{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:4B7OV2EMQZC7ZOCIS5PMI64THL","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":"ddfdc683286238621a289575ead9b8f688cd1c4c371e8ef3cd732df2a399e324","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2018-12-15T09:19:45Z","title_canon_sha256":"b9e1f34f232bc46de47c03501691252d733bc162f3bf2f7d69290462f1c72af8"},"schema_version":"1.0","source":{"id":"1812.06263","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.06263","created_at":"2026-05-17T23:43:04Z"},{"alias_kind":"arxiv_version","alias_value":"1812.06263v2","created_at":"2026-05-17T23:43:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.06263","created_at":"2026-05-17T23:43:04Z"},{"alias_kind":"pith_short_12","alias_value":"4B7OV2EMQZC7","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_16","alias_value":"4B7OV2EMQZC7ZOCI","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_8","alias_value":"4B7OV2EM","created_at":"2026-05-18T12:32:05Z"}],"graph_snapshots":[{"event_id":"sha256:03d951b9a4ea4b2395d5008d2343c9de58b3cab899652b9b656f53758860da08","target":"graph","created_at":"2026-05-17T23:43:04Z","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 studies of topological phases of matter have been extended from condensed matter physics to photonic systems, resulting in fascinating designs of robust photonic devices. Recently, higher-order topological insulators (HOTIs) have been investigated as a novel topological phase of matter beyond the conventional bulk-boundary correspondence. Previous studies of HOTIs have been mainly focused on the topological multipole systems with negative coupling between lattice sites. Here we experimentally demonstrate that second-order topological insulating phases without negative coupling can be reali","authors_text":"Bi-Ye Xie, Guang-Xu Su, Hai Su, Hong-Fei Wang, Ming-Hui Lu, Peng Zhan, Xiao-Peng Shen, Yan-Feng Chen, Zhen-Lin Wang","cross_cats":["physics.optics"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2018-12-15T09:19:45Z","title":"Visualization of higher-order topological insulating phases in two-dimensional dielectric photonic crystals"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.06263","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":"sha256:740696500e953152770fce1801a5be291fac669a067dbb85d3cded25f325e73f","target":"record","created_at":"2026-05-17T23:43:04Z","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":"ddfdc683286238621a289575ead9b8f688cd1c4c371e8ef3cd732df2a399e324","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2018-12-15T09:19:45Z","title_canon_sha256":"b9e1f34f232bc46de47c03501691252d733bc162f3bf2f7d69290462f1c72af8"},"schema_version":"1.0","source":{"id":"1812.06263","kind":"arxiv","version":2}},"canonical_sha256":"e07eeae88c8645fcb848975ec47b933aeb31d197315a7e67c435872266c38cf6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e07eeae88c8645fcb848975ec47b933aeb31d197315a7e67c435872266c38cf6","first_computed_at":"2026-05-17T23:43:04.041043Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:43:04.041043Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"OiysJkUPTqWD0gavREjVxq99IlQ4yBYBgeAvUOrrLsIYFHzzjXIc0f+gvA1o310dLc5GOttHBEVOhvsYGbgGCg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:43:04.041466Z","signed_message":"canonical_sha256_bytes"},"source_id":"1812.06263","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:740696500e953152770fce1801a5be291fac669a067dbb85d3cded25f325e73f","sha256:03d951b9a4ea4b2395d5008d2343c9de58b3cab899652b9b656f53758860da08"],"state_sha256":"77c6bdaeadd148c5a602eb0b6bcd3f01d678c9b6abc7d3b7b299a01b0922fd7d"}