{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2009:OXWLPZBRMO2YWTBMKMTPY27GD7","short_pith_number":"pith:OXWLPZBR","schema_version":"1.0","canonical_sha256":"75ecb7e43163b58b4c2c5326fc6be61fe9c52ee19260d91fd740e647fabbbe0c","source":{"kind":"arxiv","id":"0907.3595","version":2},"attestation_state":"computed","paper":{"title":"Surface spontaneous parametric down-conversion","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Antonin Luks, Jan Perina Jr, Michael Scalora, Ondrej Haderka","submitted_at":"2009-07-21T09:45:02Z","abstract_excerpt":"Surface spontaneous parametric down-conversion is predicted as a consequence of continuity requirements for electric- and magnetic-field amplitudes at a discontinuity of chi2 nonlinearity. A generalization of the usual two-photon spectral amplitude is suggested to describe this effect. Examples of nonlinear layered structures and periodically-poled nonlinear crystals show that surface contributions to spontaneous down-conversion can be important."},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"0907.3595","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-07-21T09:45:02Z","cross_cats_sorted":[],"title_canon_sha256":"79faa3c904a44ddd9474b2d07cc7c2014fe2bd40746803085c645bf243cbcf5c","abstract_canon_sha256":"0610fd6ab75259846e4e8c5fda9dee567ea6427709b7273df72c56567387f8bc"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:12:55.126120Z","signature_b64":"d/UxmsNIyzlZunweXQl1X7PeaTzT42vagozauVxFHzlUXEFZTpCu8ZyDUaH6xL46l5HKkMwYJTTUywRFd4H5AQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"75ecb7e43163b58b4c2c5326fc6be61fe9c52ee19260d91fd740e647fabbbe0c","last_reissued_at":"2026-05-18T02:12:55.125421Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:12:55.125421Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Surface spontaneous parametric down-conversion","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Antonin Luks, Jan Perina Jr, Michael Scalora, Ondrej Haderka","submitted_at":"2009-07-21T09:45:02Z","abstract_excerpt":"Surface spontaneous parametric down-conversion is predicted as a consequence of continuity requirements for electric- and magnetic-field amplitudes at a discontinuity of chi2 nonlinearity. A generalization of the usual two-photon spectral amplitude is suggested to describe this effect. Examples of nonlinear layered structures and periodically-poled nonlinear crystals show that surface contributions to spontaneous down-conversion can be important."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0907.3595","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"0907.3595","created_at":"2026-05-18T02:12:55.125537+00:00"},{"alias_kind":"arxiv_version","alias_value":"0907.3595v2","created_at":"2026-05-18T02:12:55.125537+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0907.3595","created_at":"2026-05-18T02:12:55.125537+00:00"},{"alias_kind":"pith_short_12","alias_value":"OXWLPZBRMO2Y","created_at":"2026-05-18T12:26:01.383474+00:00"},{"alias_kind":"pith_short_16","alias_value":"OXWLPZBRMO2YWTBM","created_at":"2026-05-18T12:26:01.383474+00:00"},{"alias_kind":"pith_short_8","alias_value":"OXWLPZBR","created_at":"2026-05-18T12:26:01.383474+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/OXWLPZBRMO2YWTBMKMTPY27GD7","json":"https://pith.science/pith/OXWLPZBRMO2YWTBMKMTPY27GD7.json","graph_json":"https://pith.science/api/pith-number/OXWLPZBRMO2YWTBMKMTPY27GD7/graph.json","events_json":"https://pith.science/api/pith-number/OXWLPZBRMO2YWTBMKMTPY27GD7/events.json","paper":"https://pith.science/paper/OXWLPZBR"},"agent_actions":{"view_html":"https://pith.science/pith/OXWLPZBRMO2YWTBMKMTPY27GD7","download_json":"https://pith.science/pith/OXWLPZBRMO2YWTBMKMTPY27GD7.json","view_paper":"https://pith.science/paper/OXWLPZBR","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0907.3595&json=true","fetch_graph":"https://pith.science/api/pith-number/OXWLPZBRMO2YWTBMKMTPY27GD7/graph.json","fetch_events":"https://pith.science/api/pith-number/OXWLPZBRMO2YWTBMKMTPY27GD7/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/OXWLPZBRMO2YWTBMKMTPY27GD7/action/timestamp_anchor","attest_storage":"https://pith.science/pith/OXWLPZBRMO2YWTBMKMTPY27GD7/action/storage_attestation","attest_author":"https://pith.science/pith/OXWLPZBRMO2YWTBMKMTPY27GD7/action/author_attestation","sign_citation":"https://pith.science/pith/OXWLPZBRMO2YWTBMKMTPY27GD7/action/citation_signature","submit_replication":"https://pith.science/pith/OXWLPZBRMO2YWTBMKMTPY27GD7/action/replication_record"}},"created_at":"2026-05-18T02:12:55.125537+00:00","updated_at":"2026-05-18T02:12:55.125537+00:00"}