Quantum Information Processing Through Quantum Dots in Slow-Light Photonic Crystal Waveguides

Editor(s)

Benisty, H. and Ozbay, E. and Soukoulis, C. M. and Di Falco, A. and Lapine, M. and Tassin, P. and Vanwolleghem, M.

Abstract

We propose a scheme to realize controlled phase-flip gate between two single photons through a single quantum dot (QD) in a slow-light photonic crystal (PhC) waveguide. Enhanced Purcell factor and large β-factor lead to high gate fidelity over broadband frequencies compared to cavity-assisted system. The excellent physical integration of this PhC waveguide system provides tremendous potential for large-scale quantum information processing. Then we generalize to a multi-atom controlled phase-flip gate based on waveguide system in Sagnac interferometer. Through the Sagnac interferometer, the single photon adds the phase-flip operation on the atomic state without changing the photonic state. The controlled phase-flip gate on the atoms can be successfully constructed with high fidelity in one step, even without detecting the photon.

Department(s)

Mechanical and Aerospace Engineering

Keywords and Phrases

Photonic Crystal Waveguides; Quantum Dots; Sagnac Interferometer; Quatum Information Processing

International Standard Serial Number (ISSN)

1569-4410

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2009 Elsevier, All rights reserved.

Publication Date

01 Jan 2009

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