{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:HWU733LE4Y3J3IJEXKAWWQWUTP","short_pith_number":"pith:HWU733LE","canonical_record":{"source":{"id":"1401.7364","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-01-28T23:04:39Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"6aff4dcd1e5904697931db359aec811619319ce1ded34a19aee3888073d9b404","abstract_canon_sha256":"bcfb1a7092a41bc45c695d2e5766680ef1d357e8c18f4d8a2f2dff36989d1486"},"schema_version":"1.0"},"canonical_sha256":"3da9fded64e6369da124ba816b42d49bccd1053ddce7bd886b3540bdca8dff26","source":{"kind":"arxiv","id":"1401.7364","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1401.7364","created_at":"2026-05-18T02:50:58Z"},{"alias_kind":"arxiv_version","alias_value":"1401.7364v1","created_at":"2026-05-18T02:50:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1401.7364","created_at":"2026-05-18T02:50:58Z"},{"alias_kind":"pith_short_12","alias_value":"HWU733LE4Y3J","created_at":"2026-05-18T12:28:30Z"},{"alias_kind":"pith_short_16","alias_value":"HWU733LE4Y3J3IJE","created_at":"2026-05-18T12:28:30Z"},{"alias_kind":"pith_short_8","alias_value":"HWU733LE","created_at":"2026-05-18T12:28:30Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:HWU733LE4Y3J3IJEXKAWWQWUTP","target":"record","payload":{"canonical_record":{"source":{"id":"1401.7364","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-01-28T23:04:39Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"6aff4dcd1e5904697931db359aec811619319ce1ded34a19aee3888073d9b404","abstract_canon_sha256":"bcfb1a7092a41bc45c695d2e5766680ef1d357e8c18f4d8a2f2dff36989d1486"},"schema_version":"1.0"},"canonical_sha256":"3da9fded64e6369da124ba816b42d49bccd1053ddce7bd886b3540bdca8dff26","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:50:58.613370Z","signature_b64":"RoD3fVDQe/Lo5RF4O9zRs2zVT6uwrETCixcvxHXHClFW1u3XJs7jJtbLSu+DXNOsv/C0w1YJPCzxd9NKgE06CQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3da9fded64e6369da124ba816b42d49bccd1053ddce7bd886b3540bdca8dff26","last_reissued_at":"2026-05-18T02:50:58.612857Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:50:58.612857Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1401.7364","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":"2026-05-18T02:50:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JQqO7pq34j1+T/P4DLCXmeQAIXD2DWsmwqKuWT+S+a9ASPOlYgug4an/OUdlPhEF5NucYTPwV00j/H/R0iszDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T17:57:33.791722Z"},"content_sha256":"2a67e552a5dbdb9464193dc73468e05c6841cc7ebf3fb3f1fd5fa118a000f28e","schema_version":"1.0","event_id":"sha256:2a67e552a5dbdb9464193dc73468e05c6841cc7ebf3fb3f1fd5fa118a000f28e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:HWU733LE4Y3J3IJEXKAWWQWUTP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spatio-temporal entanglement of twin photons: an intuitive picture","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.optics"],"primary_cat":"quant-ph","authors_text":"Alessandra Gatti, Enrico Brambilla, Lucia Caspani, Ottavia Jedrkiewicz, Tommaso Corti","submitted_at":"2014-01-28T23:04:39Z","abstract_excerpt":"We draw an intuitive picture of the spatio-temporal properties of the entangled state of twin photons, where they are described as classical wave-packets. This picture predicts a precise relation between their temporal and transverse spatial separations at the crystal output. The space-time coupling described by classical arguments turns out to determine in a precise way the spatio-temporal structure of the quantum entanglement, analysed by means of the biphotonic correlation and of the Schmidt dimensionality of the entanglement."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1401.7364","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":"2026-05-18T02:50:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EngK6bEPK0o5fS0o9ILhuFUn2BSmTJw3JrKFjS6a4ahuDEipUyG/xgPmkap32C3bR1CKP7jgrxXFdcS31sjFCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T17:57:33.792173Z"},"content_sha256":"75ab8360fedec81a7a214b1a8653ce02783a287acccc9e9d3ec6c89b48928bc2","schema_version":"1.0","event_id":"sha256:75ab8360fedec81a7a214b1a8653ce02783a287acccc9e9d3ec6c89b48928bc2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HWU733LE4Y3J3IJEXKAWWQWUTP/bundle.json","state_url":"https://pith.science/pith/HWU733LE4Y3J3IJEXKAWWQWUTP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HWU733LE4Y3J3IJEXKAWWQWUTP/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":"2026-05-26T17:57:33Z","links":{"resolver":"https://pith.science/pith/HWU733LE4Y3J3IJEXKAWWQWUTP","bundle":"https://pith.science/pith/HWU733LE4Y3J3IJEXKAWWQWUTP/bundle.json","state":"https://pith.science/pith/HWU733LE4Y3J3IJEXKAWWQWUTP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HWU733LE4Y3J3IJEXKAWWQWUTP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:HWU733LE4Y3J3IJEXKAWWQWUTP","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":"bcfb1a7092a41bc45c695d2e5766680ef1d357e8c18f4d8a2f2dff36989d1486","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-01-28T23:04:39Z","title_canon_sha256":"6aff4dcd1e5904697931db359aec811619319ce1ded34a19aee3888073d9b404"},"schema_version":"1.0","source":{"id":"1401.7364","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1401.7364","created_at":"2026-05-18T02:50:58Z"},{"alias_kind":"arxiv_version","alias_value":"1401.7364v1","created_at":"2026-05-18T02:50:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1401.7364","created_at":"2026-05-18T02:50:58Z"},{"alias_kind":"pith_short_12","alias_value":"HWU733LE4Y3J","created_at":"2026-05-18T12:28:30Z"},{"alias_kind":"pith_short_16","alias_value":"HWU733LE4Y3J3IJE","created_at":"2026-05-18T12:28:30Z"},{"alias_kind":"pith_short_8","alias_value":"HWU733LE","created_at":"2026-05-18T12:28:30Z"}],"graph_snapshots":[{"event_id":"sha256:75ab8360fedec81a7a214b1a8653ce02783a287acccc9e9d3ec6c89b48928bc2","target":"graph","created_at":"2026-05-18T02:50:58Z","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 draw an intuitive picture of the spatio-temporal properties of the entangled state of twin photons, where they are described as classical wave-packets. This picture predicts a precise relation between their temporal and transverse spatial separations at the crystal output. The space-time coupling described by classical arguments turns out to determine in a precise way the spatio-temporal structure of the quantum entanglement, analysed by means of the biphotonic correlation and of the Schmidt dimensionality of the entanglement.","authors_text":"Alessandra Gatti, Enrico Brambilla, Lucia Caspani, Ottavia Jedrkiewicz, Tommaso Corti","cross_cats":["physics.optics"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-01-28T23:04:39Z","title":"Spatio-temporal entanglement of twin photons: an intuitive picture"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1401.7364","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":"sha256:2a67e552a5dbdb9464193dc73468e05c6841cc7ebf3fb3f1fd5fa118a000f28e","target":"record","created_at":"2026-05-18T02:50:58Z","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":"bcfb1a7092a41bc45c695d2e5766680ef1d357e8c18f4d8a2f2dff36989d1486","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-01-28T23:04:39Z","title_canon_sha256":"6aff4dcd1e5904697931db359aec811619319ce1ded34a19aee3888073d9b404"},"schema_version":"1.0","source":{"id":"1401.7364","kind":"arxiv","version":1}},"canonical_sha256":"3da9fded64e6369da124ba816b42d49bccd1053ddce7bd886b3540bdca8dff26","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3da9fded64e6369da124ba816b42d49bccd1053ddce7bd886b3540bdca8dff26","first_computed_at":"2026-05-18T02:50:58.612857Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:50:58.612857Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"RoD3fVDQe/Lo5RF4O9zRs2zVT6uwrETCixcvxHXHClFW1u3XJs7jJtbLSu+DXNOsv/C0w1YJPCzxd9NKgE06CQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:50:58.613370Z","signed_message":"canonical_sha256_bytes"},"source_id":"1401.7364","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2a67e552a5dbdb9464193dc73468e05c6841cc7ebf3fb3f1fd5fa118a000f28e","sha256:75ab8360fedec81a7a214b1a8653ce02783a287acccc9e9d3ec6c89b48928bc2"],"state_sha256":"97ba885c62cc9c69277fe02dc719a0687848d02908961b7be7145c9952f627dd"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JW3JhhV/5hakjbPPt8/qrN/79o6J/6ST23afMdHFM0EAxMFwbTWxP0YmZCJS28+6mzljZKSkTLGz9CUj8rtRBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T17:57:33.795204Z","bundle_sha256":"8f5207e293782170c5c5cbc5952d1ee794017fdc1d2fedd92b49fa79cb47d603"}}