{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:AA3MHMSE5TJ42DD2XVT36M3IKY","short_pith_number":"pith:AA3MHMSE","canonical_record":{"source":{"id":"1207.6934","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2012-07-30T13:28:26Z","cross_cats_sorted":["quant-ph"],"title_canon_sha256":"dc20c9801621c902e6b5f2e600e9036a44ca53f573b5f04c2d32114f10b86fe9","abstract_canon_sha256":"8780976864593214d3fe5ee835edcedb123dc6724fd8a971df80fc0f1b4bd864"},"schema_version":"1.0"},"canonical_sha256":"0036c3b244ecd3cd0c7abd67bf3368560b685056ba07505f16ef92a5ab66616a","source":{"kind":"arxiv","id":"1207.6934","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1207.6934","created_at":"2026-05-18T03:00:49Z"},{"alias_kind":"arxiv_version","alias_value":"1207.6934v1","created_at":"2026-05-18T03:00:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1207.6934","created_at":"2026-05-18T03:00:49Z"},{"alias_kind":"pith_short_12","alias_value":"AA3MHMSE5TJ4","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_16","alias_value":"AA3MHMSE5TJ42DD2","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_8","alias_value":"AA3MHMSE","created_at":"2026-05-18T12:26:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:AA3MHMSE5TJ42DD2XVT36M3IKY","target":"record","payload":{"canonical_record":{"source":{"id":"1207.6934","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2012-07-30T13:28:26Z","cross_cats_sorted":["quant-ph"],"title_canon_sha256":"dc20c9801621c902e6b5f2e600e9036a44ca53f573b5f04c2d32114f10b86fe9","abstract_canon_sha256":"8780976864593214d3fe5ee835edcedb123dc6724fd8a971df80fc0f1b4bd864"},"schema_version":"1.0"},"canonical_sha256":"0036c3b244ecd3cd0c7abd67bf3368560b685056ba07505f16ef92a5ab66616a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:00:49.855952Z","signature_b64":"nK1Fu8YEWedM4hnaRclkn5gDy7f2zEh+WK2MLjpFz1p3ks02nPLxjkKfCmibaQbf2N2TRoNsdZdBzx+8ACpmAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0036c3b244ecd3cd0c7abd67bf3368560b685056ba07505f16ef92a5ab66616a","last_reissued_at":"2026-05-18T03:00:49.855291Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:00:49.855291Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1207.6934","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":"2026-05-18T03:00:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xqra003m5I4qWm2PyZ/2h2ldho9tzFQJohVT34WsbGFrOQCPLHsxIU2H7KrQY/w6GnwCqDmEff4IyFAoxzJbCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T08:29:28.813856Z"},"content_sha256":"3af335f308ac2826419c3801527802718214546532f7cbf21c2d16bc741cc307","schema_version":"1.0","event_id":"sha256:3af335f308ac2826419c3801527802718214546532f7cbf21c2d16bc741cc307"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:AA3MHMSE5TJ42DD2XVT36M3IKY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Experimental observation of the X-shaped near field spatio-temporal correlation of ultra-broadband twin beams","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["quant-ph"],"primary_cat":"physics.optics","authors_text":"A. Gatti, E. Brambilla, O. Jedrkiewicz, P. Di Trapani","submitted_at":"2012-07-30T13:28:26Z","abstract_excerpt":"In this work we present the experimental observation of the non factorable near field spatio-temporal correlation of ultra-broadband twin beams generated by parametric down conversion (PDC), in an interferometric-type experiment using sum frequency generation, where both the temporal and spatial degrees of freedom of PDC light are controlled with very high resolution. The revealed X-structure of the correlation is in accordance with the predictions of the theory."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1207.6934","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":"2026-05-18T03:00:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FntgtYns4U8Wt8JIifiQAuB7NgSjqDQphObs/XrmTY0EV4Y/o8HYyKlkXpnfCoD9klh40t2HgWKE1x9OroDLCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T08:29:28.814271Z"},"content_sha256":"1c794a14890a77515338317b7554aa748f5d1a958718fd2e217707ec2562e73b","schema_version":"1.0","event_id":"sha256:1c794a14890a77515338317b7554aa748f5d1a958718fd2e217707ec2562e73b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/AA3MHMSE5TJ42DD2XVT36M3IKY/bundle.json","state_url":"https://pith.science/pith/AA3MHMSE5TJ42DD2XVT36M3IKY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/AA3MHMSE5TJ42DD2XVT36M3IKY/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":"2026-05-30T08:29:28Z","links":{"resolver":"https://pith.science/pith/AA3MHMSE5TJ42DD2XVT36M3IKY","bundle":"https://pith.science/pith/AA3MHMSE5TJ42DD2XVT36M3IKY/bundle.json","state":"https://pith.science/pith/AA3MHMSE5TJ42DD2XVT36M3IKY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/AA3MHMSE5TJ42DD2XVT36M3IKY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:AA3MHMSE5TJ42DD2XVT36M3IKY","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":"8780976864593214d3fe5ee835edcedb123dc6724fd8a971df80fc0f1b4bd864","cross_cats_sorted":["quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2012-07-30T13:28:26Z","title_canon_sha256":"dc20c9801621c902e6b5f2e600e9036a44ca53f573b5f04c2d32114f10b86fe9"},"schema_version":"1.0","source":{"id":"1207.6934","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1207.6934","created_at":"2026-05-18T03:00:49Z"},{"alias_kind":"arxiv_version","alias_value":"1207.6934v1","created_at":"2026-05-18T03:00:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1207.6934","created_at":"2026-05-18T03:00:49Z"},{"alias_kind":"pith_short_12","alias_value":"AA3MHMSE5TJ4","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_16","alias_value":"AA3MHMSE5TJ42DD2","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_8","alias_value":"AA3MHMSE","created_at":"2026-05-18T12:26:58Z"}],"graph_snapshots":[{"event_id":"sha256:1c794a14890a77515338317b7554aa748f5d1a958718fd2e217707ec2562e73b","target":"graph","created_at":"2026-05-18T03:00:49Z","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":"In this work we present the experimental observation of the non factorable near field spatio-temporal correlation of ultra-broadband twin beams generated by parametric down conversion (PDC), in an interferometric-type experiment using sum frequency generation, where both the temporal and spatial degrees of freedom of PDC light are controlled with very high resolution. The revealed X-structure of the correlation is in accordance with the predictions of the theory.","authors_text":"A. Gatti, E. Brambilla, O. Jedrkiewicz, P. Di Trapani","cross_cats":["quant-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2012-07-30T13:28:26Z","title":"Experimental observation of the X-shaped near field spatio-temporal correlation of ultra-broadband twin beams"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1207.6934","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":"sha256:3af335f308ac2826419c3801527802718214546532f7cbf21c2d16bc741cc307","target":"record","created_at":"2026-05-18T03:00:49Z","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":"8780976864593214d3fe5ee835edcedb123dc6724fd8a971df80fc0f1b4bd864","cross_cats_sorted":["quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2012-07-30T13:28:26Z","title_canon_sha256":"dc20c9801621c902e6b5f2e600e9036a44ca53f573b5f04c2d32114f10b86fe9"},"schema_version":"1.0","source":{"id":"1207.6934","kind":"arxiv","version":1}},"canonical_sha256":"0036c3b244ecd3cd0c7abd67bf3368560b685056ba07505f16ef92a5ab66616a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0036c3b244ecd3cd0c7abd67bf3368560b685056ba07505f16ef92a5ab66616a","first_computed_at":"2026-05-18T03:00:49.855291Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:00:49.855291Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"nK1Fu8YEWedM4hnaRclkn5gDy7f2zEh+WK2MLjpFz1p3ks02nPLxjkKfCmibaQbf2N2TRoNsdZdBzx+8ACpmAg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:00:49.855952Z","signed_message":"canonical_sha256_bytes"},"source_id":"1207.6934","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3af335f308ac2826419c3801527802718214546532f7cbf21c2d16bc741cc307","sha256:1c794a14890a77515338317b7554aa748f5d1a958718fd2e217707ec2562e73b"],"state_sha256":"0fd9d3d22c9277b2b51759d7085e37ed56f1f3315f2b8610f9fcde32a3c0157a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"elqfn9J5TpDKS1lW1kdkVrWO0Nhxfle69P+6jOSIjTDLJhGCIWhum5vwcFFjRjJIuSOGFoWqkzdLSZOJU0iqAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T08:29:28.816929Z","bundle_sha256":"7be520fca10b29313f13238524c7815b9ef73060a454a1b9fefef710b1c74daa"}}