{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:22CAGQHOMTJEVVB3VHN7JIVLNU","short_pith_number":"pith:22CAGQHO","canonical_record":{"source":{"id":"1510.06385","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-10-21T19:39:35Z","cross_cats_sorted":[],"title_canon_sha256":"8ed1976077e57de595edaf315a2b2e79d5285187c544e911c8ba157a264ddc31","abstract_canon_sha256":"02e7f67e2db445053111d3aa7fda9311c21e6ea73d8ed4d60f287fa77b701dab"},"schema_version":"1.0"},"canonical_sha256":"d6840340ee64d24ad43ba9dbf4a2ab6d283a7fb85f86250ec5fbd188f0b350ab","source":{"kind":"arxiv","id":"1510.06385","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.06385","created_at":"2026-05-18T01:15:52Z"},{"alias_kind":"arxiv_version","alias_value":"1510.06385v2","created_at":"2026-05-18T01:15:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.06385","created_at":"2026-05-18T01:15:52Z"},{"alias_kind":"pith_short_12","alias_value":"22CAGQHOMTJE","created_at":"2026-05-18T12:28:59Z"},{"alias_kind":"pith_short_16","alias_value":"22CAGQHOMTJEVVB3","created_at":"2026-05-18T12:28:59Z"},{"alias_kind":"pith_short_8","alias_value":"22CAGQHO","created_at":"2026-05-18T12:28:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:22CAGQHOMTJEVVB3VHN7JIVLNU","target":"record","payload":{"canonical_record":{"source":{"id":"1510.06385","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-10-21T19:39:35Z","cross_cats_sorted":[],"title_canon_sha256":"8ed1976077e57de595edaf315a2b2e79d5285187c544e911c8ba157a264ddc31","abstract_canon_sha256":"02e7f67e2db445053111d3aa7fda9311c21e6ea73d8ed4d60f287fa77b701dab"},"schema_version":"1.0"},"canonical_sha256":"d6840340ee64d24ad43ba9dbf4a2ab6d283a7fb85f86250ec5fbd188f0b350ab","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:15:52.236220Z","signature_b64":"pGYGfZw9Ty8dUdt/kdmnUSAXpz1S7I+PWa/jl7Cn8FmztqvHTf9VAPw5Xj1IpLge19rUD/ff7lZhgH4g2OSyBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d6840340ee64d24ad43ba9dbf4a2ab6d283a7fb85f86250ec5fbd188f0b350ab","last_reissued_at":"2026-05-18T01:15:52.235520Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:15:52.235520Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1510.06385","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":"2026-05-18T01:15:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4jnWnoLfNQXk2FKFbGvutNlY0BGm3CwIDbocwVFrv/As0+/KKRo3lFEH+/rdubOQrB0Ku8vEc7qN4rrVjajGAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T13:52:35.051714Z"},"content_sha256":"6f2fef48fc268146f3ab0bc685a5c585c16d163f4bc68111382073f9187212ce","schema_version":"1.0","event_id":"sha256:6f2fef48fc268146f3ab0bc685a5c585c16d163f4bc68111382073f9187212ce"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:22CAGQHOMTJEVVB3VHN7JIVLNU","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Reconfigurable spin wave band structure of artificial square spin ice","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"Ezio Iacocca, Olle Heinonen, Robert L. Stamps, Sebastian Gliga","submitted_at":"2015-10-21T19:39:35Z","abstract_excerpt":"Artificial square spin ices are structures composed of magnetic elements arranged on a geometrically frustrated lattice and located on the sites of a two-dimensional square lattice, such that there are four interacting magnetic elements at each vertex. Using a semi-analytical approach, we show that square spin ices exhibit a rich spin wave band structure that is tunable both by external magnetic fields and the configuration of individual elements. Internal degrees of freedom can give rise to equilibrium states with bent magnetization at the edges leading to characteristic excitations; in the p"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.06385","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":"2026-05-18T01:15:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7fx5/bbA1dUCxsRat8wmmiRfVRQVkA7wwsts7BLZjHXhr9mW0CfDabE14kV8ztq++6blSPqKKpo5HiUqYZjWAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T13:52:35.052368Z"},"content_sha256":"dc2059cba297a82bc08ae470bcc56ec4dd57212685fa4bedd74aa2cfc3b95d11","schema_version":"1.0","event_id":"sha256:dc2059cba297a82bc08ae470bcc56ec4dd57212685fa4bedd74aa2cfc3b95d11"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/22CAGQHOMTJEVVB3VHN7JIVLNU/bundle.json","state_url":"https://pith.science/pith/22CAGQHOMTJEVVB3VHN7JIVLNU/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/22CAGQHOMTJEVVB3VHN7JIVLNU/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":"2026-05-31T13:52:35Z","links":{"resolver":"https://pith.science/pith/22CAGQHOMTJEVVB3VHN7JIVLNU","bundle":"https://pith.science/pith/22CAGQHOMTJEVVB3VHN7JIVLNU/bundle.json","state":"https://pith.science/pith/22CAGQHOMTJEVVB3VHN7JIVLNU/state.json","well_known_bundle":"https://pith.science/.well-known/pith/22CAGQHOMTJEVVB3VHN7JIVLNU/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:22CAGQHOMTJEVVB3VHN7JIVLNU","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":"02e7f67e2db445053111d3aa7fda9311c21e6ea73d8ed4d60f287fa77b701dab","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-10-21T19:39:35Z","title_canon_sha256":"8ed1976077e57de595edaf315a2b2e79d5285187c544e911c8ba157a264ddc31"},"schema_version":"1.0","source":{"id":"1510.06385","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.06385","created_at":"2026-05-18T01:15:52Z"},{"alias_kind":"arxiv_version","alias_value":"1510.06385v2","created_at":"2026-05-18T01:15:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.06385","created_at":"2026-05-18T01:15:52Z"},{"alias_kind":"pith_short_12","alias_value":"22CAGQHOMTJE","created_at":"2026-05-18T12:28:59Z"},{"alias_kind":"pith_short_16","alias_value":"22CAGQHOMTJEVVB3","created_at":"2026-05-18T12:28:59Z"},{"alias_kind":"pith_short_8","alias_value":"22CAGQHO","created_at":"2026-05-18T12:28:59Z"}],"graph_snapshots":[{"event_id":"sha256:dc2059cba297a82bc08ae470bcc56ec4dd57212685fa4bedd74aa2cfc3b95d11","target":"graph","created_at":"2026-05-18T01:15:52Z","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":"Artificial square spin ices are structures composed of magnetic elements arranged on a geometrically frustrated lattice and located on the sites of a two-dimensional square lattice, such that there are four interacting magnetic elements at each vertex. Using a semi-analytical approach, we show that square spin ices exhibit a rich spin wave band structure that is tunable both by external magnetic fields and the configuration of individual elements. Internal degrees of freedom can give rise to equilibrium states with bent magnetization at the edges leading to characteristic excitations; in the p","authors_text":"Ezio Iacocca, Olle Heinonen, Robert L. Stamps, Sebastian Gliga","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-10-21T19:39:35Z","title":"Reconfigurable spin wave band structure of artificial square spin ice"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.06385","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":"sha256:6f2fef48fc268146f3ab0bc685a5c585c16d163f4bc68111382073f9187212ce","target":"record","created_at":"2026-05-18T01:15:52Z","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":"02e7f67e2db445053111d3aa7fda9311c21e6ea73d8ed4d60f287fa77b701dab","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-10-21T19:39:35Z","title_canon_sha256":"8ed1976077e57de595edaf315a2b2e79d5285187c544e911c8ba157a264ddc31"},"schema_version":"1.0","source":{"id":"1510.06385","kind":"arxiv","version":2}},"canonical_sha256":"d6840340ee64d24ad43ba9dbf4a2ab6d283a7fb85f86250ec5fbd188f0b350ab","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d6840340ee64d24ad43ba9dbf4a2ab6d283a7fb85f86250ec5fbd188f0b350ab","first_computed_at":"2026-05-18T01:15:52.235520Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:15:52.235520Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"pGYGfZw9Ty8dUdt/kdmnUSAXpz1S7I+PWa/jl7Cn8FmztqvHTf9VAPw5Xj1IpLge19rUD/ff7lZhgH4g2OSyBA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:15:52.236220Z","signed_message":"canonical_sha256_bytes"},"source_id":"1510.06385","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6f2fef48fc268146f3ab0bc685a5c585c16d163f4bc68111382073f9187212ce","sha256:dc2059cba297a82bc08ae470bcc56ec4dd57212685fa4bedd74aa2cfc3b95d11"],"state_sha256":"9c3600ed0136612be915b4b3759c905cb20afb36ed79357b69fc3bbf4a7a5c4c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qiBhqG+7yu4NcQ1+mPyd52L+j/Ew4b/QST51CGCiXxwliUGuV7qf8ISRIXLz6HbIF85twmfqewYt/tOrrr7ECQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T13:52:35.056735Z","bundle_sha256":"bad2eb84b822bf7f88b3713516d805d0e609d955b1bf5f483636b8893f520653"}}