{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2002:NKQGM4TLRM33IH7RGJJDNPZQ27","short_pith_number":"pith:NKQGM4TL","schema_version":"1.0","canonical_sha256":"6aa066726b8b37b41ff1325236bf30d7e7a1df56f4940acc228d9db1f1a4e73c","source":{"kind":"arxiv","id":"quant-ph/0202088","version":1},"attestation_state":"computed","paper":{"title":"Entangled-photon ellipsometry","license":"","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Alexander V. Sergienko, Ayman F. Abouraddy, Bahaa E. A. Saleh, Jr., Kimani C. Toussaint, Malvin C. Teich","submitted_at":"2002-02-15T17:42:50Z","abstract_excerpt":"Performing reliable measurements in optical metrology, such as those needed in ellipsometry, requires a calibrated source and detector, or a well-characterized reference sample. We present a novel interferometric technique to perform reliable ellipsometric measurements. This technique relies on the use of a non-classical optical source, namely polarization-entangled twin photons generated by spontaneous parametric downconversion from a nonlinear crystal, in conjunction with a coincidence-detection scheme. Ellipsometric measurements acquired with this scheme are absolute, i.e., they require nei"},"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":"quant-ph/0202088","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"quant-ph","submitted_at":"2002-02-15T17:42:50Z","cross_cats_sorted":[],"title_canon_sha256":"29b2c8936881893f39c050d393f1ede026d01e8b57733f91266ae08aa3284920","abstract_canon_sha256":"67857603d881833045c0e201224694a12c80f720c1fe99f1ee6aab46e1406b3b"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:47:09.329017Z","signature_b64":"52e5xnfc6caZmQJ/NCnON9O2g6hQcvhcGhARCSmjX/8jbFGvYCg4hYyFTnO5B8+Nm6QJ7FvWhHCbuEZXaW2tAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6aa066726b8b37b41ff1325236bf30d7e7a1df56f4940acc228d9db1f1a4e73c","last_reissued_at":"2026-05-18T03:47:09.328609Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:47:09.328609Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Entangled-photon ellipsometry","license":"","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Alexander V. Sergienko, Ayman F. Abouraddy, Bahaa E. A. Saleh, Jr., Kimani C. Toussaint, Malvin C. Teich","submitted_at":"2002-02-15T17:42:50Z","abstract_excerpt":"Performing reliable measurements in optical metrology, such as those needed in ellipsometry, requires a calibrated source and detector, or a well-characterized reference sample. We present a novel interferometric technique to perform reliable ellipsometric measurements. This technique relies on the use of a non-classical optical source, namely polarization-entangled twin photons generated by spontaneous parametric downconversion from a nonlinear crystal, in conjunction with a coincidence-detection scheme. Ellipsometric measurements acquired with this scheme are absolute, i.e., they require nei"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"quant-ph/0202088","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":"quant-ph/0202088","created_at":"2026-05-18T03:47:09.328674+00:00"},{"alias_kind":"arxiv_version","alias_value":"quant-ph/0202088v1","created_at":"2026-05-18T03:47:09.328674+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.quant-ph/0202088","created_at":"2026-05-18T03:47:09.328674+00:00"},{"alias_kind":"pith_short_12","alias_value":"NKQGM4TLRM33","created_at":"2026-05-18T12:25:51.375804+00:00"},{"alias_kind":"pith_short_16","alias_value":"NKQGM4TLRM33IH7R","created_at":"2026-05-18T12:25:51.375804+00:00"},{"alias_kind":"pith_short_8","alias_value":"NKQGM4TL","created_at":"2026-05-18T12:25:51.375804+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/NKQGM4TLRM33IH7RGJJDNPZQ27","json":"https://pith.science/pith/NKQGM4TLRM33IH7RGJJDNPZQ27.json","graph_json":"https://pith.science/api/pith-number/NKQGM4TLRM33IH7RGJJDNPZQ27/graph.json","events_json":"https://pith.science/api/pith-number/NKQGM4TLRM33IH7RGJJDNPZQ27/events.json","paper":"https://pith.science/paper/NKQGM4TL"},"agent_actions":{"view_html":"https://pith.science/pith/NKQGM4TLRM33IH7RGJJDNPZQ27","download_json":"https://pith.science/pith/NKQGM4TLRM33IH7RGJJDNPZQ27.json","view_paper":"https://pith.science/paper/NKQGM4TL","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=quant-ph/0202088&json=true","fetch_graph":"https://pith.science/api/pith-number/NKQGM4TLRM33IH7RGJJDNPZQ27/graph.json","fetch_events":"https://pith.science/api/pith-number/NKQGM4TLRM33IH7RGJJDNPZQ27/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/NKQGM4TLRM33IH7RGJJDNPZQ27/action/timestamp_anchor","attest_storage":"https://pith.science/pith/NKQGM4TLRM33IH7RGJJDNPZQ27/action/storage_attestation","attest_author":"https://pith.science/pith/NKQGM4TLRM33IH7RGJJDNPZQ27/action/author_attestation","sign_citation":"https://pith.science/pith/NKQGM4TLRM33IH7RGJJDNPZQ27/action/citation_signature","submit_replication":"https://pith.science/pith/NKQGM4TLRM33IH7RGJJDNPZQ27/action/replication_record"}},"created_at":"2026-05-18T03:47:09.328674+00:00","updated_at":"2026-05-18T03:47:09.328674+00:00"}