{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:FLUUQMSPQCJWHXMZRAI4MU35ZV","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":"3dc46426f3ece9f5f260325d6c35017bf236f5e90532e64a56985b1c378f09ad","cross_cats_sorted":["gr-qc","physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2019-08-14T09:55:01Z","title_canon_sha256":"db790956fc19e85436528b73396b32fe22ed9a059a297b122d17a391d7c4c7b3"},"schema_version":"1.0","source":{"id":"1908.05049","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.05049","created_at":"2026-07-04T23:58:29Z"},{"alias_kind":"arxiv_version","alias_value":"1908.05049v2","created_at":"2026-07-04T23:58:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.05049","created_at":"2026-07-04T23:58:29Z"},{"alias_kind":"pith_short_12","alias_value":"FLUUQMSPQCJW","created_at":"2026-07-04T23:58:29Z"},{"alias_kind":"pith_short_16","alias_value":"FLUUQMSPQCJWHXMZ","created_at":"2026-07-04T23:58:29Z"},{"alias_kind":"pith_short_8","alias_value":"FLUUQMSP","created_at":"2026-07-04T23:58:29Z"}],"graph_snapshots":[{"event_id":"sha256:bfa563634eeb353bc4a6eafd2f4527618dde0196325b03ce7acb96eaddab344f","target":"graph","created_at":"2026-07-04T23:58:29Z","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/1908.05049/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Hawking radiation, a manifestation of quantum field theory in curved spacetime, has stimulated extensive theoretical and experimental studies of various black-hole (BH) analogs. However, an undisputed confirmation of Hawking radiation remains elusive. One challenge is BH analog structures with long-lived horizons are difficult to achieve. Here, we theoretically demonstrate a new type of optical BH analog based on light cone evolution associated with topological phase transition of Dirac cones. The transition from a type-II to type-I Dirac/Weyl cone creates an analogous curved spacetime that cr","authors_text":"Feng Liu, Hongxing Xu, Huaqing Huang, Meng Kang, Shunping Zhang","cross_cats":["gr-qc","physics.optics"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2019-08-14T09:55:01Z","title":"Optical Black-hole Analog Created by Topological Phase Transition with a Long-lived Horizon"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.05049","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:d9a0143f38da4f5ca89c4ab67b4e34ad802e461dbd623918dd688220a2cf652f","target":"record","created_at":"2026-07-04T23:58:29Z","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":"3dc46426f3ece9f5f260325d6c35017bf236f5e90532e64a56985b1c378f09ad","cross_cats_sorted":["gr-qc","physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2019-08-14T09:55:01Z","title_canon_sha256":"db790956fc19e85436528b73396b32fe22ed9a059a297b122d17a391d7c4c7b3"},"schema_version":"1.0","source":{"id":"1908.05049","kind":"arxiv","version":2}},"canonical_sha256":"2ae948324f809363dd998811c6537dcd7c9334acf3873c0af54d6683f30c2a2b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2ae948324f809363dd998811c6537dcd7c9334acf3873c0af54d6683f30c2a2b","first_computed_at":"2026-07-04T23:58:29.060743Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T23:58:29.060743Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"w0smfYnO1IHudwn3WLUijgrUjIFSbH+VJW0i3YhDYsR/mjKaqOzDXZtdhB3HXjye69rquw+wQSnaT78ZKEwHAQ==","signature_status":"signed_v1","signed_at":"2026-07-04T23:58:29.061156Z","signed_message":"canonical_sha256_bytes"},"source_id":"1908.05049","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d9a0143f38da4f5ca89c4ab67b4e34ad802e461dbd623918dd688220a2cf652f","sha256:bfa563634eeb353bc4a6eafd2f4527618dde0196325b03ce7acb96eaddab344f"],"state_sha256":"dcd17ad9ca5d1b61c42b4c5aee4c9e0cd7e7fcce786b06df37b1b5ce17757246"}