Towards a realistic model for cavity-enhanced atomic frequency comb quantum memories

Author:

Taherizadegan ShahrzadORCID,Davidson Jacob HORCID,Kumar Sourabh,Oblak DanielORCID,Simon Christoph

Abstract

Abstract Atomic frequency comb (AFC) quantum memory is a favorable protocol in long distance quantum communication. Putting the AFC inside an asymmetric optical cavity enhances the storage efficiency but makes the measurement of the comb properties challenging. We develop a theoretical model for cavity-enhanced AFC quantum memory that includes the effects of dispersion, and show a close alignment of the model with our own experimental results. Providing semi-quantitative agreement for estimating the efficiency and a good description of how the efficiency changes as a function of detuning, it also captures certain qualitative features of the experimental reflectivity. For comparison, we show that a theoretical model without dispersion fails dramatically to predict the correct efficiencies. Our model is a step forward to accurately estimating the created comb properties, such as the optical depth inside the cavity, and so being able to make precise predictions of the performance of the prepared cavity-enhanced AFC quantum memory.

Funder

Alberta Innovates

Alberta Major Innovation Fund

High-Throughput Secure Networks (HTSN) Program of the National Research Council

Natural Sciences and Engineering Research Council

Canada Foundation for Innovation

Publisher

IOP Publishing

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