Hyperfine interactions in silicon quantum dots

Abstract

We present an all-electron calculation of the hyperfine parameters for conduction electrons in Si, showing that: (i) all parameters scale linearly with the spin density at a ${}^{29}$Si site; (ii) the isotropic term is over 30 times larger than the anisotropic part; (iii) conduction electron charge density at a Si nucleus is consistent with experimental estimates; (iv) Overhauser fields in natural Si quantum dots (QDs) are two orders of magnitude smaller than in GaAs QDs. This reinforces the outstanding performance of Si in keeping spin coherence and opens access to reliable quantitative information aiming at spintronic applications.

5 pages, 3 figures, 1 table. Published version

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Cited by in corpus (76)

• Silicon Quantum Electronics
• Semiconductor Spin Qubits
• Electrical control of a long-lived spin qubit in a Si/SiGe quantum dot
• A hole spin qubit in a fin field-effect transistor above 4 kelvin
• Two-axis control of a singlet-triplet qubit with an integrated micromagnet
• Strong coupling of a spin qubit to a superconducting stripline cavity
• Low-frequency spin qubit detuning noise in highly purified ${}^{28}$Si/SiGe
• Pauli Spin Blockade in a Highly Tunable Silicon Double Quantum Dot
• Probing low noise at the MOS interface with a spin-orbit qubit
• Electron spin resonance and spin-valley physics in a silicon double quantum dot
• Pauli Spin Blockade of Heavy Holes in a Silicon Double Quantum Dot
• Single-shot measurement of triplet-singlet relaxation in a Si/SiGe double quantum dot
• A silicon quantum-dot-coupled nuclear spin qubit
• Pulse-gated quantum dot hybrid qubit
• Spin relaxation in a Si quantum dot due to spin-valley mixing
• Blueprint of a scalable spin qubit shuttle device for coherent mid-range qubit transfer in disordered Si/SiGe/SiO${}_2$
• Single-spin qubits in isotopically enriched silicon at low magnetic field
• Single-Spin Relaxation in a Synthetic Spin-Orbit Field
• Multivalley effective mass theory simulation of donors in silicon
• Spin-orbit Interactions for Singlet-Triplet Qubits in Silicon
• Hyperfine Stark effect of shallow donors in silicon
• A silicon singlet-triplet qubit driven by spin-valley coupling
• Controllable exchange coupling between two singlet-triplet qubits
• First-principles hyperfine tensors for electrons and holes in GaAs and silicon
• Two-Qubit Couplings of Singlet-Triplet Qubits Mediated by One Quantum State
• Spatial noise correlations beyond nearest-neighbor in ${}^{28}$Si/SiGe spin qubits
• High-fidelity gates in quantum dot spin qubits
• Few electron double quantum dot in an isotopically purified ${}^{28}$Si quantum well
• Gate-Tunable Spin-Orbit Coupling in a Germanium Hole Double Quantum Dot
• Electromagnetic control of valley splitting in ideal and disordered Si quantum dots
• Interplay of charge noise and coupling to phonons in adiabatic electron transfer between quantum dots
• Characterizing gate operations near the sweet spot of an exchange-only qubit
• Adiabatic electron charge transfer between two quantum dots in presence of 1/f noise
• A singlet-triplet hole-spin qubit in MOS silicon
• Exchange coupling between silicon donors: the crucial role of the central cell and mass anisotropy
• Magnetic Gradient Fluctuations from Quadrupolar ${}^{73}$Ge in Si/SiGe Exchange-Only Qubits
• Do micromagnets expose spin qubits to charge and Johnson noise?
• Hyperfine interaction induced dephasing of coupled spin qubits in semiconductor double quantum dots
• Two-Qubit Pulse Gate for the Three-Electron Double Quantum Dot Qubit
• Switching between relaxation hotspots and coldspots in disordered spin qubits
• Theory of Spin Relaxation in Two-Electron Lateral Coupled Si/SiGe Quantum Dots
• Interface and electromagnetic effects in the valley splitting of Si quantum dots
• Donor hyperfine Stark shift and the role of central-cell corrections in tight-binding theory
• Spin decoherence in graphene quantum dots due to hyperfine interaction
• Coherent electrical rotations of valley states in Si quantum dots using the phase of the valley-orbit coupling
• High Fidelity Singlet-Triplet $S$-$T_{-}$ Qubits in Inhomogeneous Magnetic Fields
• SiGe/Si quantum dot electron spin decoherence dependence on ${}^{73}$Ge
• Spin-orbit enhancement in Si/SiGe heterostructures with oscillating Ge concentration
• Multi-valley envelope function equations and effective potentials for P impurity in silicon
• Phonon-assisted relaxation and decoherence of singlet-triplet qubits in Si/SiGe quantum dots
• Pauli spin blockade in CMOS double quantum dot devices
• Electrical operation of hole spin qubits in planar MOS silicon quantum dots
• Inverted Singlet-Triplet Qubit Coded on a Two-Electron Double Quantum Dot
• Atomistic compositional details and their importance for spin qubits in isotope-purified silicon-germanium quantum wells
• Enhanced hyperfine-induced spin dephasing in a magnetic-field gradient
• Theory of box-model hyperfine couplings and transport signatures of long-range nuclear-spin coherence in a quantum-dot spin valve
• Valley splitting depending on the size and location of a silicon quantum dot
• Simple operation sequences to couple and interchange quantum information between spin qubits of different kinds
• Theory of single and two-qubit operations with donor-bound electron spins in germanium
• Effects of charge noise on a pulse-gated singlet-triplet $S-T_{-}$ qubit
• Flopping-mode electron dipole spin resonance in the strong-driving regime
• Flying Spin Qubits in Quantum Dot Arrays Driven by Spin-Orbit Interaction
• Quadrupole Shift of Nuclear Magnetic Resonance of Donors in Silicon at Low Magnetic Field
• Hyperfine-induced dephasing in three-electron spin qubits
• Controlled-NOT gate sequences for mixed spin qubit architectures in a noisy environment
• Coherent transfer of singlet-triplet qubit states in an architecture of triple quantum dots
• The origins of noise in the Zeeman splitting of spin qubits in natural-silicon devices
• Optimisation of electrically-driven multi-donor quantum dot qubits
• Dephasing by a Continuous-Time Random Walk Process
• The formation of a nuclear-spin dark state in silicon
• Noise suppression and long-range exchange coupling for gallium arsenide spin qubits
• Electrical Interconnects for Silicon Spin Qubits
• Singlet-triplet minus mixing and relaxation lifetimes in a double donor dot
• Entangling nuclear spins in distant quantum dots via an electron bus
• Concatenated continuous driving of silicon qubit by amplitude and phase modulation
• Coupling a ${}^{73}$Ge nuclear spin to an electrostatically defined quantum dot