{"paper":{"title":"113 km Free-Space Time-Frequency Dissemination at the 19th Decimal Instability","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.optics"],"primary_cat":"physics.ins-det","authors_text":"Chao-Yang Lu, Cheng-Zhi Peng, Dan-Yang Zhu, Fa-Xi Chen, Ge-Sheng Pan, Hai-Feng Jiang, Jian-Jun Jia, Jian-Wei Pan, Jian-Yu Guan, Ji-Gang Ren, Jin-Cai Wu, Jin-Jian Han, Juan Yin, Lei Hou, Meng-Zhe Lian, Min Li, Qiang Zhang, Qi Shen, Shao-mao Wang, Sheng-Kai Liao, Ting Zeng, Wei-Yue Liu, Xin-Xin Peng, Xi-Ping Shi, Yan-Wei Chen, Yan-yan Zhang, Ye Li, Yong Wang, Yuan Cao, Zhao-Hui Li, Zheng-Guo Wang","submitted_at":"2022-03-22T04:02:52Z","abstract_excerpt":"Optical clock networks play important roles in various fields, such as precise navigation, redefinition of \"second\" unit, and gravitational tests. To establish a global-scale optical clock network, it is essential to disseminate time and frequency with a stability of $10^{-19}$ over a long-distance free-space link. However, such attempts were limited to dozens of kilometers in mirror-folded configuration. Here, we take a crucial step toward future satellite-based time-frequency disseminations. By developing the key technologies, including high-power frequency combs, high-stability and high-eff"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2203.11272","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2203.11272/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}