Classical and quantum information processing with EIT

R. G. Beausoleil; S. D. Barrett; P. Kok; K. Nemoto; W. J. Munro; T. P. Spiller

doi:10.1117/12.601718

Classical and quantum information processing with EIT

R. G. Beausoleil^*, S. D. Barrett, P. Kok, K. Nemoto, W. J. Munro, T. P. Spiller

^*Corresponding author for this work

Physics

Research output: Contribution to journal › Article › peer-review

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 π 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 non-linear optical quantum information processing system.

Original language	English
Pages (from-to)	143-154
Number of pages	12
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	5735
DOIs	https://doi.org/10.1117/12.601718
Publication status	Published - 4 Apr 2005

Keywords

EIT
Nonlinear optics
Quantum information processing

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10.1117/12.601718

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keywords = "EIT, Nonlinear optics, Quantum information processing",

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AU - Beausoleil, R. G.

AU - Barrett, S. D.

AU - Kok, P.

AU - Nemoto, K.

AU - Munro, W. J.

AU - Spiller, T. P.

PY - 2005/4/4

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AB - 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 π 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 non-linear optical quantum information processing system.

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Classical and quantum information processing with EIT

Abstract

Keywords

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