Indistinguishable photons from a trapped-ion quantum network node
| Autor: | Meraner, M., Mazloom, A., Krutyanskiy, V., Krcmarsky, V., Schupp, J., Fioretto, D., Sekatski, P., Northup, T. E., Sangouard, N., Lanyon, B. P. |
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| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | Phys. Rev. A 102, 052614 (2020) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevA.102.052614 |
| Popis: | 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 indistinguishability 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. Comment: Main text: 4 pages with 3 figures. Supplementary material: 11 pages with 5 figure |
| Databáze: | arXiv |
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