Spin state readout by quantum jump technique: for the purpose of quantum computing

• Published in: IEEE transactions on nanotechnology Vol. 3; no. 1; pp. 10 - 16
• Main Authors: Pazy, E., Calarco, T., Zoller, P.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY IEEE 01.03.2004; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Atom optics; Charge measurement; Classical and quantum physics: mechanics and fields; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Current measurement; Electron optics; Electron states and collective excitations in thin films, multilayers, quantum wells, mesoscopic and nanoscale systems; Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures; Exact sciences and technology; Excitation; Fluorescence; Luminescence; Nanotechnology; Optical pulses; Optical scattering; Physics; Polarized light; Pulse measurements; Quantum computation; Quantum computing; Quantum dots; Quantum information; Single electrons; Fluorescence; Quantum computing; Quantum dots; Spin state; Polarized light; Quantum jump
• ISSN: 1536-125X; 1941-0085
• DOI: 10.1109/TNANO.2003.820516

Utilizing the Pauli-blocking mechanism we show that shining circular polarized light on a singly-charged quantum dot induces spin dependent fluorescence. Employing the quantum-jump technique we demonstrate that this resonance luminescence, due to a spin dependent optical excitation, serves as an excellent readout mechanism for measuring the spin state of a single electron confined to a quantum dot.