{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:ZK4RQDUREVR7VH7W3B53Y665W3","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":"864c73182fafa2789adb1d562d40a6d783059696852f8cde83d48f1a88756169","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2018-09-28T02:13:08Z","title_canon_sha256":"d6798ab3f0a139ac592b32f818a797e64e7d9d592d8dba20d41712166ed6bd7a"},"schema_version":"1.0","source":{"id":"1809.10824","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.10824","created_at":"2026-05-17T23:52:05Z"},{"alias_kind":"arxiv_version","alias_value":"1809.10824v2","created_at":"2026-05-17T23:52:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.10824","created_at":"2026-05-17T23:52:05Z"},{"alias_kind":"pith_short_12","alias_value":"ZK4RQDUREVR7","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_16","alias_value":"ZK4RQDUREVR7VH7W","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_8","alias_value":"ZK4RQDUR","created_at":"2026-05-18T12:33:07Z"}],"graph_snapshots":[{"event_id":"sha256:633c4d4b0ca168052c9479e18c27dd10f0755ae84e120d5cac2a3c053211a9eb","target":"graph","created_at":"2026-05-17T23:52:05Z","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":"Topological electric quadrupole is a recently proposed concept that extends the theory of electric polarization of crystals to higher orders. Such a quadrupole phase supports topological states localized on both edges and corners. In this work, we show that in a quadrupole phase of honeycomb lattice, topological helical edge states and pseudo-spin-polarized corner states appear by making use of a pseudo-spin degree of freedom related to point group symmetry. Furthermore, we argue that a general condition for emergence of helical edge states in a (pseudo-)spinful quadrupole phase is mirror or t","authors_text":"Feng Liu, Hai-Yao Deng, Katsunori Wakabayashi","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2018-09-28T02:13:08Z","title":"Helical Topological Edge States in a Quadrupole Phase"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.10824","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:dde50aee68ecf87fd663d00b232a0797dce7a6d65550d8e52dbeb3629effed7d","target":"record","created_at":"2026-05-17T23:52:05Z","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":"864c73182fafa2789adb1d562d40a6d783059696852f8cde83d48f1a88756169","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2018-09-28T02:13:08Z","title_canon_sha256":"d6798ab3f0a139ac592b32f818a797e64e7d9d592d8dba20d41712166ed6bd7a"},"schema_version":"1.0","source":{"id":"1809.10824","kind":"arxiv","version":2}},"canonical_sha256":"cab9180e912563fa9ff6d87bbc7bddb6e15bbe134e80aca90743f7e0c21d6a92","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cab9180e912563fa9ff6d87bbc7bddb6e15bbe134e80aca90743f7e0c21d6a92","first_computed_at":"2026-05-17T23:52:05.078165Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:52:05.078165Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"0pd6RElNPGURF9TTn5z5pcX8RJj7pe0DS6GZ3crH+XVF2o1atj2I4VLp/v5FsBx6cEmIH5bOOk5n641+AcnSAg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:52:05.078657Z","signed_message":"canonical_sha256_bytes"},"source_id":"1809.10824","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dde50aee68ecf87fd663d00b232a0797dce7a6d65550d8e52dbeb3629effed7d","sha256:633c4d4b0ca168052c9479e18c27dd10f0755ae84e120d5cac2a3c053211a9eb"],"state_sha256":"8d16bbd13b4a2ededde13a5f541584887e1f88ca12963602cc6cc81611fead54"}