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.)

References in corpus (7)

• Single-shot read-out of an individual electron spin in a quantum dot
• Driven coherent oscillations of a single electron spin in a quantum dot
• Spin qubits in graphene quantum dots
• Hyperfine interaction in a quantum dot: Non-Markovian electron spin dynamics
• Orbital mechanisms of electron spin manipulation by an electric field
• Singlet-triplet decoherence due to nuclear spins in a double quantum dot
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Cited by in corpus (5)

• Nuclear Spins in Nanostructures
• Long-time electron spin storage via dynamical suppression of hyperfine-induced decoherence in a quantum dot
• Nuclear spin dynamics and Zeno effect in quantum dots and defect centers
• Spin rotations induced by electron running on closed trajectories in gated semiconductor nanodevices
• Entanglement generation via a completely mixed nuclear spin bath