{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2008:RTN5B4ZMWLYQEN3JVTXGS4WRCU","short_pith_number":"pith:RTN5B4ZM","schema_version":"1.0","canonical_sha256":"8cdbd0f32cb2f1023769acee6972d115330216cde8efbe80f635129f45fdf013","source":{"kind":"arxiv","id":"0812.3597","version":1},"attestation_state":"computed","paper":{"title":"How Colors Influence Numbers: Photon Statistics of Parametric Downconversion","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Christine Silberhorn, Malte Avenhaus, Wolfgang Mauerer, Wolfram Helwig","submitted_at":"2008-12-18T19:31:36Z","abstract_excerpt":"Parametric downconversion (PDC) is a technique of ubiquitous experimental significance in the production of non-classical, photon-number correlated twin beams. Standard theory of PDC as a two-mode squeezing process predicts and homodyne measurements observe a thermal photon number distribution per beam. Recent experiments have obtained conflicting distributions. In this paper, we explain the observation by an a-priori theoretical model solely based on directly accessible physical quantities. We compare our predictions with experimental data and find excellent agreement."},"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":"0812.3597","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2008-12-18T19:31:36Z","cross_cats_sorted":[],"title_canon_sha256":"7cebe5a80fee4bc6eb05ce0e354a80c728046941d797b3eefde6ca069ca195f2","abstract_canon_sha256":"98f3764488d167eff51295eb539d81272aa7188d634170ade89012760fcebbab"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:24:08.644750Z","signature_b64":"r3NBaPIQOx5CuWphRxNvrBBCsYZ4vNaIfkcgJZcVbX+6F6r+8Phgn1rysvbHMtvrdZxQymLFACrc1C3nlXMSBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8cdbd0f32cb2f1023769acee6972d115330216cde8efbe80f635129f45fdf013","last_reissued_at":"2026-05-18T03:24:08.644058Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:24:08.644058Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"How Colors Influence Numbers: Photon Statistics of Parametric Downconversion","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Christine Silberhorn, Malte Avenhaus, Wolfgang Mauerer, Wolfram Helwig","submitted_at":"2008-12-18T19:31:36Z","abstract_excerpt":"Parametric downconversion (PDC) is a technique of ubiquitous experimental significance in the production of non-classical, photon-number correlated twin beams. Standard theory of PDC as a two-mode squeezing process predicts and homodyne measurements observe a thermal photon number distribution per beam. Recent experiments have obtained conflicting distributions. In this paper, we explain the observation by an a-priori theoretical model solely based on directly accessible physical quantities. We compare our predictions with experimental data and find excellent agreement."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0812.3597","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"0812.3597","created_at":"2026-05-18T03:24:08.644194+00:00"},{"alias_kind":"arxiv_version","alias_value":"0812.3597v1","created_at":"2026-05-18T03:24:08.644194+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0812.3597","created_at":"2026-05-18T03:24:08.644194+00:00"},{"alias_kind":"pith_short_12","alias_value":"RTN5B4ZMWLYQ","created_at":"2026-05-18T12:25:58.018023+00:00"},{"alias_kind":"pith_short_16","alias_value":"RTN5B4ZMWLYQEN3J","created_at":"2026-05-18T12:25:58.018023+00:00"},{"alias_kind":"pith_short_8","alias_value":"RTN5B4ZM","created_at":"2026-05-18T12:25:58.018023+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/RTN5B4ZMWLYQEN3JVTXGS4WRCU","json":"https://pith.science/pith/RTN5B4ZMWLYQEN3JVTXGS4WRCU.json","graph_json":"https://pith.science/api/pith-number/RTN5B4ZMWLYQEN3JVTXGS4WRCU/graph.json","events_json":"https://pith.science/api/pith-number/RTN5B4ZMWLYQEN3JVTXGS4WRCU/events.json","paper":"https://pith.science/paper/RTN5B4ZM"},"agent_actions":{"view_html":"https://pith.science/pith/RTN5B4ZMWLYQEN3JVTXGS4WRCU","download_json":"https://pith.science/pith/RTN5B4ZMWLYQEN3JVTXGS4WRCU.json","view_paper":"https://pith.science/paper/RTN5B4ZM","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0812.3597&json=true","fetch_graph":"https://pith.science/api/pith-number/RTN5B4ZMWLYQEN3JVTXGS4WRCU/graph.json","fetch_events":"https://pith.science/api/pith-number/RTN5B4ZMWLYQEN3JVTXGS4WRCU/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/RTN5B4ZMWLYQEN3JVTXGS4WRCU/action/timestamp_anchor","attest_storage":"https://pith.science/pith/RTN5B4ZMWLYQEN3JVTXGS4WRCU/action/storage_attestation","attest_author":"https://pith.science/pith/RTN5B4ZMWLYQEN3JVTXGS4WRCU/action/author_attestation","sign_citation":"https://pith.science/pith/RTN5B4ZMWLYQEN3JVTXGS4WRCU/action/citation_signature","submit_replication":"https://pith.science/pith/RTN5B4ZMWLYQEN3JVTXGS4WRCU/action/replication_record"}},"created_at":"2026-05-18T03:24:08.644194+00:00","updated_at":"2026-05-18T03:24:08.644194+00:00"}