{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:JWBPXBHINDDPAVDEWBIWFDMS4U","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"5d1841126a1e540858e4a30b098809e7283264c81938fc94fa8485c6ae894bab","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2024-05-07T14:39:18Z","title_canon_sha256":"8021cea1b0ece8e6ee7237c1469a4a392b0e94a3d5f167c6460b54160ec29606"},"schema_version":"1.0","source":{"id":"2405.04360","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2405.04360","created_at":"2026-07-05T09:21:44Z"},{"alias_kind":"arxiv_version","alias_value":"2405.04360v2","created_at":"2026-07-05T09:21:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2405.04360","created_at":"2026-07-05T09:21:44Z"},{"alias_kind":"pith_short_12","alias_value":"JWBPXBHINDDP","created_at":"2026-07-05T09:21:44Z"},{"alias_kind":"pith_short_16","alias_value":"JWBPXBHINDDPAVDE","created_at":"2026-07-05T09:21:44Z"},{"alias_kind":"pith_short_8","alias_value":"JWBPXBHI","created_at":"2026-07-05T09:21:44Z"}],"graph_snapshots":[{"event_id":"sha256:0c44918b29d99e0185af52600abe6ff17dacfbe1101a627dc976a478b3181ae7","target":"graph","created_at":"2026-07-05T09:21:44Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2405.04360/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present an experimental implementation of a polarization-entangled photon pair source based on beam displacers. The down-converted photons are emitted via spontaneous parametric down-conversion in a non-degenerate and type-0 process. We obtain a state fidelity of $F=0.975\\pm0.004$ and violate a Clauser-Horne-Shimony-Holt inequality with $S=2.75\\pm0.01$. Our source also uses thin crystals for applications in quantum imaging, taking advantage of the large number of spatial modes. We estimate that our source could produce 550$\\pm$12 spatial modes.","authors_text":"Jorge Fuenzalida, Markus Gr\\\"afe, Minjae Hong, Rodrigo Gomez, Valerio Flavio Gili","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2024-05-07T14:39:18Z","title":"Polarization-entangled photon pair source using beam displacers and thin crystals"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2405.04360","kind":"arxiv","version":2},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:9eb2ac7a7ed21cae3e97a7e03fef1811bf7b9a5858612cc66765cb0655ab2b83","target":"record","created_at":"2026-07-05T09:21:44Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"5d1841126a1e540858e4a30b098809e7283264c81938fc94fa8485c6ae894bab","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2024-05-07T14:39:18Z","title_canon_sha256":"8021cea1b0ece8e6ee7237c1469a4a392b0e94a3d5f167c6460b54160ec29606"},"schema_version":"1.0","source":{"id":"2405.04360","kind":"arxiv","version":2}},"canonical_sha256":"4d82fb84e868c6f05464b051628d92e52fe22d4b060fbc955b987411f6a77770","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4d82fb84e868c6f05464b051628d92e52fe22d4b060fbc955b987411f6a77770","first_computed_at":"2026-07-05T09:21:44.235376Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T09:21:44.235376Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"22Eqo4SdUkzmHDS4lkMP+mXJRu26JyPuS9c0OixVPvfCZcrtZkTM91qMWyq5vMoDD+MLM8Y6ZjTTF6N3muOpAQ==","signature_status":"signed_v1","signed_at":"2026-07-05T09:21:44.235886Z","signed_message":"canonical_sha256_bytes"},"source_id":"2405.04360","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9eb2ac7a7ed21cae3e97a7e03fef1811bf7b9a5858612cc66765cb0655ab2b83","sha256:0c44918b29d99e0185af52600abe6ff17dacfbe1101a627dc976a478b3181ae7"],"state_sha256":"a4af267a49eca280a246cb9e61873a8397a4fca780badd89df8ff35401ab3b62"}