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Trapped Ion Quantum Computing

Electromagnetically induced transparency and four-wave mixing in a cold atomic ensemble with large optical depth

arXiv
Authors: J. Geng, G. T. Campbell, J. Bernu, D. Higginbottom, B. M. Sparkes, S. M. Assad, W. P. Zhang, N. P. Robins, P. K. Lam, B. C. Buchler

Year

2014

Paper ID

48125

Status

Preprint

Abstract Read

~2 min

Abstract Words

102

Citations

N/A

Abstract

We report on the delay of optical pulses using electromagnetically induced transparency in an ensemble of cold atoms with an optical depth exceeding 500. To identify the regimes in which four-wave mixing impacts on EIT behaviour, we conduct the experiment in both rubidium 85 and rubidium 87. Comparison with theory shows excellent agreement in both isotopes. In rubidium 87, negligible four-wave mixing was observed and we obtained one pulse-width of delay with 50% efficiency. In rubidium 85, four-wave-mixing contributes to the output. In this regime we achieve a delay-bandwidth product of 3.7 at 50% efficiency, allowing temporally multimode delay, which we demonstrate by compressing two pulses into the memory medium.

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  • This paper contributes to the Trapped-Ion Quantum Computing research area in the Quantum Articles archive.
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  • We report on the delay of optical pulses using electromagnetically induced transparency in an ensemble of cold atoms with an optical depth exceeding 500.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1408.2316 [2] arXiv https://arxiv.org/abs/1408.2316 [3] Publisher https://arxiv.org/abs/1408.2316

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