{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:VRNBDBBODRVAR5W6GYTKKM2WTD","short_pith_number":"pith:VRNBDBBO","canonical_record":{"source":{"id":"1412.4134","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-12-12T21:14:49Z","cross_cats_sorted":[],"title_canon_sha256":"edbd309785c6db01b807860f3915cbca8dc1ef711168ea29b8adddb19a3627af","abstract_canon_sha256":"0d47b311f9816c92617975dd2236ebd7547a6e394c8619c0df37b6b0aea8b030"},"schema_version":"1.0"},"canonical_sha256":"ac5a11842e1c6a08f6de3626a5335698e29f08e0e00a7437820fb5b8d8dbc26c","source":{"kind":"arxiv","id":"1412.4134","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1412.4134","created_at":"2026-05-18T02:31:20Z"},{"alias_kind":"arxiv_version","alias_value":"1412.4134v1","created_at":"2026-05-18T02:31:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1412.4134","created_at":"2026-05-18T02:31:20Z"},{"alias_kind":"pith_short_12","alias_value":"VRNBDBBODRVA","created_at":"2026-05-18T12:28:54Z"},{"alias_kind":"pith_short_16","alias_value":"VRNBDBBODRVAR5W6","created_at":"2026-05-18T12:28:54Z"},{"alias_kind":"pith_short_8","alias_value":"VRNBDBBO","created_at":"2026-05-18T12:28:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:VRNBDBBODRVAR5W6GYTKKM2WTD","target":"record","payload":{"canonical_record":{"source":{"id":"1412.4134","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-12-12T21:14:49Z","cross_cats_sorted":[],"title_canon_sha256":"edbd309785c6db01b807860f3915cbca8dc1ef711168ea29b8adddb19a3627af","abstract_canon_sha256":"0d47b311f9816c92617975dd2236ebd7547a6e394c8619c0df37b6b0aea8b030"},"schema_version":"1.0"},"canonical_sha256":"ac5a11842e1c6a08f6de3626a5335698e29f08e0e00a7437820fb5b8d8dbc26c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:31:20.095496Z","signature_b64":"orne0hnqukxwL9OLgStQSJfXn0Q6qUUzN0KgLYAcGbIrzZCValVRFMq6z81E9A38tWL7Xp8T+1rgQMRcP3HnAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ac5a11842e1c6a08f6de3626a5335698e29f08e0e00a7437820fb5b8d8dbc26c","last_reissued_at":"2026-05-18T02:31:20.094879Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:31:20.094879Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1412.4134","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:31:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7e82+ygi8o4JenmitT2iFe96e6T+2jg/TDsj5wYPYbww7LkYYZvFj7ha433Oqp39CIymSt+9H1kWRa4D1S5ZAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T05:25:03.297820Z"},"content_sha256":"a417532ae34316f5955613de1a7e0f4c9743a00fef6b0dca7326554e1984830f","schema_version":"1.0","event_id":"sha256:a417532ae34316f5955613de1a7e0f4c9743a00fef6b0dca7326554e1984830f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:VRNBDBBODRVAR5W6GYTKKM2WTD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Characterizing an Entangled-Photon Source with Classical Detectors and Measurements","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Aephraim M. Steinberg, Alex Hayat, Chao Wang, Dylan H. Mahler, John E. Sipe, Lee A. Rozema, Marco Liscidini","submitted_at":"2014-12-12T21:14:49Z","abstract_excerpt":"Quantum state tomography (QST) is a universal tool for the design and optimization of entangled-photon sources. It typically requires single-photon detectors and coincidence measurements. Recently, it was suggested that the information provided by the QST of photon pairs generated by spontaneous parametric down-conversion could be obtained by exploiting the stimulated version of this process, namely difference frequency generation. In this protocol, so-called \"stimulated-emission tomography\" (SET), a seed field is injected along with the pump pulse, and the resulting stimulated emission is mea"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1412.4134","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:31:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZvQ0M2km7RsYzSOYypS287HVNX9YTVnFpdahzmfQna7fCa6KrXvVrjy8iYEmxw8wPM5EYoD0BEXN1+b4iGsdBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T05:25:03.298554Z"},"content_sha256":"84790ff945deac1b29ec910a1d887c4dd61ea0a39967bcc5fd602a73ddac53bd","schema_version":"1.0","event_id":"sha256:84790ff945deac1b29ec910a1d887c4dd61ea0a39967bcc5fd602a73ddac53bd"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VRNBDBBODRVAR5W6GYTKKM2WTD/bundle.json","state_url":"https://pith.science/pith/VRNBDBBODRVAR5W6GYTKKM2WTD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VRNBDBBODRVAR5W6GYTKKM2WTD/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-06T05:25:03Z","links":{"resolver":"https://pith.science/pith/VRNBDBBODRVAR5W6GYTKKM2WTD","bundle":"https://pith.science/pith/VRNBDBBODRVAR5W6GYTKKM2WTD/bundle.json","state":"https://pith.science/pith/VRNBDBBODRVAR5W6GYTKKM2WTD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VRNBDBBODRVAR5W6GYTKKM2WTD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:VRNBDBBODRVAR5W6GYTKKM2WTD","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":"0d47b311f9816c92617975dd2236ebd7547a6e394c8619c0df37b6b0aea8b030","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-12-12T21:14:49Z","title_canon_sha256":"edbd309785c6db01b807860f3915cbca8dc1ef711168ea29b8adddb19a3627af"},"schema_version":"1.0","source":{"id":"1412.4134","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1412.4134","created_at":"2026-05-18T02:31:20Z"},{"alias_kind":"arxiv_version","alias_value":"1412.4134v1","created_at":"2026-05-18T02:31:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1412.4134","created_at":"2026-05-18T02:31:20Z"},{"alias_kind":"pith_short_12","alias_value":"VRNBDBBODRVA","created_at":"2026-05-18T12:28:54Z"},{"alias_kind":"pith_short_16","alias_value":"VRNBDBBODRVAR5W6","created_at":"2026-05-18T12:28:54Z"},{"alias_kind":"pith_short_8","alias_value":"VRNBDBBO","created_at":"2026-05-18T12:28:54Z"}],"graph_snapshots":[{"event_id":"sha256:84790ff945deac1b29ec910a1d887c4dd61ea0a39967bcc5fd602a73ddac53bd","target":"graph","created_at":"2026-05-18T02:31:20Z","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 state tomography (QST) is a universal tool for the design and optimization of entangled-photon sources. It typically requires single-photon detectors and coincidence measurements. Recently, it was suggested that the information provided by the QST of photon pairs generated by spontaneous parametric down-conversion could be obtained by exploiting the stimulated version of this process, namely difference frequency generation. In this protocol, so-called \"stimulated-emission tomography\" (SET), a seed field is injected along with the pump pulse, and the resulting stimulated emission is mea","authors_text":"Aephraim M. Steinberg, Alex Hayat, Chao Wang, Dylan H. Mahler, John E. Sipe, Lee A. Rozema, Marco Liscidini","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-12-12T21:14:49Z","title":"Characterizing an Entangled-Photon Source with Classical Detectors and Measurements"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1412.4134","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:a417532ae34316f5955613de1a7e0f4c9743a00fef6b0dca7326554e1984830f","target":"record","created_at":"2026-05-18T02:31:20Z","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":"0d47b311f9816c92617975dd2236ebd7547a6e394c8619c0df37b6b0aea8b030","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-12-12T21:14:49Z","title_canon_sha256":"edbd309785c6db01b807860f3915cbca8dc1ef711168ea29b8adddb19a3627af"},"schema_version":"1.0","source":{"id":"1412.4134","kind":"arxiv","version":1}},"canonical_sha256":"ac5a11842e1c6a08f6de3626a5335698e29f08e0e00a7437820fb5b8d8dbc26c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ac5a11842e1c6a08f6de3626a5335698e29f08e0e00a7437820fb5b8d8dbc26c","first_computed_at":"2026-05-18T02:31:20.094879Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:31:20.094879Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"orne0hnqukxwL9OLgStQSJfXn0Q6qUUzN0KgLYAcGbIrzZCValVRFMq6z81E9A38tWL7Xp8T+1rgQMRcP3HnAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:31:20.095496Z","signed_message":"canonical_sha256_bytes"},"source_id":"1412.4134","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a417532ae34316f5955613de1a7e0f4c9743a00fef6b0dca7326554e1984830f","sha256:84790ff945deac1b29ec910a1d887c4dd61ea0a39967bcc5fd602a73ddac53bd"],"state_sha256":"c4cc9c7be6eff308ad59f94bb9f6fd61559c665b31e0837a9d2aef6a5e2b1402"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"N9k41uZGvh2W785DHtgjGWWeJfpzWMy/PQWS0rLCDu2ayzqaGlOEVVkpUHBluLN24YNEtyGaQhOIiSm6oY0VCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T05:25:03.302273Z","bundle_sha256":"2533a0da68e4ba79a58175cf3eb938f8f414f35b2185fc1286f3d21625406d68"}}