{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:NVGOCA3PLSQ66VSB2YHZIEDQ3Z","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":"748a9a0a5837a249460c7f6f84bec9e38fd55251728974971d0b2d9a3050e6c9","cross_cats_sorted":["cond-mat.mtrl-sci","quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-08-31T20:51:15Z","title_canon_sha256":"5dad4b70793d7629a0baa56408c3aabe063089af66048b13a0c933a449d51511"},"schema_version":"1.0","source":{"id":"1809.00058","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.00058","created_at":"2026-05-18T00:06:36Z"},{"alias_kind":"arxiv_version","alias_value":"1809.00058v1","created_at":"2026-05-18T00:06:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.00058","created_at":"2026-05-18T00:06:36Z"},{"alias_kind":"pith_short_12","alias_value":"NVGOCA3PLSQ6","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_16","alias_value":"NVGOCA3PLSQ66VSB","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_8","alias_value":"NVGOCA3P","created_at":"2026-05-18T12:32:40Z"}],"graph_snapshots":[{"event_id":"sha256:3364639ae7a7dc4d3988a03a6ec02f0e84d033b7003ef64ac604b434f1fd950e","target":"graph","created_at":"2026-05-18T00:06:36Z","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":"The ability to use photonic quasiparticles to control electromagnetic energy far below the diffraction limit is a defining paradigm in nanophotonics. An important recent development in this field is the measurement and manipulation of extremely confined phonon-polariton modes in polar dielectrics such as silicon carbide and hexagonal boron nitride, which pave the way for nanophotonics and extreme light-matter interactions in the mid-IR to THz frequency range. To further advance this promising field, it is of great interest to predict the optical response of recently discovered and yet-to-be-sy","authors_text":"Jennifer Coulter, Nicholas Rivera, Prineha Narang, Thomas Christensen","cross_cats":["cond-mat.mtrl-sci","quant-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-08-31T20:51:15Z","title":"Ab initio calculation of phonon polaritons in silicon carbide and boron nitride"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.00058","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:a82be421ae6e220ca3ec11bdde18e4945a9edc2fff9098a2f03d2440dc3f7c63","target":"record","created_at":"2026-05-18T00:06:36Z","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":"748a9a0a5837a249460c7f6f84bec9e38fd55251728974971d0b2d9a3050e6c9","cross_cats_sorted":["cond-mat.mtrl-sci","quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-08-31T20:51:15Z","title_canon_sha256":"5dad4b70793d7629a0baa56408c3aabe063089af66048b13a0c933a449d51511"},"schema_version":"1.0","source":{"id":"1809.00058","kind":"arxiv","version":1}},"canonical_sha256":"6d4ce1036f5ca1ef5641d60f941070de57b8b1790ab1a9995b60c1481cb9bb80","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6d4ce1036f5ca1ef5641d60f941070de57b8b1790ab1a9995b60c1481cb9bb80","first_computed_at":"2026-05-18T00:06:36.262458Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:06:36.262458Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"COuiUdEf2F5CHdaN/z+yqFb/cMaxmNCzcvnKVOzvbcljWK2QVWhGHkGCpgm2YCAWJ3dFjA79X8SYDbWf2t5BBA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:06:36.263058Z","signed_message":"canonical_sha256_bytes"},"source_id":"1809.00058","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a82be421ae6e220ca3ec11bdde18e4945a9edc2fff9098a2f03d2440dc3f7c63","sha256:3364639ae7a7dc4d3988a03a6ec02f0e84d033b7003ef64ac604b434f1fd950e"],"state_sha256":"beb795c09fdba3012cdf7651fffb0277802d525e9848ab29c2d4a55e14dd396b"}