{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:3764NNY6RBOJWHV4FRX6MDZTA3","short_pith_number":"pith:3764NNY6","canonical_record":{"source":{"id":"1404.1192","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-04-04T09:29:36Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"f14b895d9edbf3ad055b157d38199c65248a33106c22c21b12bc6e6e5cba7ec0","abstract_canon_sha256":"ee6dd22e51e0bcd3d992f0b77f2aae77392a856257efa4cac7a437dee286d354"},"schema_version":"1.0"},"canonical_sha256":"dffdc6b71e885c9b1ebc2c6fe60f3306db1f7e816b632f8dde8f798c6118c3a6","source":{"kind":"arxiv","id":"1404.1192","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1404.1192","created_at":"2026-05-18T02:54:53Z"},{"alias_kind":"arxiv_version","alias_value":"1404.1192v1","created_at":"2026-05-18T02:54:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1404.1192","created_at":"2026-05-18T02:54:53Z"},{"alias_kind":"pith_short_12","alias_value":"3764NNY6RBOJ","created_at":"2026-05-18T12:28:11Z"},{"alias_kind":"pith_short_16","alias_value":"3764NNY6RBOJWHV4","created_at":"2026-05-18T12:28:11Z"},{"alias_kind":"pith_short_8","alias_value":"3764NNY6","created_at":"2026-05-18T12:28:11Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:3764NNY6RBOJWHV4FRX6MDZTA3","target":"record","payload":{"canonical_record":{"source":{"id":"1404.1192","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-04-04T09:29:36Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"f14b895d9edbf3ad055b157d38199c65248a33106c22c21b12bc6e6e5cba7ec0","abstract_canon_sha256":"ee6dd22e51e0bcd3d992f0b77f2aae77392a856257efa4cac7a437dee286d354"},"schema_version":"1.0"},"canonical_sha256":"dffdc6b71e885c9b1ebc2c6fe60f3306db1f7e816b632f8dde8f798c6118c3a6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:54:53.982758Z","signature_b64":"c4HSzNfKp0Ex3UpmtW8kFcVZV7G5oFtDnt3Ub37YvqlhP27SpmEl6rKvSuJ4dpavi9a1ZRMzjZl+xQNUfZpyCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"dffdc6b71e885c9b1ebc2c6fe60f3306db1f7e816b632f8dde8f798c6118c3a6","last_reissued_at":"2026-05-18T02:54:53.982128Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:54:53.982128Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1404.1192","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":"2026-05-18T02:54:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ucLff21KYG43BAPOFQnkALwK3wIczT/UW8lP2JWlwDQfxnpGM47xNjGcpMUEtDBVqSQozmR2+1aTt1TPybBYAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T21:45:29.546536Z"},"content_sha256":"1a7ac33c7f92121d0057dfaff649ab05098fc657b97df40e7ae5ae85f4f0286f","schema_version":"1.0","event_id":"sha256:1a7ac33c7f92121d0057dfaff649ab05098fc657b97df40e7ae5ae85f4f0286f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:3764NNY6RBOJWHV4FRX6MDZTA3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Tuning curve of type-0 spontaneous parametric down-conversion","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.optics"],"primary_cat":"quant-ph","authors_text":"Andr\\'e Stefanov, B\\\"anz Bessire, Christof Bernhard, Stefan Lerch, Thomas Feurer","submitted_at":"2014-04-04T09:29:36Z","abstract_excerpt":"We study the tuning curve of entangled photons generated by type-0 spontaneous parametric down-conversion in a periodically poled KTP crystal. We demonstrate the X-shaped spatiotemporal structure of the spectrum by means of measurements and numerical simulations. Experiments for different pump waists, crystal temperatures, and crystal lengths are in good agreement with numerical simulations."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1404.1192","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":"2026-05-18T02:54:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FX8xzN0czsj5dLbZJbF+k2Y5TPHRodMu0yN09QNwsV4m7nZHiAxp1LVN9E2USS7j9HIXfzN/aTD5sEuh0G7JAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T21:45:29.546897Z"},"content_sha256":"1c4f5058a3213f501f3721f8c76c79880ca402d72b1c5bbb19268f4b13411110","schema_version":"1.0","event_id":"sha256:1c4f5058a3213f501f3721f8c76c79880ca402d72b1c5bbb19268f4b13411110"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3764NNY6RBOJWHV4FRX6MDZTA3/bundle.json","state_url":"https://pith.science/pith/3764NNY6RBOJWHV4FRX6MDZTA3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3764NNY6RBOJWHV4FRX6MDZTA3/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":"2026-06-04T21:45:29Z","links":{"resolver":"https://pith.science/pith/3764NNY6RBOJWHV4FRX6MDZTA3","bundle":"https://pith.science/pith/3764NNY6RBOJWHV4FRX6MDZTA3/bundle.json","state":"https://pith.science/pith/3764NNY6RBOJWHV4FRX6MDZTA3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3764NNY6RBOJWHV4FRX6MDZTA3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:3764NNY6RBOJWHV4FRX6MDZTA3","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":"ee6dd22e51e0bcd3d992f0b77f2aae77392a856257efa4cac7a437dee286d354","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-04-04T09:29:36Z","title_canon_sha256":"f14b895d9edbf3ad055b157d38199c65248a33106c22c21b12bc6e6e5cba7ec0"},"schema_version":"1.0","source":{"id":"1404.1192","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1404.1192","created_at":"2026-05-18T02:54:53Z"},{"alias_kind":"arxiv_version","alias_value":"1404.1192v1","created_at":"2026-05-18T02:54:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1404.1192","created_at":"2026-05-18T02:54:53Z"},{"alias_kind":"pith_short_12","alias_value":"3764NNY6RBOJ","created_at":"2026-05-18T12:28:11Z"},{"alias_kind":"pith_short_16","alias_value":"3764NNY6RBOJWHV4","created_at":"2026-05-18T12:28:11Z"},{"alias_kind":"pith_short_8","alias_value":"3764NNY6","created_at":"2026-05-18T12:28:11Z"}],"graph_snapshots":[{"event_id":"sha256:1c4f5058a3213f501f3721f8c76c79880ca402d72b1c5bbb19268f4b13411110","target":"graph","created_at":"2026-05-18T02:54:53Z","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 study the tuning curve of entangled photons generated by type-0 spontaneous parametric down-conversion in a periodically poled KTP crystal. We demonstrate the X-shaped spatiotemporal structure of the spectrum by means of measurements and numerical simulations. Experiments for different pump waists, crystal temperatures, and crystal lengths are in good agreement with numerical simulations.","authors_text":"Andr\\'e Stefanov, B\\\"anz Bessire, Christof Bernhard, Stefan Lerch, Thomas Feurer","cross_cats":["physics.optics"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-04-04T09:29:36Z","title":"Tuning curve of type-0 spontaneous parametric down-conversion"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1404.1192","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":"sha256:1a7ac33c7f92121d0057dfaff649ab05098fc657b97df40e7ae5ae85f4f0286f","target":"record","created_at":"2026-05-18T02:54:53Z","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":"ee6dd22e51e0bcd3d992f0b77f2aae77392a856257efa4cac7a437dee286d354","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-04-04T09:29:36Z","title_canon_sha256":"f14b895d9edbf3ad055b157d38199c65248a33106c22c21b12bc6e6e5cba7ec0"},"schema_version":"1.0","source":{"id":"1404.1192","kind":"arxiv","version":1}},"canonical_sha256":"dffdc6b71e885c9b1ebc2c6fe60f3306db1f7e816b632f8dde8f798c6118c3a6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"dffdc6b71e885c9b1ebc2c6fe60f3306db1f7e816b632f8dde8f798c6118c3a6","first_computed_at":"2026-05-18T02:54:53.982128Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:54:53.982128Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"c4HSzNfKp0Ex3UpmtW8kFcVZV7G5oFtDnt3Ub37YvqlhP27SpmEl6rKvSuJ4dpavi9a1ZRMzjZl+xQNUfZpyCw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:54:53.982758Z","signed_message":"canonical_sha256_bytes"},"source_id":"1404.1192","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1a7ac33c7f92121d0057dfaff649ab05098fc657b97df40e7ae5ae85f4f0286f","sha256:1c4f5058a3213f501f3721f8c76c79880ca402d72b1c5bbb19268f4b13411110"],"state_sha256":"08fb74072f7db2d1023b76bcbe62ea4da10054ff15d6558713af69c260a404a8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Boc6g52NiEMrsBr9dnpkF7PE0Ct+08uOTba8CYLUbDppjEUA+hzXVy3Ig4kOz2uEwKfsj5jlNLjdAmy29CtbAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T21:45:29.740771Z","bundle_sha256":"c9a8ed5993da421001914e3fe7c476f3fbb9417c1ae28840305c6bbadffffef1"}}