{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:COQFECOX4QNQF3P4IG2AQMVQ6D","short_pith_number":"pith:COQFECOX","schema_version":"1.0","canonical_sha256":"13a05209d7e41b02edfc41b40832b0f0c807b68950ceb372c3aa5a038a2c9a22","source":{"kind":"arxiv","id":"1801.06382","version":1},"attestation_state":"computed","paper":{"title":"Four-dimensional entanglement distribution over 100 km","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Hiroki Takesue, Takuya Ikuta","submitted_at":"2018-01-19T12:34:54Z","abstract_excerpt":"High-dimensional quantum entanglement can enrich the functionality of quantum information processing. For example, it can enhance the channel capacity for linear optic superdense coding and decrease the error rate threshold of quantum key distribution. Long-distance distribution of a high-dimensional entanglement is essential for such advanced quantum communications over a communications network. Here, we show a long-distance distribution of a four-dimensional entanglement. We employ time-bin entanglement, which is suitable for a fibre transmission, and implement scalable measurements for the "},"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":"1801.06382","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-01-19T12:34:54Z","cross_cats_sorted":[],"title_canon_sha256":"ca83d14542046e7471aef3e5547a5ef7fa6a928324af1e82379575af74f3a630","abstract_canon_sha256":"35ac12ec0c6024356013dadb56d16e14e48b7a6fd46887a4dbb155bad601e726"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:25:30.305029Z","signature_b64":"rJQLcAjGfc8J7VAyLRHD5HKU7su57k4P9d2/RPbCjTXGSH/eFJaHcW2rD/L/q7AAXGdAP9oQJ9b2tplIFuRpCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"13a05209d7e41b02edfc41b40832b0f0c807b68950ceb372c3aa5a038a2c9a22","last_reissued_at":"2026-05-18T00:25:30.304135Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:25:30.304135Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Four-dimensional entanglement distribution over 100 km","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Hiroki Takesue, Takuya Ikuta","submitted_at":"2018-01-19T12:34:54Z","abstract_excerpt":"High-dimensional quantum entanglement can enrich the functionality of quantum information processing. For example, it can enhance the channel capacity for linear optic superdense coding and decrease the error rate threshold of quantum key distribution. Long-distance distribution of a high-dimensional entanglement is essential for such advanced quantum communications over a communications network. Here, we show a long-distance distribution of a four-dimensional entanglement. We employ time-bin entanglement, which is suitable for a fibre transmission, and implement scalable measurements for the "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.06382","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":""},"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":"1801.06382","created_at":"2026-05-18T00:25:30.304297+00:00"},{"alias_kind":"arxiv_version","alias_value":"1801.06382v1","created_at":"2026-05-18T00:25:30.304297+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.06382","created_at":"2026-05-18T00:25:30.304297+00:00"},{"alias_kind":"pith_short_12","alias_value":"COQFECOX4QNQ","created_at":"2026-05-18T12:32:16.446611+00:00"},{"alias_kind":"pith_short_16","alias_value":"COQFECOX4QNQF3P4","created_at":"2026-05-18T12:32:16.446611+00:00"},{"alias_kind":"pith_short_8","alias_value":"COQFECOX","created_at":"2026-05-18T12:32:16.446611+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/COQFECOX4QNQF3P4IG2AQMVQ6D","json":"https://pith.science/pith/COQFECOX4QNQF3P4IG2AQMVQ6D.json","graph_json":"https://pith.science/api/pith-number/COQFECOX4QNQF3P4IG2AQMVQ6D/graph.json","events_json":"https://pith.science/api/pith-number/COQFECOX4QNQF3P4IG2AQMVQ6D/events.json","paper":"https://pith.science/paper/COQFECOX"},"agent_actions":{"view_html":"https://pith.science/pith/COQFECOX4QNQF3P4IG2AQMVQ6D","download_json":"https://pith.science/pith/COQFECOX4QNQF3P4IG2AQMVQ6D.json","view_paper":"https://pith.science/paper/COQFECOX","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1801.06382&json=true","fetch_graph":"https://pith.science/api/pith-number/COQFECOX4QNQF3P4IG2AQMVQ6D/graph.json","fetch_events":"https://pith.science/api/pith-number/COQFECOX4QNQF3P4IG2AQMVQ6D/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/COQFECOX4QNQF3P4IG2AQMVQ6D/action/timestamp_anchor","attest_storage":"https://pith.science/pith/COQFECOX4QNQF3P4IG2AQMVQ6D/action/storage_attestation","attest_author":"https://pith.science/pith/COQFECOX4QNQF3P4IG2AQMVQ6D/action/author_attestation","sign_citation":"https://pith.science/pith/COQFECOX4QNQF3P4IG2AQMVQ6D/action/citation_signature","submit_replication":"https://pith.science/pith/COQFECOX4QNQF3P4IG2AQMVQ6D/action/replication_record"}},"created_at":"2026-05-18T00:25:30.304297+00:00","updated_at":"2026-05-18T00:25:30.304297+00:00"}