{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:JV4JUHRFFQ4DQNEPKRRWR245G4","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":"0c7247c12c870e8192c6b86255a66b9136ade93061725cc6024b71e7f5124032","cross_cats_sorted":["physics.atom-ph","physics.optics"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-07-26T06:17:26Z","title_canon_sha256":"e4988111627526bc94a82bb995f7502165b1e9d0b78deb8007967e8f05e2c4c7"},"schema_version":"1.0","source":{"id":"2607.23483","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.23483","created_at":"2026-07-28T01:22:55Z"},{"alias_kind":"arxiv_version","alias_value":"2607.23483v1","created_at":"2026-07-28T01:22:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.23483","created_at":"2026-07-28T01:22:55Z"},{"alias_kind":"pith_short_12","alias_value":"JV4JUHRFFQ4D","created_at":"2026-07-28T01:22:55Z"},{"alias_kind":"pith_short_16","alias_value":"JV4JUHRFFQ4DQNEP","created_at":"2026-07-28T01:22:55Z"},{"alias_kind":"pith_short_8","alias_value":"JV4JUHRF","created_at":"2026-07-28T01:22:55Z"}],"graph_snapshots":[{"event_id":"sha256:ef2395afe3c2818f47e90ea2a610177351bcdf65adf8aa43b4a463647da1fa26","target":"graph","created_at":"2026-07-28T01:22:55Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2607.23483/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We introduce the pair second-order correlation function $g_{\\textrm{pairs}}^{\\left(2\\right)}=\\left\\langle \\left(P^{\\dagger}\\right)^{2}P^{2}\\right\\rangle /\\left\\langle P^{\\dagger}P\\right\\rangle ^{2}$, defined through the pair operator $P^{\\dagger}=a^{\\dagger}b^{\\dagger}$, to characterize second-order correlations and pair bunching and antibunching in photon-pair creation processes. This quantity directly probes correlations between pair-generation events within a single two-mode quantum state, providing access to the intrinsic pair-generation process beyond conventional single-mode or heralded ","authors_text":"Chien-Chang Chen, Hsi-Sheng Goan, Ite A. Yu","cross_cats":["physics.atom-ph","physics.optics"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-07-26T06:17:26Z","title":"Photon pair antibunching and second-order correlations between pair events"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.23483","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":"sha256:8e5ebb7edad266e06e662fbd7cf5cd8889f5465922c1478c056f18ec79a186c4","target":"record","created_at":"2026-07-28T01:22:55Z","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":"0c7247c12c870e8192c6b86255a66b9136ade93061725cc6024b71e7f5124032","cross_cats_sorted":["physics.atom-ph","physics.optics"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-07-26T06:17:26Z","title_canon_sha256":"e4988111627526bc94a82bb995f7502165b1e9d0b78deb8007967e8f05e2c4c7"},"schema_version":"1.0","source":{"id":"2607.23483","kind":"arxiv","version":1}},"canonical_sha256":"4d789a1e252c3838348f546368eb9d3724eb28883e2f39d55fa0f60fe51adaf3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4d789a1e252c3838348f546368eb9d3724eb28883e2f39d55fa0f60fe51adaf3","first_computed_at":"2026-07-28T01:22:55.378559Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-28T01:22:55.378559Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"klMshk39G97NPfHJNYY0E5etpgjq5vE9XE0V2N0BQjw7Sb6hTkf2pllXo/F3+lTKQlW6i7tqKMmEzUnLTkIyBw==","signature_status":"signed_v1","signed_at":"2026-07-28T01:22:55.379381Z","signed_message":"canonical_sha256_bytes"},"source_id":"2607.23483","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8e5ebb7edad266e06e662fbd7cf5cd8889f5465922c1478c056f18ec79a186c4","sha256:ef2395afe3c2818f47e90ea2a610177351bcdf65adf8aa43b4a463647da1fa26"],"state_sha256":"8fc3fbbf6b0d29ac9fb08ecf5516cbcbf8d46dd47e4351c50debf51aad4e3f88"}