Nanophotonic quantum network node with neutral atoms and an integrated telecom interface

Journal Article (2020)
Author(s)

Shankar G. Menon (University of Chicago)

Kevin Singh (University of Chicago)

Johannes Borregaard (University of Copenhagen, Kavli institute of nanoscience Delft, TU Delft - QN/Borregaard groep)

Hannes Bernien (University of Chicago)

Research Group
QN/Borregaard groep
Copyright
© 2020 Shankar G. Menon, Kevin Singh, J. Borregaard, Hannes Bernien
DOI related publication
https://doi.org/10.1088/1367-2630/ab98d4
More Info
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Publication Year
2020
Language
English
Copyright
© 2020 Shankar G. Menon, Kevin Singh, J. Borregaard, Hannes Bernien
Research Group
QN/Borregaard groep
Issue number
7
Volume number
22
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Abstract

The realization of a long-distance, distributed quantum network based on quantum memory nodes that are linked by photonic channels remains an outstanding challenge. We propose a quantum network node based on neutral alkali atoms coupled to nanophotonic crystal cavities that combines a long-lived memory qubit with a photonic interface at the telecom range, thereby enabling the long-distance distribution of entanglement over low loss optical fibers. We present a novel protocol for the generation of an atom-photon entangled state which uses telecom transitions between excited states of the alkali atoms. We analyze the realistic implementation of this protocol using rubidium and cesium atoms taking into account the full atomic level structure and properties of the nanophotonic crystal cavity. We find that a high fidelity entangled state can be generated with current technologies.