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Proceedings Paper

Classical and quantum information processing with EIT
Author(s): Raymond G. Beausoleil; Sean D. Barrett; Pieter Kok; Kae Nemoto; William J. Munro; Timothy P. Spiller
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Paper Abstract

We review our work on electromagnetically induced transparency (EIT) as a potentially key enabling science for few-qubit Quantum Information Technology (QIT). EIT systems capable of providing two-qubit phase shifts as large as pi are possible in a condensed matter system such as NV-diamond, but the potentially large residual absorption necessarily arising under this condition significantly reduces the fidelity of a nonlinear optical gate based on EIT. Instead, we emphasize that a universal set of quantum gates can be constructed using EIT systems that provide cumulative phase shifts (and residual absorptions) that are much smaller than unity. We describe a single-photon quantum nondemolition detector and a two-photon parity gate as basic elements of a nonlinear optical quantum information processing system.

Paper Details

Date Published: 4 April 2005
PDF: 12 pages
Proc. SPIE 5735, Advanced Optical and Quantum Memories and Computing II, (4 April 2005); doi: 10.1117/12.601718
Show Author Affiliations
Raymond G. Beausoleil, Hewlett-Packard Labs. (United Kingdom)
Sean D. Barrett, Hewlett-Packard Labs. (United Kingdom)
Pieter Kok, Hewlett-Packard Labs. (United Kingdom)
Kae Nemoto, National Institute of Informatics (Japan)
William J. Munro, Hewlett-Packard Labs. (United Kingdom)
Timothy P. Spiller, Hewlett-Packard Labs. (United Kingdom)

Published in SPIE Proceedings Vol. 5735:
Advanced Optical and Quantum Memories and Computing II
Hans J. Coufal; Zameer U. Hasan; Alan E. Craig, Editor(s)

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