Photodriven germanium hole qubit
arXiv:2401.10570 · doi:10.1103/PhysRevB.109.155419
Abstract
Hole qubits in germanium quantum dots are promising candidates for coherent control and manipulation of the spin degree of freedom through electric dipole spin resonance. We theoretically study the time dynamics of a single heavy-hole qubit in a laser-driven planar germanium quantum dot confined laterally by a harmonic potential in presence of linear and cubic Rashba spin-orbit couplings and an out-of-plane magnetic field. We obtain an approximate analytical formula of the Rabi frequency using a Schrieffer-Wolff transformation and establish a connection of our model with the ESDR results obtained for this system. For stronger beams, we employ different methods such as unitary transformation and Floquet theory to study the time evolution numerically. We observe that high radiation intensity is not suitable for the qubit rotation due to the presence of high frequency noise superimposed on the Rabi oscillations. We display the Floquet spectrum and highlight the quasienergy levels responsible for the Rabi oscillations in the Floquet picture. We study the interplay of both the types of Rashba couplings and show that the Rabi oscillations, which are brought about by the linear Rashba coupling, vanish for typical values of the cubic Rashba coupling in this system.
References in corpus (57)
- Surface codes: Towards practical large-scale quantum computation
- Driven coherent oscillations of a single electron spin in a quantum dot
- Coherent control of a single electron spin with electric fields
- An addressable quantum dot qubit with fault-tolerant control fidelity
- A Two Qubit Logic Gate in Silicon
- A >99.9%-fidelity quantum-dot spin qubit with coherence limited by charge noise
- A single-atom electron spin qubit in silicon
- Electron spin decoherence in quantum dots due to interaction with nuclei
- Semiconductor Spin Qubits
- Electron spin coherence exceeding seconds in high purity silicon
- Spin-orbit qubit in a semiconductor nanowire
- Electrically driven single electron spin resonance in a slanting Zeeman field
- Quantum CNOT Gate for Spins in Silicon
- Spin-flip transitions between Zeeman sublevels in semiconductor quantum dots
- Phonon-induced decay of the electron spin in quantum dots
- Hyperfine interaction in a quantum dot: Non-Markovian electron spin dynamics
- The germanium quantum information route
- Electric Dipole Induced Spin Resonance in Quantum Dots
- Orbital mechanisms of electron spin manipulation by an electric field
- Semiconductor Qubits In Practice
- Spin decoherence of a heavy hole coupled to nuclear spins in a quantum dot
- 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
- Ge hole spin qubit
- Two-qubit Gate of Combined Single Spin Rotation and Inter-dot Spin Exchange in a Double Quantum Dot
- Spin-echo of a single electron spin in a quantum dot
- A single-hole spin qubit
- Semiconductor Quantum Computation
- Electric Dipole Spin Resonance for Heavy Holes in Quantum Dots
- Hyperfine-mediated transitions between a Zeeman split doublet in GaAs quantum dots: The role of the internal field
- Spin relaxation and anticrossing in quantum dots: Rashba versus Dresselhaus spin-orbit coupling
- Cubic Rashba spin-orbit interaction of two-dimensional hole gas in strained-Ge/SiGe quantum well
- 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
- Spin-orbit interactions in inversion-asymmetric 2D hole systems: a variational analysis
- Isotope sensitive measurement of the hole-nuclear spin interaction in quantum dots
- 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
- Recent advances in hole-spin qubits
- Genetic Design of Enhanced Valley Splitting towards a Spin Qubit in Silicon
- Hole spin driving by strain-induced spin-orbit interactions
- Spin Decay in a Quantum Dot Coupled to a Quantum Point Contact
- Supercoupling between heavy-hole and light-hole states in self-assembled quantum dots
- Hole spin manipulation in inhomogeneous and non-separable electric fields
- Anisotropy of spin splitting and spin relaxation in lateral quantum dots
- Emergence of the strong tunable linear Rashba spin-orbit coupling of two-dimensional hole gases in semiconductor quantum
- Electric-field Manipulation of the Lande' g Tensor of Holes in In0.5Ga0.5As/GaAs Self-assembled Quantum Dots
- Electrical operation of planar Ge hole spin qubits in an in-plane magnetic field
- Single spin resonance driven by electric modulation of the g factor anisotropy
- Electric Dipole Spin Resonance of 2D Semiconductor Spin Qubits
- Linear-in-momentum spin orbit interactions in planar Ge/GeSi heterostructures and spin qubits
- The emergent linear Rashba spin-orbit coupling offering the fast manipulation of hole-spin qubits in germanium
- Hyperfine coupling of hole and nuclear spins in symmetric GaAs quantum dots
- Photo-assisted spin transport in double quantum dots with spin-orbit interaction