{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:TJAR32CINVT73B4DMBJEXCCXEB","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":"b8298775afcde9a4e5596c97f32294914f4760df6ab680f31120396631fc4f4a","cross_cats_sorted":["physics.app-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2023-09-02T13:22:50Z","title_canon_sha256":"af41ffc088cb1350289ed29675efb4c1450b96430f11ed8aad9b1d2684bc911a"},"schema_version":"1.0","source":{"id":"2309.00936","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2309.00936","created_at":"2026-07-05T06:47:29Z"},{"alias_kind":"arxiv_version","alias_value":"2309.00936v1","created_at":"2026-07-05T06:47:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2309.00936","created_at":"2026-07-05T06:47:29Z"},{"alias_kind":"pith_short_12","alias_value":"TJAR32CINVT7","created_at":"2026-07-05T06:47:29Z"},{"alias_kind":"pith_short_16","alias_value":"TJAR32CINVT73B4D","created_at":"2026-07-05T06:47:29Z"},{"alias_kind":"pith_short_8","alias_value":"TJAR32CI","created_at":"2026-07-05T06:47:29Z"}],"graph_snapshots":[{"event_id":"sha256:08d762aff9cfc4fef996912bbe9b77424afe70b12fd85e83178ab78372a794a6","target":"graph","created_at":"2026-07-05T06:47:29Z","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/2309.00936/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Entangled photon pairs are an important resource for quantum cryptography schemes that go beyond point-to-point communication. Semiconductor Bragg-reflection waveguides are a promising photon-pair source due to mature fabrication, integrability, large transparency window in the telecom wavelength range, integration capabilities for electro-optical devices as well as a high second-order nonlinear coefficient. To increase performance we improved the fabrication of Bragg-reflection waveguides by employing fixed-beam-moving-stage optical lithography, low pressure and low chlorine concentration etc","authors_text":"Alexander Schlager, Bianca Nardi, Christian Schneider, Gregor Weihs, Hannah Thiel, Holger Suchomel, Marita Wagner, Martin Kamp, Robert J. Chapman, Stefan Frick, Sven H\\\"ofling","cross_cats":["physics.app-ph"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2023-09-02T13:22:50Z","title":"Fabrication of low-loss III-V Bragg-reflection waveguides for parametric down-conversion"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2309.00936","kind":"arxiv","version":1},"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:e2dad2a437309ac24623d363239ccd47429859719c1f639cbc5c4e78401a3435","target":"record","created_at":"2026-07-05T06:47:29Z","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":"b8298775afcde9a4e5596c97f32294914f4760df6ab680f31120396631fc4f4a","cross_cats_sorted":["physics.app-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2023-09-02T13:22:50Z","title_canon_sha256":"af41ffc088cb1350289ed29675efb4c1450b96430f11ed8aad9b1d2684bc911a"},"schema_version":"1.0","source":{"id":"2309.00936","kind":"arxiv","version":1}},"canonical_sha256":"9a411de8486d67fd878360524b8857206a2c089d56dc6023b5957101c9872747","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9a411de8486d67fd878360524b8857206a2c089d56dc6023b5957101c9872747","first_computed_at":"2026-07-05T06:47:29.883016Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T06:47:29.883016Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"idHN+1GhfTmre2+fyZvHh3YWz6Rg/KnoSdpGcWeLMck8aOeGprLjSGcuXJynKMhiCE7XCjw4P0UpN4wtTrlZBg==","signature_status":"signed_v1","signed_at":"2026-07-05T06:47:29.883429Z","signed_message":"canonical_sha256_bytes"},"source_id":"2309.00936","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e2dad2a437309ac24623d363239ccd47429859719c1f639cbc5c4e78401a3435","sha256:08d762aff9cfc4fef996912bbe9b77424afe70b12fd85e83178ab78372a794a6"],"state_sha256":"8827eeb5e2322c053554b9effbbf96930fb9056c2b986c92a9aa93a26e5da6da"}