The emergent linear Rashba spin-orbit coupling offering the fast manipulation of hole-spin qubits in germanium
arXiv:2106.14684 · doi:10.1103/PhysRevB.105.075313
Abstract
The electric dipole spin resonance (EDSR) combining strong spin-orbit coupling (SOC) and electric-dipole transitions facilitates fast spin control in a scalable way, which is the critical aspect of the rapid progress made recently in germanium (Ge) hole-spin qubits. However, a puzzle is raised because centrosymmetric Ge lacks the Dresselhaus SOC, a key element in the initial proposal of the hole-based EDSR. Here, we demonstrate that the recently uncovered finite k-linear Rashba SOC of 2D holes offers fast hole spin control via EDSR with Rabi frequencies in excellent agreement with experimental results over a wide range of driving fields. We also suggest that the Rabi frequency can reach 500 MHz under a higher gate electric field or multiple GHz in a replacement by [110]oriented wells. These findings bring a deeper understanding for hole-spin qubit manipulation and offer design principles to boost the gate speed.
arXiv comment11 pages, 3 figures
References in corpus (36)
- Driven coherent oscillations of a single electron spin in a quantum dot
- A Two Qubit Logic Gate in Silicon
- Electron spin coherence exceeding seconds in high purity silicon
- Quantum CNOT Gate for Spins in Silicon
- A four-qubit germanium quantum processor
- Electric Dipole Induced Spin Resonance in Quantum Dots
- Spin relaxation and decoherence of holes in quantum dots
- Fast two-qubit logic with holes in germanium
- Rashba spin splitting in two-dimensional electron and hole systems
- Strong Spin-Orbit Interaction and Helical Hole States in Ge/Si Nanowires
- A single-hole spin qubit
- Electric Dipole Spin Resonance for Heavy Holes in Quantum Dots
- Electrical spin driving by -matrix modulation in spin-orbit qubits
- Low disordered, stable, and shallow germanium quantum wells: a playground for spin and hybrid quantum technology
- Cubic Rashba spin-orbit interaction of two-dimensional hole gas in strained-Ge/SiGe quantum well
- Gate-controlled quantum dots and superconductivity in planar germanium
- Ultrafast coherent control of a hole spin qubit in a germanium quantum dot
- Theory of Hole-Spin Qubits in Strained Germanium Quantum Dots
- Spin Splitting in Symmetrical SiGe Quantum Wells
- Optimal operation points for ultrafast, highly coherent Ge hole spin-orbit qubits
- Squeezed hole spin qubits in Ge quantum dots with ultrafast gates at low power
- Spin-orbit interactions in inversion-asymmetric 2D hole systems: a variational analysis
- Spin dynamics in a strongly driven system: very slow Rabi oscillations
- Spin-orbit splitting of valence subbands in semiconductor nanostructures
- Light effective hole mass in undoped Ge/SiGe quantum wells
- Genetic Design of Enhanced Valley Splitting towards a Spin Qubit in Silicon
- Enhancement of Proximity Induced Superconductivity in a Planar Ge Hole Gas
- Spin Decay in a Quantum Dot Coupled to a Quantum Point Contact
- Spin Orbit Mediated Manipulation of Heavy Hole Spin Qubit in Gated Semiconductor Nanodevices
- Prediction of large linear-in-k spin splitting for holes in the 2D GaAs/AlAs system
- A natural heavy-hole flopping mode qubit in germanium
- Supercoupling between heavy-hole and light-hole states in self-assembled quantum dots
- Emergence of the strong tunable linear Rashba spin-orbit coupling of two-dimensional hole gases in semiconductor quantum
- Spin Manipulation and Relaxation in Spin-Orbit Qubits
- All electrically controlled quantum gates for single heavy hole spin qubits
- Strong Transport Anisotropy in a Ge/SiGe Quantum Well in Tilted Magnetic Fields
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- Hole spin driving by strain-induced spin-orbit interactions
- Hole spin manipulation in inhomogeneous and non-separable electric fields
- Quantum control of hole spin qubits in double quantum dots
- Linear-in-momentum spin orbit interactions in planar Ge/GeSi heterostructures and spin qubits
- Flying Spin Qubits in Quantum Dot Arrays Driven by Spin-Orbit Interaction
- Electrical manipulation of a hole `spin'-orbit qubit in nanowire quantum dot: the nontrivial magnetic field effects
- Theory of superconducting proximity effect in hole-based hybrid semiconductor-superconductor devices
- Photodriven germanium hole qubit
- Role of anisotropic confining potential and elliptical driving in dynamics of a Ge hole qubit
- The toric code under antiferromagnetic isotropic Heisenberg interactions