{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:NZUCUQINHJZ2RL3UO2Z2N4FFEL","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":"32e60d991847aa5f57a4084284cd6720527911b1f3db7e6f09c8bf83fc9a81d5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-06-28T05:21:16Z","title_canon_sha256":"ec593c7fd39dd67f656ee2987da736b1af76def52e2c90edab20a434c9621525"},"schema_version":"1.0","source":{"id":"1906.12044","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.12044","created_at":"2026-05-17T23:41:59Z"},{"alias_kind":"arxiv_version","alias_value":"1906.12044v1","created_at":"2026-05-17T23:41:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.12044","created_at":"2026-05-17T23:41:59Z"},{"alias_kind":"pith_short_12","alias_value":"NZUCUQINHJZ2","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_16","alias_value":"NZUCUQINHJZ2RL3U","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_8","alias_value":"NZUCUQIN","created_at":"2026-05-18T12:33:24Z"}],"graph_snapshots":[{"event_id":"sha256:c912e3a4d5e89fe35784d33b69168d334758f775cc0c8847bc87dd7fa2098592","target":"graph","created_at":"2026-05-17T23:41:59Z","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":"We investigate the steady-state photon-number squeezing and quantum entanglement in a network of nondegenerate optical parametric oscillators (NOPOs). We treat each NOPO with Shen's Raman laser model, whose lasing mode provides a photon-number-squeezed state. Two dissipatively coupled NOPOs satisfy Hillery-Zubairy's $HZ1$ entanglement criterion if they are pumped far above the threshold and the dissipative coupling is sufficiently larger than the NOPO cavity loss.","authors_text":"Yoshihisa Yamamoto, Yoshitaka Inui","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-06-28T05:21:16Z","title":"Steady-state squeezing and entanglement in a dissipatively coupled NOPO network"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.12044","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":"sha256:2b4782e30c4b7fb8a95cbe0a4d1a255169bd7a6a33fa8327eea7624f4417de7c","target":"record","created_at":"2026-05-17T23:41:59Z","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":"32e60d991847aa5f57a4084284cd6720527911b1f3db7e6f09c8bf83fc9a81d5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-06-28T05:21:16Z","title_canon_sha256":"ec593c7fd39dd67f656ee2987da736b1af76def52e2c90edab20a434c9621525"},"schema_version":"1.0","source":{"id":"1906.12044","kind":"arxiv","version":1}},"canonical_sha256":"6e682a410d3a73a8af7476b3a6f0a522d0030a1b350672d7018e377f4550ee70","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6e682a410d3a73a8af7476b3a6f0a522d0030a1b350672d7018e377f4550ee70","first_computed_at":"2026-05-17T23:41:59.448763Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:41:59.448763Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"kh6IUIAJsx51QrDxXMZqBQnZfjUGZJq1iNusdZdnJPWIXR2MfPTEli0JBo7SBOE8TKmihGWJ1rzj4UUY+6C6Bw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:41:59.449138Z","signed_message":"canonical_sha256_bytes"},"source_id":"1906.12044","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2b4782e30c4b7fb8a95cbe0a4d1a255169bd7a6a33fa8327eea7624f4417de7c","sha256:c912e3a4d5e89fe35784d33b69168d334758f775cc0c8847bc87dd7fa2098592"],"state_sha256":"14aa0452228cc51304bee58f7f8c060010a40658bed9a9a6b5c38e4660643ed1"}