{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2011:62DQKWNVHQUVWO3VVCIRAXREXN","short_pith_number":"pith:62DQKWNV","schema_version":"1.0","canonical_sha256":"f6870559b53c295b3b75a891105e24bb4b78d76a5b26680d3cfca93da9cfd7b8","source":{"kind":"arxiv","id":"1109.2519","version":2},"attestation_state":"computed","paper":{"title":"Quantum entanglement distribution with 810 nm photons through active telecommunication fibers","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Catherine Holloway, Chris Erven, Evan Meyer-Scott, Thomas Jennewein","submitted_at":"2011-09-12T16:08:33Z","abstract_excerpt":"We demonstrate the distribution of polarization-entangled photons for the purpose of quantum key distribution (QKD) along active telecom fibers. Entangled photon pairs of 810 nm wavelength generated by a Sagnac interferometer source were coupled into standard telecom single mode fibers. The fibers were either dark or carrying a standardized 1550 nm ethernet signals (1000BASE-ZX) with a nominal speed of 1 GBps from regular media converter devices, without any requirements on the optical power or spectrum transmitted. Our system demonstrates a QKD network covering 6 km in distance with a central"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1109.2519","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-09-12T16:08:33Z","cross_cats_sorted":[],"title_canon_sha256":"f80544bfc6da4d35a61f58757a5d9c73a65a20279607bd194efea04ede9bed1e","abstract_canon_sha256":"1dc40c176d1a56127fabf165cf4e235a0f0fde6da09e011f1c31b91bd56dea3a"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:41:18.738537Z","signature_b64":"QDf8dIF/+VCv15MoNbVd1dr5zV2T1X4/kqTp88MiikQ1jNFCzolU5ot1g1jTao1LWgLXRqQTZfKMF46QbuL9Bw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f6870559b53c295b3b75a891105e24bb4b78d76a5b26680d3cfca93da9cfd7b8","last_reissued_at":"2026-05-18T00:41:18.737851Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:41:18.737851Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Quantum entanglement distribution with 810 nm photons through active telecommunication fibers","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Catherine Holloway, Chris Erven, Evan Meyer-Scott, Thomas Jennewein","submitted_at":"2011-09-12T16:08:33Z","abstract_excerpt":"We demonstrate the distribution of polarization-entangled photons for the purpose of quantum key distribution (QKD) along active telecom fibers. Entangled photon pairs of 810 nm wavelength generated by a Sagnac interferometer source were coupled into standard telecom single mode fibers. The fibers were either dark or carrying a standardized 1550 nm ethernet signals (1000BASE-ZX) with a nominal speed of 1 GBps from regular media converter devices, without any requirements on the optical power or spectrum transmitted. Our system demonstrates a QKD network covering 6 km in distance with a central"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1109.2519","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1109.2519","created_at":"2026-05-18T00:41:18.737955+00:00"},{"alias_kind":"arxiv_version","alias_value":"1109.2519v2","created_at":"2026-05-18T00:41:18.737955+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1109.2519","created_at":"2026-05-18T00:41:18.737955+00:00"},{"alias_kind":"pith_short_12","alias_value":"62DQKWNVHQUV","created_at":"2026-05-18T12:26:22.705136+00:00"},{"alias_kind":"pith_short_16","alias_value":"62DQKWNVHQUVWO3V","created_at":"2026-05-18T12:26:22.705136+00:00"},{"alias_kind":"pith_short_8","alias_value":"62DQKWNV","created_at":"2026-05-18T12:26:22.705136+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/62DQKWNVHQUVWO3VVCIRAXREXN","json":"https://pith.science/pith/62DQKWNVHQUVWO3VVCIRAXREXN.json","graph_json":"https://pith.science/api/pith-number/62DQKWNVHQUVWO3VVCIRAXREXN/graph.json","events_json":"https://pith.science/api/pith-number/62DQKWNVHQUVWO3VVCIRAXREXN/events.json","paper":"https://pith.science/paper/62DQKWNV"},"agent_actions":{"view_html":"https://pith.science/pith/62DQKWNVHQUVWO3VVCIRAXREXN","download_json":"https://pith.science/pith/62DQKWNVHQUVWO3VVCIRAXREXN.json","view_paper":"https://pith.science/paper/62DQKWNV","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1109.2519&json=true","fetch_graph":"https://pith.science/api/pith-number/62DQKWNVHQUVWO3VVCIRAXREXN/graph.json","fetch_events":"https://pith.science/api/pith-number/62DQKWNVHQUVWO3VVCIRAXREXN/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/62DQKWNVHQUVWO3VVCIRAXREXN/action/timestamp_anchor","attest_storage":"https://pith.science/pith/62DQKWNVHQUVWO3VVCIRAXREXN/action/storage_attestation","attest_author":"https://pith.science/pith/62DQKWNVHQUVWO3VVCIRAXREXN/action/author_attestation","sign_citation":"https://pith.science/pith/62DQKWNVHQUVWO3VVCIRAXREXN/action/citation_signature","submit_replication":"https://pith.science/pith/62DQKWNVHQUVWO3VVCIRAXREXN/action/replication_record"}},"created_at":"2026-05-18T00:41:18.737955+00:00","updated_at":"2026-05-18T00:41:18.737955+00:00"}