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

2006/10/31 by W. A. Coish, Daniel Loss · 3 citations
Engineering · Physics and Astronomy · #Advancements in Semiconductor Devices and Circuit Design #Quantum and electron transport phenomena #Semiconductor materials and devices #cond-mat.mes-hall

paper · pdf · doi:10.1103/physrevb.75.161302

published as Phys. Rev. B 75, 161302(R) (2007) · 4+ pages, 3 figures; v2: Streamlined presentation, final version published in PRB (Rapid Comm.)

openalex publication_date 2007/04/20 · arxiv created 2007/04/23 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We show theoretically that arbitrary coherent rotations can be performed quickly (with a gating time \ensuremath∼1\phantom\rule0.3em0exns) 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 \ensuremathη\ensuremath\lesssim10^\ensuremath-3 in GaAs quantum dots, within reach of several known error-correction protocols.

Citations

• Singlet-triplet decoherence due to nuclear spins in a double quantum dot
• Orbital Mechanisms of Electron-Spin Manipulation by an Electric Field
• One-Spin Quantum Logic Gates from Exchange Interactions and a Global Magnetic Field
• Coherent Manipulation of Coupled Electron Spins in Semiconductor Quantum Dots
• Single-shot read-out of an individual electron spin in a quantum dot
• Fidelity of single qubit maps

Cited by

• Long-time electron spin storage via dynamical suppression of hyperfine-induced decoherence in a quantum dot
• Ultrafast manipulation of electron spins in a double quantum dot device: A real-time numerical and analytical study
• Induced Quantum Dots and Wires: Electron Storage and Delivery