High-capacity spatial multimode quantum memories based on atomic ensembles

We study spatial multimode quantum memories based on light storage in extended ensembles of Λ-type atoms. We show that such quantum light-matter interfaces allow for highly efficient storage of many spatial modes. In particular, forward operating memories possess excellent scaling with the important...

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Bibliographic Details
Published in:Physical review letters 2012-09, Vol.109 (13), p.133601-133601, Article 133601
Main Authors: Grodecka-Grad, Anna, Zeuthen, Emil, Sørensen, Anders S
Format: Article
Language:English
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Summary:We study spatial multimode quantum memories based on light storage in extended ensembles of Λ-type atoms. We show that such quantum light-matter interfaces allow for highly efficient storage of many spatial modes. In particular, forward operating memories possess excellent scaling with the important physical parameters: quadratic scaling with the Fresnel number and even cubic with the optical depth of the atomic ensemble. Thus, the simultaneous use of both the longitudinal and transverse shape of the stored spin wave modes constitutes a valuable and so far overlooked resource for multimode quantum memories.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.109.133601