{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:DRMMFD5VLUTEYYNQKVXPSLQZJ7","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":"557eb4f4a497ddc0ef950430520c8901c0bc235b33c53d15abd0af2a86c54ec8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2010-08-31T19:00:48Z","title_canon_sha256":"687ecf328e4d6b11ab906697e785203b76fd685c7ec342a9f05262f660c4e4e6"},"schema_version":"1.0","source":{"id":"1008.5392","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1008.5392","created_at":"2026-05-18T04:41:36Z"},{"alias_kind":"arxiv_version","alias_value":"1008.5392v1","created_at":"2026-05-18T04:41:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1008.5392","created_at":"2026-05-18T04:41:36Z"},{"alias_kind":"pith_short_12","alias_value":"DRMMFD5VLUTE","created_at":"2026-05-18T12:26:06Z"},{"alias_kind":"pith_short_16","alias_value":"DRMMFD5VLUTEYYNQ","created_at":"2026-05-18T12:26:06Z"},{"alias_kind":"pith_short_8","alias_value":"DRMMFD5V","created_at":"2026-05-18T12:26:06Z"}],"graph_snapshots":[{"event_id":"sha256:aae064e08e08620918e587ac743152ce325a514c959b79f068206839d853028e","target":"graph","created_at":"2026-05-18T04:41:36Z","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"},"paper":{"abstract_excerpt":"A photonic analogue of Klein tunneling (KT), i.e. of the exotic property of relativistic electrons to pass a large repulsive and sharp potential step, is proposed for pulse propagation in a nonuniform fiber Bragg grating with an embedded chirped region. KT can be simply observed as the opening of a transmission window inside the grating stop band, provided that the impressed chirp is realized over a length of the order of the analogue of the Compton wavelength.","authors_text":"Stefano Longhi","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2010-08-31T19:00:48Z","title":"Klein tunneling of light in fiber Bragg gratings"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1008.5392","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":"sha256:90c2ef65cff6899d04db9ddcb4a2af574cadf97bf1073084ad189b7b395f1305","target":"record","created_at":"2026-05-18T04:41:36Z","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":"557eb4f4a497ddc0ef950430520c8901c0bc235b33c53d15abd0af2a86c54ec8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2010-08-31T19:00:48Z","title_canon_sha256":"687ecf328e4d6b11ab906697e785203b76fd685c7ec342a9f05262f660c4e4e6"},"schema_version":"1.0","source":{"id":"1008.5392","kind":"arxiv","version":1}},"canonical_sha256":"1c58c28fb55d264c61b0556ef92e194fd85bb66084df9ac314a2043b8c3d2027","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1c58c28fb55d264c61b0556ef92e194fd85bb66084df9ac314a2043b8c3d2027","first_computed_at":"2026-05-18T04:41:36.058402Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:41:36.058402Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"zPnluFVBHkxYbTwkzWhWsvUHvkW6o8HXjjfpAL80Auaehxn+od5rfJRf19eWY2IdT/Zdb4aga27rUmnZ40PDCw==","signature_status":"signed_v1","signed_at":"2026-05-18T04:41:36.058825Z","signed_message":"canonical_sha256_bytes"},"source_id":"1008.5392","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:90c2ef65cff6899d04db9ddcb4a2af574cadf97bf1073084ad189b7b395f1305","sha256:aae064e08e08620918e587ac743152ce325a514c959b79f068206839d853028e"],"state_sha256":"1d0d616602ded9c88cb8af7b71bc27f68cc8f2760ac457797f586f331f3213c3"}