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Journal Articles Physical Review A : Atomic, molecular, and optical physics [1990-2015] Year : 2020

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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Dates and versions

cea-02438271 , version 1 (01-04-2020)
cea-02438271 , version 2 (17-10-2022)

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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 [1990-2015], 2020, 102, pp.052614. ⟨10.1103/PhysRevA.102.052614⟩. ⟨cea-02438271v2⟩
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