{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2024:H47EDPCA6VCKSBFSVCTK7XTXT6","short_pith_number":"pith:H47EDPCA","schema_version":"1.0","canonical_sha256":"3f3e41bc40f544a904b2a8a6afde779fb1f6a0c33aa2e31402792ff167a0b295","source":{"kind":"arxiv","id":"2403.06905","version":1},"attestation_state":"computed","paper":{"title":"Biphoton State Reconstruction via Phase Retrieval Methods","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["physics.optics"],"primary_cat":"quant-ph","authors_text":"Alessio D'Errico, Ebrahim Karimi, Francesco Di Colandrea, Nazanin Dehghan","submitted_at":"2024-03-11T16:56:37Z","abstract_excerpt":"The complete measurement of the quantum state of two correlated photons requires reconstructing the amplitude and phase of the biphoton wavefunction. We show how, by means of spatially resolved single photon detection, one can infer the spatial structure of bi-photons generated by spontaneous parametric down conversion. In particular, a spatially resolved analysis of the second-order correlations allows us to isolate the moduli of the pump and phasematching contributions to the two-photon states. When carrying this analysis on different propagation planes, the free space propagation of pump an"},"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":"2403.06905","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2024-03-11T16:56:37Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"c04244a69d5fd861a4039676a4a5d2a10686554faeb4d610a90fec4b81f0cf20","abstract_canon_sha256":"ee2611d2da8ec621cd318272ba22ffe559a9c390986ded4614882915ca89877f"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:26:42.005325Z","signature_b64":"7CGfXneTxZAjkdZePp2nVh3CkUfA36Iw8hLqd5zhvA/nAqU+9mh7xljhJsLiGQIbo5GgLd5Gc5YXJWFFtn7ZDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3f3e41bc40f544a904b2a8a6afde779fb1f6a0c33aa2e31402792ff167a0b295","last_reissued_at":"2026-07-05T11:26:42.004706Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:26:42.004706Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Biphoton State Reconstruction via Phase Retrieval Methods","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["physics.optics"],"primary_cat":"quant-ph","authors_text":"Alessio D'Errico, Ebrahim Karimi, Francesco Di Colandrea, Nazanin Dehghan","submitted_at":"2024-03-11T16:56:37Z","abstract_excerpt":"The complete measurement of the quantum state of two correlated photons requires reconstructing the amplitude and phase of the biphoton wavefunction. We show how, by means of spatially resolved single photon detection, one can infer the spatial structure of bi-photons generated by spontaneous parametric down conversion. In particular, a spatially resolved analysis of the second-order correlations allows us to isolate the moduli of the pump and phasematching contributions to the two-photon states. When carrying this analysis on different propagation planes, the free space propagation of pump an"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2403.06905","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2403.06905/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2403.06905","created_at":"2026-07-05T11:26:42.004774+00:00"},{"alias_kind":"arxiv_version","alias_value":"2403.06905v1","created_at":"2026-07-05T11:26:42.004774+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2403.06905","created_at":"2026-07-05T11:26:42.004774+00:00"},{"alias_kind":"pith_short_12","alias_value":"H47EDPCA6VCK","created_at":"2026-07-05T11:26:42.004774+00:00"},{"alias_kind":"pith_short_16","alias_value":"H47EDPCA6VCKSBFS","created_at":"2026-07-05T11:26:42.004774+00:00"},{"alias_kind":"pith_short_8","alias_value":"H47EDPCA","created_at":"2026-07-05T11:26:42.004774+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/H47EDPCA6VCKSBFSVCTK7XTXT6","json":"https://pith.science/pith/H47EDPCA6VCKSBFSVCTK7XTXT6.json","graph_json":"https://pith.science/api/pith-number/H47EDPCA6VCKSBFSVCTK7XTXT6/graph.json","events_json":"https://pith.science/api/pith-number/H47EDPCA6VCKSBFSVCTK7XTXT6/events.json","paper":"https://pith.science/paper/H47EDPCA"},"agent_actions":{"view_html":"https://pith.science/pith/H47EDPCA6VCKSBFSVCTK7XTXT6","download_json":"https://pith.science/pith/H47EDPCA6VCKSBFSVCTK7XTXT6.json","view_paper":"https://pith.science/paper/H47EDPCA","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2403.06905&json=true","fetch_graph":"https://pith.science/api/pith-number/H47EDPCA6VCKSBFSVCTK7XTXT6/graph.json","fetch_events":"https://pith.science/api/pith-number/H47EDPCA6VCKSBFSVCTK7XTXT6/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/H47EDPCA6VCKSBFSVCTK7XTXT6/action/timestamp_anchor","attest_storage":"https://pith.science/pith/H47EDPCA6VCKSBFSVCTK7XTXT6/action/storage_attestation","attest_author":"https://pith.science/pith/H47EDPCA6VCKSBFSVCTK7XTXT6/action/author_attestation","sign_citation":"https://pith.science/pith/H47EDPCA6VCKSBFSVCTK7XTXT6/action/citation_signature","submit_replication":"https://pith.science/pith/H47EDPCA6VCKSBFSVCTK7XTXT6/action/replication_record"}},"created_at":"2026-07-05T11:26:42.004774+00:00","updated_at":"2026-07-05T11:26:42.004774+00:00"}