{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:1998:DPY7FDK3FZXLDN2FN4456XZLDS","short_pith_number":"pith:DPY7FDK3","schema_version":"1.0","canonical_sha256":"1bf1f28d5b2e6eb1b7456f39df5f2b1ca654ba04fd63f9df11a540072dc02ac2","source":{"kind":"arxiv","id":"quant-ph/9806043","version":1},"attestation_state":"computed","paper":{"title":"Violation of Bell inequalities by photons more than 10 km apart","license":"","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"H. Zbinden, J. Brendel, N. Gisin, W. Tittel","submitted_at":"1998-06-12T13:36:51Z","abstract_excerpt":"A Franson-type test of Bell inequalities by photons 10.9 km apart is presented. Energy-time entangled photon-pairs are measured using two-channel analyzers, leading to a violation of the inequalities by 16 standard deviations without subtracting accidental coincidences. Subtracting them, a 2-photon interference visibility of 95.5% is observed, demonstrating that distances up to 10 km have no significant effect on entanglement. This sets quantum cryptography with photon pairs as a practical competitor to the schemes based on weak pulses."},"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":"quant-ph/9806043","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"quant-ph","submitted_at":"1998-06-12T13:36:51Z","cross_cats_sorted":[],"title_canon_sha256":"1dca9a7daf716bdbfe6e49f1ad224bd674c4eff1a987aa352e6814a5b02a680b","abstract_canon_sha256":"07bfbb8147081c7c0d40ffb51f6ff23fa4bfd614d775836347711e2c0cfe10d4"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:10:58.946633Z","signature_b64":"GCV9lUp8WcoeXaCLxuxVH36DhuaKdUZPFdtv0TRLtbnWMbDExuH6X43Yi9wgU92LkYfUCds+gUAnYgw8D+NcDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1bf1f28d5b2e6eb1b7456f39df5f2b1ca654ba04fd63f9df11a540072dc02ac2","last_reissued_at":"2026-07-04T16:10:58.946284Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:10:58.946284Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Violation of Bell inequalities by photons more than 10 km apart","license":"","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"H. Zbinden, J. Brendel, N. Gisin, W. Tittel","submitted_at":"1998-06-12T13:36:51Z","abstract_excerpt":"A Franson-type test of Bell inequalities by photons 10.9 km apart is presented. Energy-time entangled photon-pairs are measured using two-channel analyzers, leading to a violation of the inequalities by 16 standard deviations without subtracting accidental coincidences. Subtracting them, a 2-photon interference visibility of 95.5% is observed, demonstrating that distances up to 10 km have no significant effect on entanglement. This sets quantum cryptography with photon pairs as a practical competitor to the schemes based on weak pulses."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"quant-ph/9806043","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/quant-ph/9806043/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"quant-ph/9806043","created_at":"2026-07-04T16:10:58.946345+00:00"},{"alias_kind":"arxiv_version","alias_value":"quant-ph/9806043v1","created_at":"2026-07-04T16:10:58.946345+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.quant-ph/9806043","created_at":"2026-07-04T16:10:58.946345+00:00"},{"alias_kind":"pith_short_12","alias_value":"DPY7FDK3FZXL","created_at":"2026-07-04T16:10:58.946345+00:00"},{"alias_kind":"pith_short_16","alias_value":"DPY7FDK3FZXLDN2F","created_at":"2026-07-04T16:10:58.946345+00:00"},{"alias_kind":"pith_short_8","alias_value":"DPY7FDK3","created_at":"2026-07-04T16:10:58.946345+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":3,"internal_anchor_count":3,"sample":[{"citing_arxiv_id":"2605.24994","citing_title":"Structural constraint on delayed-choice quantum eraser architectures","ref_index":4,"is_internal_anchor":true},{"citing_arxiv_id":"2605.28055","citing_title":"Cavity-Induced Suppression of Entanglement and Enhancement of Quantum Discord","ref_index":5,"is_internal_anchor":true},{"citing_arxiv_id":"2509.07585","citing_title":"Particle Collisions & Quantum Entanglement in High-Energy Collisions","ref_index":21,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/DPY7FDK3FZXLDN2FN4456XZLDS","json":"https://pith.science/pith/DPY7FDK3FZXLDN2FN4456XZLDS.json","graph_json":"https://pith.science/api/pith-number/DPY7FDK3FZXLDN2FN4456XZLDS/graph.json","events_json":"https://pith.science/api/pith-number/DPY7FDK3FZXLDN2FN4456XZLDS/events.json","paper":"https://pith.science/paper/DPY7FDK3"},"agent_actions":{"view_html":"https://pith.science/pith/DPY7FDK3FZXLDN2FN4456XZLDS","download_json":"https://pith.science/pith/DPY7FDK3FZXLDN2FN4456XZLDS.json","view_paper":"https://pith.science/paper/DPY7FDK3","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=quant-ph/9806043&json=true","fetch_graph":"https://pith.science/api/pith-number/DPY7FDK3FZXLDN2FN4456XZLDS/graph.json","fetch_events":"https://pith.science/api/pith-number/DPY7FDK3FZXLDN2FN4456XZLDS/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/DPY7FDK3FZXLDN2FN4456XZLDS/action/timestamp_anchor","attest_storage":"https://pith.science/pith/DPY7FDK3FZXLDN2FN4456XZLDS/action/storage_attestation","attest_author":"https://pith.science/pith/DPY7FDK3FZXLDN2FN4456XZLDS/action/author_attestation","sign_citation":"https://pith.science/pith/DPY7FDK3FZXLDN2FN4456XZLDS/action/citation_signature","submit_replication":"https://pith.science/pith/DPY7FDK3FZXLDN2FN4456XZLDS/action/replication_record"}},"created_at":"2026-07-04T16:10:58.946345+00:00","updated_at":"2026-07-04T16:10:58.946345+00:00"}