{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:73CHTRBUJ7CS22NKNWBFLDBMFA","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":"8ee19dd9b14edc19c51653067d0227d74fd9ff3f20eeadaa1cf8de70b964e97d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-02-09T07:39:08Z","title_canon_sha256":"eb87861a69e8aed3c1d9af249f7a02d0c62c06ea0a82851e9db31b75a5a863dd"},"schema_version":"1.0","source":{"id":"1902.03385","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1902.03385","created_at":"2026-05-17T23:43:03Z"},{"alias_kind":"arxiv_version","alias_value":"1902.03385v1","created_at":"2026-05-17T23:43:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1902.03385","created_at":"2026-05-17T23:43:03Z"},{"alias_kind":"pith_short_12","alias_value":"73CHTRBUJ7CS","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_16","alias_value":"73CHTRBUJ7CS22NK","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_8","alias_value":"73CHTRBU","created_at":"2026-05-18T12:33:10Z"}],"graph_snapshots":[{"event_id":"sha256:505831808c96cc7d2557c5670cb542066507cb9c05fd6d10ce74f01ea666cb49","target":"graph","created_at":"2026-05-17T23:43:03Z","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"},"paper":{"abstract_excerpt":"Quantum key distribution (QKD) offers a secret way to share keys between legitimate users which is guaranteed by the law of quantum mechanics. Most recently, the limitation of transmission distance without quantum repeaters was broken through by twin-field QKD [Nature (London) 557, 400 (2018)]. Based on its main idea, sending or not-sending (SNS) QKD protocol was proposed [Phys. Rev. A 98, 062323 (2018)], which filled the remaining security loopholes and can tolerate large misalignment errors. In this paper, we give a more general model for SNS QKD, where the two legitimate users, Alice and Bo","authors_text":"Chunhui Zhang, Chunmei Zhang, Qin Wang, Xingyu Zhou","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-02-09T07:39:08Z","title":"Asymmetric sending or not-sending twin-field quantum key distribution in practice"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.03385","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:c4db3d50204b54fe89f442021ea145eaa62c92c5beaf9fe207e529f555654a57","target":"record","created_at":"2026-05-17T23:43:03Z","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":"8ee19dd9b14edc19c51653067d0227d74fd9ff3f20eeadaa1cf8de70b964e97d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-02-09T07:39:08Z","title_canon_sha256":"eb87861a69e8aed3c1d9af249f7a02d0c62c06ea0a82851e9db31b75a5a863dd"},"schema_version":"1.0","source":{"id":"1902.03385","kind":"arxiv","version":1}},"canonical_sha256":"fec479c4344fc52d69aa6d82558c2c283c78aba68144ee40cdce5c582a4ff34c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fec479c4344fc52d69aa6d82558c2c283c78aba68144ee40cdce5c582a4ff34c","first_computed_at":"2026-05-17T23:43:03.465065Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:43:03.465065Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"0OWWoMneAxdjKdmwc6Ulmxzn5FcKm3Fz+IGzrRyLJy2I03TfLEZyq++agc3WoLS0JnGEwOcwLJZwBnn/umaiBw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:43:03.465614Z","signed_message":"canonical_sha256_bytes"},"source_id":"1902.03385","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c4db3d50204b54fe89f442021ea145eaa62c92c5beaf9fe207e529f555654a57","sha256:505831808c96cc7d2557c5670cb542066507cb9c05fd6d10ce74f01ea666cb49"],"state_sha256":"913d0ff8de428ab39e0df417321fe899647cadefc2732697c4e028ae6d63d3c2"}