{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:AXCRXKHPQEVF5STQARASVGJQEZ","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":"f94f57e0cfbb5596a72420c49acf003f11f1973e3e8f4ecdc78e4f99661b7188","cross_cats_sorted":["cond-mat.stat-mech"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2012-08-14T13:20:23Z","title_canon_sha256":"5ee09ada7f9d864d222bc5ea92a92fb5c5b61c2c899cdf3a11e360c182faeb5a"},"schema_version":"1.0","source":{"id":"1208.2854","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1208.2854","created_at":"2026-05-18T03:36:25Z"},{"alias_kind":"arxiv_version","alias_value":"1208.2854v2","created_at":"2026-05-18T03:36:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1208.2854","created_at":"2026-05-18T03:36:25Z"},{"alias_kind":"pith_short_12","alias_value":"AXCRXKHPQEVF","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_16","alias_value":"AXCRXKHPQEVF5STQ","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_8","alias_value":"AXCRXKHP","created_at":"2026-05-18T12:26:58Z"}],"graph_snapshots":[{"event_id":"sha256:00a9b4679609ad145a84a0710df96e6cad84851e82ea5de1c49a6f24d4812afe","target":"graph","created_at":"2026-05-18T03:36:25Z","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 interactions between an excitation (similar to a pair of Nambu monopoles) and a lattice defect are studied in an artificial two-dimensional square spin ice. This is done by considering a square array of islands containing only one island different from all others. This difference is incorporated in the magnetic moment (spin) of the \"imperfect\" island and several cases are studied, including the special situation in which this distinct spin is zero (vacancy). We have shown that the two extreme points of a malformed island behave like two opposite magnetic charges. Then, the effective intera","authors_text":"A. R. Pereira, G. M. Wysin, L. A. S. M\\'ol, R. C. Silva, R. J. C. Lopes, W. A. Moura-Melo","cross_cats":["cond-mat.stat-mech"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2012-08-14T13:20:23Z","title":"Nambu monopoles interacting with lattice defects in two-dimensional artificial square spin ice"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1208.2854","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:a218c71d05dab0fab32e842922d8341b9f07ce8c210b56038f24e1bb7c7c0d49","target":"record","created_at":"2026-05-18T03:36:25Z","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":"f94f57e0cfbb5596a72420c49acf003f11f1973e3e8f4ecdc78e4f99661b7188","cross_cats_sorted":["cond-mat.stat-mech"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2012-08-14T13:20:23Z","title_canon_sha256":"5ee09ada7f9d864d222bc5ea92a92fb5c5b61c2c899cdf3a11e360c182faeb5a"},"schema_version":"1.0","source":{"id":"1208.2854","kind":"arxiv","version":2}},"canonical_sha256":"05c51ba8ef812a5eca7004412a993026776bbd0e7917541ed999232e736302d0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"05c51ba8ef812a5eca7004412a993026776bbd0e7917541ed999232e736302d0","first_computed_at":"2026-05-18T03:36:25.079791Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:36:25.079791Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"rPLLXhC9Inw/Yndp+8bRteXIN4P6tt4selKZWBXSNLdlMFzAZMiDaEHkD5cz+/dAliABs5NEGDunGRxlYqzDCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:36:25.080337Z","signed_message":"canonical_sha256_bytes"},"source_id":"1208.2854","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a218c71d05dab0fab32e842922d8341b9f07ce8c210b56038f24e1bb7c7c0d49","sha256:00a9b4679609ad145a84a0710df96e6cad84851e82ea5de1c49a6f24d4812afe"],"state_sha256":"486a19b58a0ed4198a9cc127e0cfb52e0b588317a4e063609fe3fbc042f1705d"}