{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:AXCRXKHPQEVF5STQARASVGJQEZ","short_pith_number":"pith:AXCRXKHP","canonical_record":{"source":{"id":"1208.2854","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2012-08-14T13:20:23Z","cross_cats_sorted":["cond-mat.stat-mech"],"title_canon_sha256":"5ee09ada7f9d864d222bc5ea92a92fb5c5b61c2c899cdf3a11e360c182faeb5a","abstract_canon_sha256":"f94f57e0cfbb5596a72420c49acf003f11f1973e3e8f4ecdc78e4f99661b7188"},"schema_version":"1.0"},"canonical_sha256":"05c51ba8ef812a5eca7004412a993026776bbd0e7917541ed999232e736302d0","source":{"kind":"arxiv","id":"1208.2854","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"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:AXCRXKHPQEVF5STQARASVGJQEZ","target":"record","payload":{"canonical_record":{"source":{"id":"1208.2854","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2012-08-14T13:20:23Z","cross_cats_sorted":["cond-mat.stat-mech"],"title_canon_sha256":"5ee09ada7f9d864d222bc5ea92a92fb5c5b61c2c899cdf3a11e360c182faeb5a","abstract_canon_sha256":"f94f57e0cfbb5596a72420c49acf003f11f1973e3e8f4ecdc78e4f99661b7188"},"schema_version":"1.0"},"canonical_sha256":"05c51ba8ef812a5eca7004412a993026776bbd0e7917541ed999232e736302d0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:36:25.080337Z","signature_b64":"rPLLXhC9Inw/Yndp+8bRteXIN4P6tt4selKZWBXSNLdlMFzAZMiDaEHkD5cz+/dAliABs5NEGDunGRxlYqzDCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"05c51ba8ef812a5eca7004412a993026776bbd0e7917541ed999232e736302d0","last_reissued_at":"2026-05-18T03:36:25.079791Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:36:25.079791Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1208.2854","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:36:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"X1Cmtqrxbb0funP0UBEYPnKMWqzoBcSh1NdBqQXARG3EP/CDxUplmllskXn/8CswFz6GhPLS6/xKc44EdPYsAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T12:06:17.340021Z"},"content_sha256":"a218c71d05dab0fab32e842922d8341b9f07ce8c210b56038f24e1bb7c7c0d49","schema_version":"1.0","event_id":"sha256:a218c71d05dab0fab32e842922d8341b9f07ce8c210b56038f24e1bb7c7c0d49"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:AXCRXKHPQEVF5STQARASVGJQEZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Nambu monopoles interacting with lattice defects in two-dimensional artificial square spin ice","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.stat-mech"],"primary_cat":"cond-mat.mes-hall","authors_text":"A. R. Pereira, G. M. Wysin, L. A. S. M\\'ol, R. C. Silva, R. J. C. Lopes, W. A. Moura-Melo","submitted_at":"2012-08-14T13:20:23Z","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"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1208.2854","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:36:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"muyTizlE2eRSnoH/Xl5kOy0ifXbjPPjCe4KKtgc/Fcq6JrWaZ7GCEi3kXq+AZVYR3zF4bI/gIopG6Hn3MGIfAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T12:06:17.340387Z"},"content_sha256":"00a9b4679609ad145a84a0710df96e6cad84851e82ea5de1c49a6f24d4812afe","schema_version":"1.0","event_id":"sha256:00a9b4679609ad145a84a0710df96e6cad84851e82ea5de1c49a6f24d4812afe"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/AXCRXKHPQEVF5STQARASVGJQEZ/bundle.json","state_url":"https://pith.science/pith/AXCRXKHPQEVF5STQARASVGJQEZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/AXCRXKHPQEVF5STQARASVGJQEZ/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-01T12:06:17Z","links":{"resolver":"https://pith.science/pith/AXCRXKHPQEVF5STQARASVGJQEZ","bundle":"https://pith.science/pith/AXCRXKHPQEVF5STQARASVGJQEZ/bundle.json","state":"https://pith.science/pith/AXCRXKHPQEVF5STQARASVGJQEZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/AXCRXKHPQEVF5STQARASVGJQEZ/bundle.json"},"state":{"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"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0volUflRp+Wqn0IjP7WUmEjkkjfRMFQr6HiFs2qvmtlnHuLuiR6xEtdoNLNKQEB6vkE8csi6S1QX3btuj2iTDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T12:06:17.342371Z","bundle_sha256":"8359314f17c6cd7dcbb44831fa8b70d16ff7c6fe42e8486c53d9b521e1ac7aea"}}