{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:URFEY6YF2HBNVNJZEKYZ263XHM","short_pith_number":"pith:URFEY6YF","canonical_record":{"source":{"id":"2104.05295","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2021-04-12T08:58:30Z","cross_cats_sorted":[],"title_canon_sha256":"7c3519f733dfb062c9ac99b100d689c8dcc66cf53319caea05c12be1c8676ec5","abstract_canon_sha256":"1623f506330d819aa6193d53daa870dd48a0a476fc16d5e86c1681233f91f9d7"},"schema_version":"1.0"},"canonical_sha256":"a44a4c7b05d1c2dab53922b19d7b773b2b8eff39f0fc2039ad0b9d273f7e5992","source":{"kind":"arxiv","id":"2104.05295","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2104.05295","created_at":"2026-07-05T02:44:36Z"},{"alias_kind":"arxiv_version","alias_value":"2104.05295v1","created_at":"2026-07-05T02:44:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2104.05295","created_at":"2026-07-05T02:44:36Z"},{"alias_kind":"pith_short_12","alias_value":"URFEY6YF2HBN","created_at":"2026-07-05T02:44:36Z"},{"alias_kind":"pith_short_16","alias_value":"URFEY6YF2HBNVNJZ","created_at":"2026-07-05T02:44:36Z"},{"alias_kind":"pith_short_8","alias_value":"URFEY6YF","created_at":"2026-07-05T02:44:36Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:URFEY6YF2HBNVNJZEKYZ263XHM","target":"record","payload":{"canonical_record":{"source":{"id":"2104.05295","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2021-04-12T08:58:30Z","cross_cats_sorted":[],"title_canon_sha256":"7c3519f733dfb062c9ac99b100d689c8dcc66cf53319caea05c12be1c8676ec5","abstract_canon_sha256":"1623f506330d819aa6193d53daa870dd48a0a476fc16d5e86c1681233f91f9d7"},"schema_version":"1.0"},"canonical_sha256":"a44a4c7b05d1c2dab53922b19d7b773b2b8eff39f0fc2039ad0b9d273f7e5992","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:44:36.826366Z","signature_b64":"zTH2khsKp1IC1qyT+IjUi1p7KXRD+gjRFhJaBAElYFiUGEGva9pV3zmdogfr5Oc68MgkIiCt2x7Fj6pZat5oCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a44a4c7b05d1c2dab53922b19d7b773b2b8eff39f0fc2039ad0b9d273f7e5992","last_reissued_at":"2026-07-05T02:44:36.825841Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:44:36.825841Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2104.05295","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T02:44:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"B8+8J4McIr1A3jQuR5U4Jv/WNJEj0QwyVcbqeR2k4xi5csP1Tp2Jasnz99/2D/s3sr25mLDvFz3HSUi/ld0BBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T01:51:00.919042Z"},"content_sha256":"177fc547c1344621120ce0239bb3766d9c025c727aa2f1b6bdfe79c6801c577d","schema_version":"1.0","event_id":"sha256:177fc547c1344621120ce0239bb3766d9c025c727aa2f1b6bdfe79c6801c577d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:URFEY6YF2HBNVNJZEKYZ263XHM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Realization of quasicrystalline quadrupole topological insulators in electrical circuits","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"Bin Zhou, Bo Lv, Chao Zhao, Chunying Guan, Dong-Hui Xu, Guohua Dong, Huibin Tao, Jinhui Shi, Rui Chen, Rujiang Li, Yicheng Li, Ying Wang","submitted_at":"2021-04-12T08:58:30Z","abstract_excerpt":"Quadrupole topological insulators are a new class of topological insulators with quantized quadrupole moments, which support protected gapless corner states. The experimental demonstrations of quadrupole-topological insulators were reported in a series of artificial materials, such as photonic crystals, acoustic crystals, and electrical circuits. In all these cases, the underlying structures have discrete translational symmetry and thus are periodic. Here we experimentally realize two-dimensional aperiodic-quasicrystalline quadrupole-topological insulators by constructing them in electrical ci"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2104.05295","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2104.05295/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T02:44:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"m+K/7SiVnR1ysBguWXqrzLlP2GTfwpbYYQyrrQXG4fmHDsKHPL3denNMndeH1m3fRws5hsD5TcAva2ucf43ZCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T01:51:00.919547Z"},"content_sha256":"4dd4818b1a27f518c9f1b4f01c0a5fca41739d6fdaf44438fac7f977e3f8533a","schema_version":"1.0","event_id":"sha256:4dd4818b1a27f518c9f1b4f01c0a5fca41739d6fdaf44438fac7f977e3f8533a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/URFEY6YF2HBNVNJZEKYZ263XHM/bundle.json","state_url":"https://pith.science/pith/URFEY6YF2HBNVNJZEKYZ263XHM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/URFEY6YF2HBNVNJZEKYZ263XHM/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":"2026-08-11T01:51:00Z","links":{"resolver":"https://pith.science/pith/URFEY6YF2HBNVNJZEKYZ263XHM","bundle":"https://pith.science/pith/URFEY6YF2HBNVNJZEKYZ263XHM/bundle.json","state":"https://pith.science/pith/URFEY6YF2HBNVNJZEKYZ263XHM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/URFEY6YF2HBNVNJZEKYZ263XHM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:URFEY6YF2HBNVNJZEKYZ263XHM","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":"1623f506330d819aa6193d53daa870dd48a0a476fc16d5e86c1681233f91f9d7","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2021-04-12T08:58:30Z","title_canon_sha256":"7c3519f733dfb062c9ac99b100d689c8dcc66cf53319caea05c12be1c8676ec5"},"schema_version":"1.0","source":{"id":"2104.05295","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2104.05295","created_at":"2026-07-05T02:44:36Z"},{"alias_kind":"arxiv_version","alias_value":"2104.05295v1","created_at":"2026-07-05T02:44:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2104.05295","created_at":"2026-07-05T02:44:36Z"},{"alias_kind":"pith_short_12","alias_value":"URFEY6YF2HBN","created_at":"2026-07-05T02:44:36Z"},{"alias_kind":"pith_short_16","alias_value":"URFEY6YF2HBNVNJZ","created_at":"2026-07-05T02:44:36Z"},{"alias_kind":"pith_short_8","alias_value":"URFEY6YF","created_at":"2026-07-05T02:44:36Z"}],"graph_snapshots":[{"event_id":"sha256:4dd4818b1a27f518c9f1b4f01c0a5fca41739d6fdaf44438fac7f977e3f8533a","target":"graph","created_at":"2026-07-05T02:44:36Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2104.05295/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Quadrupole topological insulators are a new class of topological insulators with quantized quadrupole moments, which support protected gapless corner states. The experimental demonstrations of quadrupole-topological insulators were reported in a series of artificial materials, such as photonic crystals, acoustic crystals, and electrical circuits. In all these cases, the underlying structures have discrete translational symmetry and thus are periodic. Here we experimentally realize two-dimensional aperiodic-quasicrystalline quadrupole-topological insulators by constructing them in electrical ci","authors_text":"Bin Zhou, Bo Lv, Chao Zhao, Chunying Guan, Dong-Hui Xu, Guohua Dong, Huibin Tao, Jinhui Shi, Rui Chen, Rujiang Li, Yicheng Li, Ying Wang","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2021-04-12T08:58:30Z","title":"Realization of quasicrystalline quadrupole topological insulators in electrical circuits"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2104.05295","kind":"arxiv","version":1},"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":"sha256:177fc547c1344621120ce0239bb3766d9c025c727aa2f1b6bdfe79c6801c577d","target":"record","created_at":"2026-07-05T02:44:36Z","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":"1623f506330d819aa6193d53daa870dd48a0a476fc16d5e86c1681233f91f9d7","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2021-04-12T08:58:30Z","title_canon_sha256":"7c3519f733dfb062c9ac99b100d689c8dcc66cf53319caea05c12be1c8676ec5"},"schema_version":"1.0","source":{"id":"2104.05295","kind":"arxiv","version":1}},"canonical_sha256":"a44a4c7b05d1c2dab53922b19d7b773b2b8eff39f0fc2039ad0b9d273f7e5992","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a44a4c7b05d1c2dab53922b19d7b773b2b8eff39f0fc2039ad0b9d273f7e5992","first_computed_at":"2026-07-05T02:44:36.825841Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:44:36.825841Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"zTH2khsKp1IC1qyT+IjUi1p7KXRD+gjRFhJaBAElYFiUGEGva9pV3zmdogfr5Oc68MgkIiCt2x7Fj6pZat5oCQ==","signature_status":"signed_v1","signed_at":"2026-07-05T02:44:36.826366Z","signed_message":"canonical_sha256_bytes"},"source_id":"2104.05295","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:177fc547c1344621120ce0239bb3766d9c025c727aa2f1b6bdfe79c6801c577d","sha256:4dd4818b1a27f518c9f1b4f01c0a5fca41739d6fdaf44438fac7f977e3f8533a"],"state_sha256":"5aac7f9aac265bb723a1ade28b2de00bd3960b13e814c00063e72ce770cb9460"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sNrKo4AufGLbC2iT01DaEjpHgwA8a3P66wK/bICn60cjB9g2BMcjM5PVXN/iP15lgnMpE0upC6xbrZlwrs9AAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-11T01:51:00.925945Z","bundle_sha256":"5c200bec65e64beeac574bb4466369c34bc329758ae16204e2c6ac91bdcb1b92"}}