{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:522C24MFGQBURL27GBUXWSNPPZ","short_pith_number":"pith:522C24MF","canonical_record":{"source":{"id":"0807.3575","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2008-07-22T23:13:16Z","cross_cats_sorted":[],"title_canon_sha256":"e0d32101174d9f7f0a7565b177338c464bbd2c083281898c0d9d22d89ffd9f4a","abstract_canon_sha256":"5b0c3334495fb070b71b24753a61309fe742b251338ae2812f9ddd10c0be4a77"},"schema_version":"1.0"},"canonical_sha256":"eeb42d7185340348af5f30697b49af7e79ab6d0cc47f751c798bf27a5abebf0c","source":{"kind":"arxiv","id":"0807.3575","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0807.3575","created_at":"2026-05-18T02:15:44Z"},{"alias_kind":"arxiv_version","alias_value":"0807.3575v2","created_at":"2026-05-18T02:15:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0807.3575","created_at":"2026-05-18T02:15:44Z"},{"alias_kind":"pith_short_12","alias_value":"522C24MFGQBU","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_16","alias_value":"522C24MFGQBURL27","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_8","alias_value":"522C24MF","created_at":"2026-05-18T12:25:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:522C24MFGQBURL27GBUXWSNPPZ","target":"record","payload":{"canonical_record":{"source":{"id":"0807.3575","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2008-07-22T23:13:16Z","cross_cats_sorted":[],"title_canon_sha256":"e0d32101174d9f7f0a7565b177338c464bbd2c083281898c0d9d22d89ffd9f4a","abstract_canon_sha256":"5b0c3334495fb070b71b24753a61309fe742b251338ae2812f9ddd10c0be4a77"},"schema_version":"1.0"},"canonical_sha256":"eeb42d7185340348af5f30697b49af7e79ab6d0cc47f751c798bf27a5abebf0c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:15:44.671303Z","signature_b64":"6oijBBb/S+FEqskrD0ivraoCHVaw7pwYyb4QBXo+s0798QL9c9oXeQwjAqCdChNH2dIRWyNbXxmaF8mMzPaiBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"eeb42d7185340348af5f30697b49af7e79ab6d0cc47f751c798bf27a5abebf0c","last_reissued_at":"2026-05-18T02:15:44.670753Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:15:44.670753Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0807.3575","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":"2026-05-18T02:15:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ktra720rRYD43rXJHhmhAOyYyVNB+2qWs90QuhomUtRPkmJrtkAuGR69sIcXJYFxD/n1afeKFiIzuxoyOPzCAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T08:34:22.528339Z"},"content_sha256":"69e60ec3ce0f045372f590fc35f8964422f0a42f1c8c60db69445aaac2fd3b0e","schema_version":"1.0","event_id":"sha256:69e60ec3ce0f045372f590fc35f8964422f0a42f1c8c60db69445aaac2fd3b0e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:522C24MFGQBURL27GBUXWSNPPZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A classical theory for second-harmonic generation from metallic nanoparticles","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Jerome V. Moloney, Jinjie Liu, Stephan W. Koch, Walter Hoyer, Yong Zeng","submitted_at":"2008-07-22T23:13:16Z","abstract_excerpt":"In this article, we develop a classical electrodynamic theory to study the optical nonlinearities of metallic nanoparticles. The quasi-free electrons inside the metal are approximated as a classical Coulomb-interacting electron gas, and their motion under the excitation of an external electromagnetic field is described by the plasma equations. This theory is further tailored to study second-harmonic generation. Through detailed experiment-theory comparisons, we validate this classical theory as well as the associated numerical algorithm. It is demonstrated that our theory not only provides qua"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0807.3575","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":"2026-05-18T02:15:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SHuMnS0LGfpJiVqPjQqfPjshuDFUYysoBUJqhSqkW7BjDaJF33+NE5HnBSUu2nXJ/I9Z7p/84sSYLOi+71GVCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T08:34:22.528698Z"},"content_sha256":"f9cee3082bc0f825c73e0a8958bf16466453dcaa0e29ff1d1e8e419428b954d0","schema_version":"1.0","event_id":"sha256:f9cee3082bc0f825c73e0a8958bf16466453dcaa0e29ff1d1e8e419428b954d0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/522C24MFGQBURL27GBUXWSNPPZ/bundle.json","state_url":"https://pith.science/pith/522C24MFGQBURL27GBUXWSNPPZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/522C24MFGQBURL27GBUXWSNPPZ/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":"2026-05-30T08:34:22Z","links":{"resolver":"https://pith.science/pith/522C24MFGQBURL27GBUXWSNPPZ","bundle":"https://pith.science/pith/522C24MFGQBURL27GBUXWSNPPZ/bundle.json","state":"https://pith.science/pith/522C24MFGQBURL27GBUXWSNPPZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/522C24MFGQBURL27GBUXWSNPPZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:522C24MFGQBURL27GBUXWSNPPZ","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":"5b0c3334495fb070b71b24753a61309fe742b251338ae2812f9ddd10c0be4a77","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2008-07-22T23:13:16Z","title_canon_sha256":"e0d32101174d9f7f0a7565b177338c464bbd2c083281898c0d9d22d89ffd9f4a"},"schema_version":"1.0","source":{"id":"0807.3575","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0807.3575","created_at":"2026-05-18T02:15:44Z"},{"alias_kind":"arxiv_version","alias_value":"0807.3575v2","created_at":"2026-05-18T02:15:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0807.3575","created_at":"2026-05-18T02:15:44Z"},{"alias_kind":"pith_short_12","alias_value":"522C24MFGQBU","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_16","alias_value":"522C24MFGQBURL27","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_8","alias_value":"522C24MF","created_at":"2026-05-18T12:25:56Z"}],"graph_snapshots":[{"event_id":"sha256:f9cee3082bc0f825c73e0a8958bf16466453dcaa0e29ff1d1e8e419428b954d0","target":"graph","created_at":"2026-05-18T02:15:44Z","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 article, we develop a classical electrodynamic theory to study the optical nonlinearities of metallic nanoparticles. The quasi-free electrons inside the metal are approximated as a classical Coulomb-interacting electron gas, and their motion under the excitation of an external electromagnetic field is described by the plasma equations. This theory is further tailored to study second-harmonic generation. Through detailed experiment-theory comparisons, we validate this classical theory as well as the associated numerical algorithm. It is demonstrated that our theory not only provides qua","authors_text":"Jerome V. Moloney, Jinjie Liu, Stephan W. Koch, Walter Hoyer, Yong Zeng","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2008-07-22T23:13:16Z","title":"A classical theory for second-harmonic generation from metallic nanoparticles"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0807.3575","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":"sha256:69e60ec3ce0f045372f590fc35f8964422f0a42f1c8c60db69445aaac2fd3b0e","target":"record","created_at":"2026-05-18T02:15:44Z","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":"5b0c3334495fb070b71b24753a61309fe742b251338ae2812f9ddd10c0be4a77","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2008-07-22T23:13:16Z","title_canon_sha256":"e0d32101174d9f7f0a7565b177338c464bbd2c083281898c0d9d22d89ffd9f4a"},"schema_version":"1.0","source":{"id":"0807.3575","kind":"arxiv","version":2}},"canonical_sha256":"eeb42d7185340348af5f30697b49af7e79ab6d0cc47f751c798bf27a5abebf0c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"eeb42d7185340348af5f30697b49af7e79ab6d0cc47f751c798bf27a5abebf0c","first_computed_at":"2026-05-18T02:15:44.670753Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:15:44.670753Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6oijBBb/S+FEqskrD0ivraoCHVaw7pwYyb4QBXo+s0798QL9c9oXeQwjAqCdChNH2dIRWyNbXxmaF8mMzPaiBg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:15:44.671303Z","signed_message":"canonical_sha256_bytes"},"source_id":"0807.3575","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:69e60ec3ce0f045372f590fc35f8964422f0a42f1c8c60db69445aaac2fd3b0e","sha256:f9cee3082bc0f825c73e0a8958bf16466453dcaa0e29ff1d1e8e419428b954d0"],"state_sha256":"e056c54cd94705479a4c50b629a4e4b24f3cf47fece0c94bd354d76f1490d585"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WmNE5YMvP0OHvzfgXcvljIKyR6QLX6wN8A/WLLkVaVnUbu1SEVbT2l53kRFVgP/zHx9GzvkagenGmClw7C74Bg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T08:34:22.530662Z","bundle_sha256":"9257d7e069ec909ee4e70e1b7da37026da7f9bf4290ca33152c48338d6d968cc"}}