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Single- and double-click high-rate entanglement generation between distant ions using multiplexed atomic ensembles

Benedikt Tissot1,*, Soubhadra Maiti2,3, Emil R. Hellebek1, and Anders Søndberg Sørensen1,†

  • *Contact author: benedikt.tissot@nbi.ku.dk
  • †Contact author: anders.sorensen@nbi.ku.dk
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Phys. Rev. Research 8, 033067 – Published 16 July, 2026

DOI: https://doi.org/10.1103/27kc-fxpw

Abstract

In an accompanying paper [B. Tissot et al., Phys. Rev. A 114, L010602 (2026)], we introduced an approach to interface trapped-ion quantum processors with ensemble-based quantum memories by matching a spontaneous parametric down-conversion source to both the ions and the memories. This enables rapid entanglement generation between single trapped ions separated by distances of hundreds of kilometers. In this article, we extend the protocol and provide additional details of the analysis. Particularly, we compare double-click and single-click approaches for the ion edge nodes. The double-click approach relaxes the phase stability requirement but is strongly affected by finite efficiencies. Choosing the optimal protocol thus depends on the access to the phase stabilization as well as the efficiencies of the interfaces of the ions and ensemble-based memories.

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Hybrid single-ion atomic-ensemble node for high-rate remote entanglement generation

Benedikt Tissot, Soubhadra Maiti, Emil R. Hellebek, and Anders Søndberg Sørensen
Phys. Rev. A 114, L010602 (2026)

Article Text

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Phys. Rev. Research 8, 033067– Published 16 July, 2026
  • Received 17 November 2025
  • Accepted 15 May 2026
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

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