{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2017:BMPATSDB5NWVS5LTQDWG47DNUZ","short_pith_number":"pith:BMPATSDB","schema_version":"1.0","canonical_sha256":"0b1e09c861eb6d59757380ec6e7c6da647846af88b532a2d68ae07c9cfe2c8e8","source":{"kind":"arxiv","id":"1707.04425","version":2},"attestation_state":"computed","paper":{"title":"Modulator-free coherent-one-way quantum key distribution","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Andrew J. Shields, George L. Roberts, James F. Dynes, Marco Lucamarini, Seb J. Savory, Zhiliang Yuan","submitted_at":"2017-07-14T09:12:16Z","abstract_excerpt":"Time-bin encoding is an attractive method for transmitting photonic qubits over long distances with minimal decoherence. It allows a simple receiver for quantum key distribution (QKD) that extracts a key by measuring time of arrival of photons and detects eavesdropping by measuring interference of pulses in different time bins. In the past, coherent pulses have been generated using a CW laser and an intensity modulator. A greatly simplified transmitter is proposed and demonstrated here that works by directly modulating the laser diode. Coherence between pulses is maintained by a weak seed lase"},"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":"1707.04425","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2017-07-14T09:12:16Z","cross_cats_sorted":[],"title_canon_sha256":"72e9d5d7797f56876101411903c65e3aa832edb9f213c5e24914a88a60ccfb0e","abstract_canon_sha256":"9d31b08e9a610b324cb798cce745afacb13d3aa5988fe9d3e0a00dec963025ac"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:40:02.748766Z","signature_b64":"H5Ho0KP+I0J8Vx9VHxGkC0egwO84FGQyxP/+DhIK9NR7VTED7SdJCN+Pn/mqQbLVqxo5HjxmkaAH1/K3N9jnAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0b1e09c861eb6d59757380ec6e7c6da647846af88b532a2d68ae07c9cfe2c8e8","last_reissued_at":"2026-05-18T00:40:02.748053Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:40:02.748053Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Modulator-free coherent-one-way quantum key distribution","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Andrew J. Shields, George L. Roberts, James F. Dynes, Marco Lucamarini, Seb J. Savory, Zhiliang Yuan","submitted_at":"2017-07-14T09:12:16Z","abstract_excerpt":"Time-bin encoding is an attractive method for transmitting photonic qubits over long distances with minimal decoherence. It allows a simple receiver for quantum key distribution (QKD) that extracts a key by measuring time of arrival of photons and detects eavesdropping by measuring interference of pulses in different time bins. In the past, coherent pulses have been generated using a CW laser and an intensity modulator. A greatly simplified transmitter is proposed and demonstrated here that works by directly modulating the laser diode. Coherence between pulses is maintained by a weak seed lase"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1707.04425","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":"1707.04425","created_at":"2026-05-18T00:40:02.748169+00:00"},{"alias_kind":"arxiv_version","alias_value":"1707.04425v2","created_at":"2026-05-18T00:40:02.748169+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1707.04425","created_at":"2026-05-18T00:40:02.748169+00:00"},{"alias_kind":"pith_short_12","alias_value":"BMPATSDB5NWV","created_at":"2026-05-18T12:31:08.081275+00:00"},{"alias_kind":"pith_short_16","alias_value":"BMPATSDB5NWVS5LT","created_at":"2026-05-18T12:31:08.081275+00:00"},{"alias_kind":"pith_short_8","alias_value":"BMPATSDB","created_at":"2026-05-18T12:31:08.081275+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/BMPATSDB5NWVS5LTQDWG47DNUZ","json":"https://pith.science/pith/BMPATSDB5NWVS5LTQDWG47DNUZ.json","graph_json":"https://pith.science/api/pith-number/BMPATSDB5NWVS5LTQDWG47DNUZ/graph.json","events_json":"https://pith.science/api/pith-number/BMPATSDB5NWVS5LTQDWG47DNUZ/events.json","paper":"https://pith.science/paper/BMPATSDB"},"agent_actions":{"view_html":"https://pith.science/pith/BMPATSDB5NWVS5LTQDWG47DNUZ","download_json":"https://pith.science/pith/BMPATSDB5NWVS5LTQDWG47DNUZ.json","view_paper":"https://pith.science/paper/BMPATSDB","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1707.04425&json=true","fetch_graph":"https://pith.science/api/pith-number/BMPATSDB5NWVS5LTQDWG47DNUZ/graph.json","fetch_events":"https://pith.science/api/pith-number/BMPATSDB5NWVS5LTQDWG47DNUZ/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/BMPATSDB5NWVS5LTQDWG47DNUZ/action/timestamp_anchor","attest_storage":"https://pith.science/pith/BMPATSDB5NWVS5LTQDWG47DNUZ/action/storage_attestation","attest_author":"https://pith.science/pith/BMPATSDB5NWVS5LTQDWG47DNUZ/action/author_attestation","sign_citation":"https://pith.science/pith/BMPATSDB5NWVS5LTQDWG47DNUZ/action/citation_signature","submit_replication":"https://pith.science/pith/BMPATSDB5NWVS5LTQDWG47DNUZ/action/replication_record"}},"created_at":"2026-05-18T00:40:02.748169+00:00","updated_at":"2026-05-18T00:40:02.748169+00:00"}