{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:R3JRXOLGYPCL6LCZXQSPXMODUZ","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":"80c31f6c3fd44f9a8c397d756a2127918f49e03f5b6ece013c9621efe7d3f2dd","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-10-11T02:35:35Z","title_canon_sha256":"ef07317bf29b513a28f273cc6d5b21ff8c9167910d68acd5e9f013d4991d6e0c"},"schema_version":"1.0","source":{"id":"1810.04823","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1810.04823","created_at":"2026-05-17T23:47:15Z"},{"alias_kind":"arxiv_version","alias_value":"1810.04823v1","created_at":"2026-05-17T23:47:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1810.04823","created_at":"2026-05-17T23:47:15Z"},{"alias_kind":"pith_short_12","alias_value":"R3JRXOLGYPCL","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_16","alias_value":"R3JRXOLGYPCL6LCZ","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_8","alias_value":"R3JRXOLG","created_at":"2026-05-18T12:32:50Z"}],"graph_snapshots":[{"event_id":"sha256:46a57f933509d6bfb9a17fb29527d6ba5b7b10dbdc13235a3c7a3cb8a7bb64af","target":"graph","created_at":"2026-05-17T23:47:15Z","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":"Entangled photon sources with simultaneously near-unity heralding efficiency and indistinguishability are the fundamental elements for scalable photonic quantum technologies. We design and realize a degenerate entangled-photon source from an ultrafast pulsed laser pumped spontaneous parametric down-conversion (SPDC), which show simultaneously ~97% heralding efficiency and ~96% indistinguishability between independent single photons. Such a high-efficiency and frequency-uncorrelated SPDC source allows generation of the first 12-photon genuine entanglement with a state fidelity of 0.572(24). We ","authors_text":"Chao-Yang Lu, Han-Sen Zhong, Hao Li, Jian-Wei Pan, Li-Chao Peng, Li Li, L.-X. You, L. Zhang, Nai-Le Liu, Wei Li, W.-J. Zhang, Xiao Jiang, Xi-Lin Wang, Xing Ding, Yi Hu, Yuan Li, Yu-Ao Chen, Yu-Ming He, Zu-En Su, Z. Wang","cross_cats":["physics.optics"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-10-11T02:35:35Z","title":"12-photon entanglement and scalable scattershot boson sampling with optimal entangled-photon pairs from parametric down-conversion"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.04823","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":"sha256:79ba017f5154178a833455edf4f0864e3b19159e8a56a2c8a302d1ecaf7b23ab","target":"record","created_at":"2026-05-17T23:47:15Z","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":"80c31f6c3fd44f9a8c397d756a2127918f49e03f5b6ece013c9621efe7d3f2dd","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-10-11T02:35:35Z","title_canon_sha256":"ef07317bf29b513a28f273cc6d5b21ff8c9167910d68acd5e9f013d4991d6e0c"},"schema_version":"1.0","source":{"id":"1810.04823","kind":"arxiv","version":1}},"canonical_sha256":"8ed31bb966c3c4bf2c59bc24fbb1c3a66f61ac34f003439d032334bd62d1e543","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8ed31bb966c3c4bf2c59bc24fbb1c3a66f61ac34f003439d032334bd62d1e543","first_computed_at":"2026-05-17T23:47:15.905809Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:47:15.905809Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"QZGAG0OoXKcWinW5cwb/t6pmNsY94t/QImq5RucmdWjQLoTcsWDXcMgjlGUskEmqW6wq5sWltIMcG8kcp7kuDw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:47:15.906251Z","signed_message":"canonical_sha256_bytes"},"source_id":"1810.04823","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:79ba017f5154178a833455edf4f0864e3b19159e8a56a2c8a302d1ecaf7b23ab","sha256:46a57f933509d6bfb9a17fb29527d6ba5b7b10dbdc13235a3c7a3cb8a7bb64af"],"state_sha256":"8e81943fc16255bafc475820d1a738f7e6597c934a7caa9ca665b8174b5aa2ac"}