%0 Journal Article %T Indistinguishable photons from a trapped-ion quantum network node %+ Institut fur Quantenoptik und Quanteninformation (IQOQI) %+ Leopold Franzens Universität Innsbruck - University of Innsbruck %+ Université de Bâle = University of Basel (Unibas) %+ Institut de Physique Théorique - UMR CNRS 3681 (IPHT) %A Meraner, M %A Mazloom, A %A Krutyanskiy, V %A Krcmarsky, V %A Schupp, J %A Fioretto, D., A. %A Sekatski, P. %A Northup, T., E. %A Sangouard, N. %A Lanyon, B., P. %< avec comité de lecture %Z t19/169 %@ 1050-2947 %J Physical Review A : Atomic, molecular, and optical physics [1990-2015] %I American Physical Society %V 102 %P 052614 %8 2020 %D 2020 %Z 1912.09259 %R 10.1103/PhysRevA.102.052614 %Z Physics [physics]Journal articles %X 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. %G English %2 https://cea.hal.science/cea-02438271v2/document %2 https://cea.hal.science/cea-02438271v2/file/MER1.pdf %L cea-02438271 %U https://cea.hal.science/cea-02438271 %~ CEA %~ CNRS %~ OPENAIRE %~ DSM-IPHT %~ DSV %~ CEA-UPSAY %~ UNIV-PARIS-SACLAY %~ CEA-DRF %~ UNIVERSITE-PARIS-SACLAY %~ GS-MATHEMATIQUES %~ GS-PHYSIQUE