with optical control of charge status and electronic control of coupling
• A deterministic source of indistinguishable photons in a cluster state

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