{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:URIGB4J3AYSFTTIGGT6N7E7E2Z","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"95fe2209e01e156f5184da77788f4fc5510bf21f16c9b0729586a00d1025f98a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2023-06-30T12:23:52Z","title_canon_sha256":"ee4462c4b4d268690a1e2e22ea3f3ad81d83f3b0f5fc1122d41b7ab81b3c1962"},"schema_version":"1.0","source":{"id":"2306.17603","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2306.17603","created_at":"2026-07-05T07:35:19Z"},{"alias_kind":"arxiv_version","alias_value":"2306.17603v1","created_at":"2026-07-05T07:35:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2306.17603","created_at":"2026-07-05T07:35:19Z"},{"alias_kind":"pith_short_12","alias_value":"URIGB4J3AYSF","created_at":"2026-07-05T07:35:19Z"},{"alias_kind":"pith_short_16","alias_value":"URIGB4J3AYSFTTIG","created_at":"2026-07-05T07:35:19Z"},{"alias_kind":"pith_short_8","alias_value":"URIGB4J3","created_at":"2026-07-05T07:35:19Z"}],"graph_snapshots":[{"event_id":"sha256:a5a50dff0683747bc6c8fc1bad6b884f96f4a3abeacc9cf89f58b42fbca662ff","target":"graph","created_at":"2026-07-05T07:35:19Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2306.17603/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Precise synchronization between transmitter and receiver is crucial for quantum communication protocols, such as Quantum Key Distribution (QKD), to efficiently correlate the transmitted and received signals and increase the signal-to-noise ratio. In this work, we introduce a synchronization technique that exploits a co-propagating classical optical communication link and test its performance in a free-space QKD system. Previously, existing techniques required additional laser beams or relied on the capability of retrieving the synchronization from the quantum signal itself, though this is not ","authors_text":"Andrea Stanco, Costantino Agnesi, Daniel Matter, Federico Berra, Giuseppe Vallone, Marco Avesani, Michal Kuklewski, Paolo Villoresi","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2023-06-30T12:23:52Z","title":"Synchronization of quantum communication over an optical classical communication channel"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2306.17603","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:2def6ac59a1cb802fe9d70e226289ee65ca2d356da719db2c97079fd96bf4be6","target":"record","created_at":"2026-07-05T07:35:19Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"95fe2209e01e156f5184da77788f4fc5510bf21f16c9b0729586a00d1025f98a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2023-06-30T12:23:52Z","title_canon_sha256":"ee4462c4b4d268690a1e2e22ea3f3ad81d83f3b0f5fc1122d41b7ab81b3c1962"},"schema_version":"1.0","source":{"id":"2306.17603","kind":"arxiv","version":1}},"canonical_sha256":"a45060f13b062459cd0634fcdf93e4d670d8601136c6af3c6f978976cd74199f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a45060f13b062459cd0634fcdf93e4d670d8601136c6af3c6f978976cd74199f","first_computed_at":"2026-07-05T07:35:19.695267Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T07:35:19.695267Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"JEAuZRIBEjpWdKANpkRjzjIcRwCxDXcE2irwxsGjDN5jgT2WWLFonshRONHqnnixqyLgVfKIc/Chv6E9HRTgAA==","signature_status":"signed_v1","signed_at":"2026-07-05T07:35:19.695715Z","signed_message":"canonical_sha256_bytes"},"source_id":"2306.17603","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2def6ac59a1cb802fe9d70e226289ee65ca2d356da719db2c97079fd96bf4be6","sha256:a5a50dff0683747bc6c8fc1bad6b884f96f4a3abeacc9cf89f58b42fbca662ff"],"state_sha256":"0cdbcc30ec37ca74ee51d39adf61bbb7ca440d78f29b2f8c89468e172d23962d"}