{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:DNL2XRHKUVJX6I4TNOPX2Y2QG5","short_pith_number":"pith:DNL2XRHK","canonical_record":{"source":{"id":"0802.2672","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2008-02-19T15:43:18Z","cross_cats_sorted":[],"title_canon_sha256":"414fbb210b75ceb33c7a6deddcb16bc1f9e23b4fdbccc8d3734e0e829ff55694","abstract_canon_sha256":"ae721849b854ed6aa1cde5b91f2720db2a87a0cedd6b3133e3a334fcd5892e4b"},"schema_version":"1.0"},"canonical_sha256":"1b57abc4eaa5537f23936b9f7d63503764849a01c6b9c10aa2524429c8d5fca8","source":{"kind":"arxiv","id":"0802.2672","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0802.2672","created_at":"2026-05-18T02:16:01Z"},{"alias_kind":"arxiv_version","alias_value":"0802.2672v2","created_at":"2026-05-18T02:16:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0802.2672","created_at":"2026-05-18T02:16:01Z"},{"alias_kind":"pith_short_12","alias_value":"DNL2XRHKUVJX","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_16","alias_value":"DNL2XRHKUVJX6I4T","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_8","alias_value":"DNL2XRHK","created_at":"2026-05-18T12:25:57Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:DNL2XRHKUVJX6I4TNOPX2Y2QG5","target":"record","payload":{"canonical_record":{"source":{"id":"0802.2672","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2008-02-19T15:43:18Z","cross_cats_sorted":[],"title_canon_sha256":"414fbb210b75ceb33c7a6deddcb16bc1f9e23b4fdbccc8d3734e0e829ff55694","abstract_canon_sha256":"ae721849b854ed6aa1cde5b91f2720db2a87a0cedd6b3133e3a334fcd5892e4b"},"schema_version":"1.0"},"canonical_sha256":"1b57abc4eaa5537f23936b9f7d63503764849a01c6b9c10aa2524429c8d5fca8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:16:01.003061Z","signature_b64":"3UriAS6gJzhrJ6A47WYIubzeniM7kD0nJTWcldfBCw+zZAcmca19WeEEYwetiK0Sn4ccHDkK5deqBJX4kYJoBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1b57abc4eaa5537f23936b9f7d63503764849a01c6b9c10aa2524429c8d5fca8","last_reissued_at":"2026-05-18T02:16:01.002544Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:16:01.002544Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0802.2672","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:16:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OkwJir6ilaGA4+FUUj+y9kbHJcvqJjGPysEnQAOtrkZ7PsXW49F8awi9r2MYMiIrzLu2Nbvlf6eGm9teUUUXDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T19:30:45.189468Z"},"content_sha256":"4c4805407b549336f64444cfe7169c51703af00d956b77110c88094a4a3d078d","schema_version":"1.0","event_id":"sha256:4c4805407b549336f64444cfe7169c51703af00d956b77110c88094a4a3d078d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:DNL2XRHKUVJX6I4TNOPX2Y2QG5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Systematic study of the PDC speckle structure for quantum imaging applications","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"A.Meda, E. Predazzi, G.Brida, I.Ruo-Berchera, M.Genovese","submitted_at":"2008-02-19T15:43:18Z","abstract_excerpt":"Sub shot noise imaging of weak object by exploiting Parametric Down Converted light represents a very interesting technological development. A precise characterization of PDC speckle structure in dependence of pump beam parameters is a fundamental tool for this application. In this paper we present a first set of data addressed to this purpose."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0802.2672","kind":"arxiv","version":2},"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":"2026-05-18T02:16:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0fYrgkmYejwiJKpNhMUiQ6iFEkNfx0l51Fhr88zlD94wpw1sDfQ+Co41wWXrI7tEjaEfxClGIG61w17qfTzCBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T19:30:45.189916Z"},"content_sha256":"9a30ec1c02fb434dc1cf125b67fabb407ff48eb22d5bf7d3249bd7186327037c","schema_version":"1.0","event_id":"sha256:9a30ec1c02fb434dc1cf125b67fabb407ff48eb22d5bf7d3249bd7186327037c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DNL2XRHKUVJX6I4TNOPX2Y2QG5/bundle.json","state_url":"https://pith.science/pith/DNL2XRHKUVJX6I4TNOPX2Y2QG5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DNL2XRHKUVJX6I4TNOPX2Y2QG5/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":"2026-06-06T19:30:45Z","links":{"resolver":"https://pith.science/pith/DNL2XRHKUVJX6I4TNOPX2Y2QG5","bundle":"https://pith.science/pith/DNL2XRHKUVJX6I4TNOPX2Y2QG5/bundle.json","state":"https://pith.science/pith/DNL2XRHKUVJX6I4TNOPX2Y2QG5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DNL2XRHKUVJX6I4TNOPX2Y2QG5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:DNL2XRHKUVJX6I4TNOPX2Y2QG5","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":"ae721849b854ed6aa1cde5b91f2720db2a87a0cedd6b3133e3a334fcd5892e4b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2008-02-19T15:43:18Z","title_canon_sha256":"414fbb210b75ceb33c7a6deddcb16bc1f9e23b4fdbccc8d3734e0e829ff55694"},"schema_version":"1.0","source":{"id":"0802.2672","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0802.2672","created_at":"2026-05-18T02:16:01Z"},{"alias_kind":"arxiv_version","alias_value":"0802.2672v2","created_at":"2026-05-18T02:16:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0802.2672","created_at":"2026-05-18T02:16:01Z"},{"alias_kind":"pith_short_12","alias_value":"DNL2XRHKUVJX","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_16","alias_value":"DNL2XRHKUVJX6I4T","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_8","alias_value":"DNL2XRHK","created_at":"2026-05-18T12:25:57Z"}],"graph_snapshots":[{"event_id":"sha256:9a30ec1c02fb434dc1cf125b67fabb407ff48eb22d5bf7d3249bd7186327037c","target":"graph","created_at":"2026-05-18T02:16:01Z","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":"Sub shot noise imaging of weak object by exploiting Parametric Down Converted light represents a very interesting technological development. A precise characterization of PDC speckle structure in dependence of pump beam parameters is a fundamental tool for this application. In this paper we present a first set of data addressed to this purpose.","authors_text":"A.Meda, E. Predazzi, G.Brida, I.Ruo-Berchera, M.Genovese","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2008-02-19T15:43:18Z","title":"Systematic study of the PDC speckle structure for quantum imaging applications"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0802.2672","kind":"arxiv","version":2},"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":"sha256:4c4805407b549336f64444cfe7169c51703af00d956b77110c88094a4a3d078d","target":"record","created_at":"2026-05-18T02:16:01Z","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":"ae721849b854ed6aa1cde5b91f2720db2a87a0cedd6b3133e3a334fcd5892e4b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2008-02-19T15:43:18Z","title_canon_sha256":"414fbb210b75ceb33c7a6deddcb16bc1f9e23b4fdbccc8d3734e0e829ff55694"},"schema_version":"1.0","source":{"id":"0802.2672","kind":"arxiv","version":2}},"canonical_sha256":"1b57abc4eaa5537f23936b9f7d63503764849a01c6b9c10aa2524429c8d5fca8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1b57abc4eaa5537f23936b9f7d63503764849a01c6b9c10aa2524429c8d5fca8","first_computed_at":"2026-05-18T02:16:01.002544Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:16:01.002544Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3UriAS6gJzhrJ6A47WYIubzeniM7kD0nJTWcldfBCw+zZAcmca19WeEEYwetiK0Sn4ccHDkK5deqBJX4kYJoBw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:16:01.003061Z","signed_message":"canonical_sha256_bytes"},"source_id":"0802.2672","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4c4805407b549336f64444cfe7169c51703af00d956b77110c88094a4a3d078d","sha256:9a30ec1c02fb434dc1cf125b67fabb407ff48eb22d5bf7d3249bd7186327037c"],"state_sha256":"fa69a6a373efacafba124f16ef2c016369af11d8a6e9ca18012b5fa82af82d95"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sjrrRUzy6wtvgqQ3kv7fv1Q6PxX3KU4F2ph6TePniP47jvdcuvOEL/xvf0zBn4UNIm9bHp7N1HpqadgB6FrhCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T19:30:45.191923Z","bundle_sha256":"d36e734cbce7a4c5091adcbcba1284ca1a734b2f10380091a4c08d0d42b04f8a"}}