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Indistinguishable photons from a trapped-ion quantum network node

Abstract : Trapped atomic ions embedded in optical cavities are a promising platform to enable long-distance quantum networks and their most far-reaching applications. Here we achieve and analyze photon in-distinguishability in a telecom-converted ion-cavity system. First, two-photon interference of cavity photons at their ion-resonant wavelength is observed and found to reach the limits set by spontaneous emission. Second, this limit is shown to be preserved after a two-step frequency conversion replicating a distributed scenario, in which the cavity photons are converted to the telecom C band and then back to the original wavelength. The achieved interference visibility and photon efficiency would allow for the distribution and practical verification of entanglement between ion-qubit registers separated by several tens of kilometers.
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Contributor : Bruno Savelli Connect in order to contact the contributor
Submitted on : Monday, October 17, 2022 - 2:24:36 PM
Last modification on : Wednesday, October 19, 2022 - 3:55:40 AM


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M Meraner, A Mazloom, V Krutyanskiy, V Krcmarsky, J Schupp, et al.. Indistinguishable photons from a trapped-ion quantum network node. Physical Review A : Atomic, molecular, and optical physics, 2020, 102, pp.052614. ⟨10.1103/PhysRevA.102.052614⟩. ⟨cea-02438271v2⟩



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