Exchange-controlled single-electron-spin rotations in quantum dots

Abstract

We show theoretically that arbitrary coherent rotations can be performed quickly (with a gating time ~1 ns) and with high fidelity on the spin of a single confined electron using control of exchange only, without the need for spin-orbit coupling or ac fields. We expect that implementations of this scheme would achieve gate error rates on the order of η~ 10^{-3} in GaAs quantum dots, within reach of several known error-correction protocols

4+ pages, 3 figures; v2: Streamlined presentation, final version published in PRB (Rapid Comm.)

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Cited by in corpus (25)

• Prospects for Spin-Based Quantum Computing
• Universal quantum control of two-electron spin quantum bits using dynamic nuclear polarization
• Nuclear Spins in Nanostructures
• The impact of classical control electronics on qubit fidelity
• Efficient C-Phase gate for single-spin qubits in quantum dots
• Vortices in quantum droplets: Analogies between boson and fermion systems
• Long-time electron spin storage via dynamical suppression of hyperfine-induced decoherence in a quantum dot
• Transport through quantum-dot spin valves containing magnetic impurities
• Nuclear spin dynamics and Zeno effect in quantum dots and defect centers
• Ultrasensitive mechanical detection of magnetic moment using a commercial disk drive write head
• Spin rotations induced by electron running on closed trajectories in gated semiconductor nanodevices
• Spin-polarized currents in double and triple quantum dots driven by ac magnetic fields
• Spin-orbit coupling and anisotropic exchange in two-electron double quantum dots
• Spin bottleneck in resonant tunneling through double quantum dots with different Zeeman splittings
• Single-spin manipulation in a double quantum dot in the field of a micromagnet
• Induced quantum dots and wires: electron storage and delivery
• Gate control of a quantum dot single-electron spin in realistic confining potentials: anisotropy effects
• Ultrafast manipulation of electron spins in a double quantum dot device: A real-time view
• Bichromatic Rabi Control of Semiconductor Qubits
• Entanglement generation via a completely mixed nuclear spin bath
• High Fidelity Singlet-Triplet $S$-$T_{-}$ Qubits in Inhomogeneous Magnetic Fields
• Hamiltonian engineering for robust quantum state transfer and qubit readout in cavity QED
• Optical rotation of heavy hole spins by non-Abelian geometrical means
• Modelling the effect of charge noise on the exchange interaction between spins
• Spin-orbit signatures in the dynamics of singlet-triplet qubits in double quantum dots