{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:DHDGHK4NK6SNCRXQAUTFDFUX35","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":"89f5795644a035346a9ba815218a476a40f4883975ec3d1fd5980ca021078e5c","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2026-03-07T09:21:12Z","title_canon_sha256":"fff7dbd739184224435f615be430b7f97839753fbf8177d819e4e6df94c093a8"},"schema_version":"1.0","source":{"id":"2603.07124","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2603.07124","created_at":"2026-06-02T01:04:15Z"},{"alias_kind":"arxiv_version","alias_value":"2603.07124v2","created_at":"2026-06-02T01:04:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2603.07124","created_at":"2026-06-02T01:04:15Z"},{"alias_kind":"pith_short_12","alias_value":"DHDGHK4NK6SN","created_at":"2026-06-02T01:04:15Z"},{"alias_kind":"pith_short_16","alias_value":"DHDGHK4NK6SNCRXQ","created_at":"2026-06-02T01:04:15Z"},{"alias_kind":"pith_short_8","alias_value":"DHDGHK4N","created_at":"2026-06-02T01:04:15Z"}],"graph_snapshots":[{"event_id":"sha256:5c59e0752f7d0b012c2e40c1ee40770dae02dc1a15e16db2ef9c83db565119ff","target":"graph","created_at":"2026-06-02T01:04:15Z","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/2603.07124/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"This study introduces the Bragg Frequency Converter, a spatiotemporal-periodic grating concept that extends conventional Bragg gratings into the dynamic domain for pure parametric frequency conversion. By selectively time-modulating either the high-index or low-index layers of a quarter-wave stack, the structure achieves directional frequency conversion: high-index modulation yields efficient down-conversion, while low-index modulation produces up-conversion. This layer selectivity stems from the asymmetric Bloch mode distribution and associated phase-matching conditions. One practical realiza","authors_text":"Sajjad Taravati","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2026-03-07T09:21:12Z","title":"The Bragg Frequency Convertor: A Meeting Between Spatial and Temporal Periodicities For Selective Parametric Frequency Translation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2603.07124","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:eb51a5ae438e4241d693315b091b3a15f320448515d175c0798a604a82cb165c","target":"record","created_at":"2026-06-02T01:04:15Z","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":"89f5795644a035346a9ba815218a476a40f4883975ec3d1fd5980ca021078e5c","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2026-03-07T09:21:12Z","title_canon_sha256":"fff7dbd739184224435f615be430b7f97839753fbf8177d819e4e6df94c093a8"},"schema_version":"1.0","source":{"id":"2603.07124","kind":"arxiv","version":2}},"canonical_sha256":"19c663ab8d57a4d146f00526519697df7facba9bbc1bcc5fee5dd13530780a26","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"19c663ab8d57a4d146f00526519697df7facba9bbc1bcc5fee5dd13530780a26","first_computed_at":"2026-06-02T01:04:15.967685Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-02T01:04:15.967685Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"JDOLxrwJunVQDvZbNM5kplBzNZ+j9ZF3cALBNnt/D0yM4LUML3uf2p8O4ztL36+ZsiY1h1EHUAxgXMm1rOdNBQ==","signature_status":"signed_v1","signed_at":"2026-06-02T01:04:15.968144Z","signed_message":"canonical_sha256_bytes"},"source_id":"2603.07124","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:eb51a5ae438e4241d693315b091b3a15f320448515d175c0798a604a82cb165c","sha256:5c59e0752f7d0b012c2e40c1ee40770dae02dc1a15e16db2ef9c83db565119ff"],"state_sha256":"07ad8c608975d9d6b4c64354941921dcd6a396a1add10183fe0d326987c092bf"}