{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:PK66GCJ3BBTLQINB5JJOVBMSXJ","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":"c5502bba59c1318c009b55a8c15831c993f498816ef9a09e3931f6b76862d804","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-05-24T12:23:07Z","title_canon_sha256":"754994c3ce30dc56d8b700a8e0a76f029ab8c63bedb62bfd123423e031dde0b7"},"schema_version":"1.0","source":{"id":"1305.5708","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1305.5708","created_at":"2026-05-18T03:25:03Z"},{"alias_kind":"arxiv_version","alias_value":"1305.5708v1","created_at":"2026-05-18T03:25:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1305.5708","created_at":"2026-05-18T03:25:03Z"},{"alias_kind":"pith_short_12","alias_value":"PK66GCJ3BBTL","created_at":"2026-05-18T12:27:54Z"},{"alias_kind":"pith_short_16","alias_value":"PK66GCJ3BBTLQINB","created_at":"2026-05-18T12:27:54Z"},{"alias_kind":"pith_short_8","alias_value":"PK66GCJ3","created_at":"2026-05-18T12:27:54Z"}],"graph_snapshots":[{"event_id":"sha256:37be6c8b7c62c10dec120dc62171e6d5ef0dab764de1341b84b030d6ab2bfd3f","target":"graph","created_at":"2026-05-18T03:25:03Z","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":"This paper's purpose is to review the results recently obtained in the Quantum Optics labs of the National Institute of Metrological Research (INRIM) in the field of single- and few-photon detectors calibration, from both the classical and quantum viewpoint. In the first part of the paper is presented the calibration of a single-photon detector with absolute methods, while in the second part we focus on photon-number-resolving detectors, discussing both the classical and quantum characterization of such devices.","authors_text":"A. Avella, A. Meda, E. Taralli, F. Piacentini, G. Brida, I. P. Degiovanni, I. Ruo Berchera, L. Lolli, M. Genovese, M. G. Mingolla, M. Gramegna, M. Rajteri, P. Traina","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-05-24T12:23:07Z","title":"Quantum and classical characterization of single/few photon detectors"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1305.5708","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":"sha256:5ad288bcab4765c3f21296ff51b48e8f4c78d712d1071d6b743e08a2589477c4","target":"record","created_at":"2026-05-18T03:25:03Z","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":"c5502bba59c1318c009b55a8c15831c993f498816ef9a09e3931f6b76862d804","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-05-24T12:23:07Z","title_canon_sha256":"754994c3ce30dc56d8b700a8e0a76f029ab8c63bedb62bfd123423e031dde0b7"},"schema_version":"1.0","source":{"id":"1305.5708","kind":"arxiv","version":1}},"canonical_sha256":"7abde3093b0866b821a1ea52ea8592ba7995005464559662279775232d24acdd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7abde3093b0866b821a1ea52ea8592ba7995005464559662279775232d24acdd","first_computed_at":"2026-05-18T03:25:03.458422Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:25:03.458422Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"8SeQMcgRVUddIGtYh9Ou8UmiESYOFHihrlacaaqr1Frco0Np3V7SG3WgETMMfP1mu6wwXtuYnfrfjoAy5l6kBg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:25:03.458888Z","signed_message":"canonical_sha256_bytes"},"source_id":"1305.5708","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5ad288bcab4765c3f21296ff51b48e8f4c78d712d1071d6b743e08a2589477c4","sha256:37be6c8b7c62c10dec120dc62171e6d5ef0dab764de1341b84b030d6ab2bfd3f"],"state_sha256":"dbc1ad24d5fb927c6823957ebf1bc4fb2f5308c8b24043b87a6952f4ef2b8268"}