{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2009:UKFGYBQGIZHOWW57X52XVNVSQC","short_pith_number":"pith:UKFGYBQG","schema_version":"1.0","canonical_sha256":"a28a6c0606464eeb5bbfbf757ab6b280a88d42aa98efc3d261e0e0749209c6a2","source":{"kind":"arxiv","id":"0903.2756","version":1},"attestation_state":"computed","paper":{"title":"Quantum interference of biphotons at a blazed grating","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Dietmar Korn, Dirk Puhlmann, Martin Ostermeyer","submitted_at":"2009-03-16T17:14:57Z","abstract_excerpt":"Correlations between photons are interesting for a number of applications and concepts in metrology in particular for resolution improvements in different methods of quantum imaging. Since Fock-states of N-photons of wavelength lambda in interference schemes acquire N-times the phase shift of single photons these states can appear as if they had a de Broglie wavelength of lambda/N. A biphoton beam diffracted at a blazed grating shows this reduced de Broglie wavelength. This experiment can be seen as a purification of biphotons of a certain correlation strength on the one hand. On the other han"},"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":"0903.2756","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-03-16T17:14:57Z","cross_cats_sorted":[],"title_canon_sha256":"5108f5ccab6c03ba6d030265d59e78b99203954ffcf89a8f9ad266301cec72b2","abstract_canon_sha256":"ce2a077f329672fd6e935f38d24855e1119a276755550c5db928ee64504646c1"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:14:28.012541Z","signature_b64":"Grxlje/NH/5y4GvXixTSq+4EvTkkTs3LaEHke2Z0+skNBkNNcOv3hbwGq6ir5zWaz/eLlqe7y7pzNZpfnZorDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a28a6c0606464eeb5bbfbf757ab6b280a88d42aa98efc3d261e0e0749209c6a2","last_reissued_at":"2026-05-18T02:14:28.011990Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:14:28.011990Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Quantum interference of biphotons at a blazed grating","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Dietmar Korn, Dirk Puhlmann, Martin Ostermeyer","submitted_at":"2009-03-16T17:14:57Z","abstract_excerpt":"Correlations between photons are interesting for a number of applications and concepts in metrology in particular for resolution improvements in different methods of quantum imaging. Since Fock-states of N-photons of wavelength lambda in interference schemes acquire N-times the phase shift of single photons these states can appear as if they had a de Broglie wavelength of lambda/N. A biphoton beam diffracted at a blazed grating shows this reduced de Broglie wavelength. This experiment can be seen as a purification of biphotons of a certain correlation strength on the one hand. On the other han"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0903.2756","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":"0903.2756","created_at":"2026-05-18T02:14:28.012063+00:00"},{"alias_kind":"arxiv_version","alias_value":"0903.2756v1","created_at":"2026-05-18T02:14:28.012063+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0903.2756","created_at":"2026-05-18T02:14:28.012063+00:00"},{"alias_kind":"pith_short_12","alias_value":"UKFGYBQGIZHO","created_at":"2026-05-18T12:26:02.257875+00:00"},{"alias_kind":"pith_short_16","alias_value":"UKFGYBQGIZHOWW57","created_at":"2026-05-18T12:26:02.257875+00:00"},{"alias_kind":"pith_short_8","alias_value":"UKFGYBQG","created_at":"2026-05-18T12:26:02.257875+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/UKFGYBQGIZHOWW57X52XVNVSQC","json":"https://pith.science/pith/UKFGYBQGIZHOWW57X52XVNVSQC.json","graph_json":"https://pith.science/api/pith-number/UKFGYBQGIZHOWW57X52XVNVSQC/graph.json","events_json":"https://pith.science/api/pith-number/UKFGYBQGIZHOWW57X52XVNVSQC/events.json","paper":"https://pith.science/paper/UKFGYBQG"},"agent_actions":{"view_html":"https://pith.science/pith/UKFGYBQGIZHOWW57X52XVNVSQC","download_json":"https://pith.science/pith/UKFGYBQGIZHOWW57X52XVNVSQC.json","view_paper":"https://pith.science/paper/UKFGYBQG","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0903.2756&json=true","fetch_graph":"https://pith.science/api/pith-number/UKFGYBQGIZHOWW57X52XVNVSQC/graph.json","fetch_events":"https://pith.science/api/pith-number/UKFGYBQGIZHOWW57X52XVNVSQC/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/UKFGYBQGIZHOWW57X52XVNVSQC/action/timestamp_anchor","attest_storage":"https://pith.science/pith/UKFGYBQGIZHOWW57X52XVNVSQC/action/storage_attestation","attest_author":"https://pith.science/pith/UKFGYBQGIZHOWW57X52XVNVSQC/action/author_attestation","sign_citation":"https://pith.science/pith/UKFGYBQGIZHOWW57X52XVNVSQC/action/citation_signature","submit_replication":"https://pith.science/pith/UKFGYBQGIZHOWW57X52XVNVSQC/action/replication_record"}},"created_at":"2026-05-18T02:14:28.012063+00:00","updated_at":"2026-05-18T02:14:28.012063+00:00"}