{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:55WRL3ZUW75AKX447GGKLQTPQH","short_pith_number":"pith:55WRL3ZU","canonical_record":{"source":{"id":"0811.0214","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2008-11-03T03:14:25Z","cross_cats_sorted":["cond-mat.str-el"],"title_canon_sha256":"48212161375337d2546aca7f9e921e82ca6ab3c4d310a8d90556f716aa66e682","abstract_canon_sha256":"9c0bc4bab71902636f4986b25ca8c1bd44f3b39ab49f20894f9ea283fd8aa94e"},"schema_version":"1.0"},"canonical_sha256":"ef6d15ef34b7fa055f9cf98ca5c26f81fdbd7416fb3e338e4ebc2bfcde142647","source":{"kind":"arxiv","id":"0811.0214","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0811.0214","created_at":"2026-05-18T02:15:22Z"},{"alias_kind":"arxiv_version","alias_value":"0811.0214v1","created_at":"2026-05-18T02:15:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0811.0214","created_at":"2026-05-18T02:15:22Z"},{"alias_kind":"pith_short_12","alias_value":"55WRL3ZUW75A","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_16","alias_value":"55WRL3ZUW75AKX44","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_8","alias_value":"55WRL3ZU","created_at":"2026-05-18T12:25:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:55WRL3ZUW75AKX447GGKLQTPQH","target":"record","payload":{"canonical_record":{"source":{"id":"0811.0214","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2008-11-03T03:14:25Z","cross_cats_sorted":["cond-mat.str-el"],"title_canon_sha256":"48212161375337d2546aca7f9e921e82ca6ab3c4d310a8d90556f716aa66e682","abstract_canon_sha256":"9c0bc4bab71902636f4986b25ca8c1bd44f3b39ab49f20894f9ea283fd8aa94e"},"schema_version":"1.0"},"canonical_sha256":"ef6d15ef34b7fa055f9cf98ca5c26f81fdbd7416fb3e338e4ebc2bfcde142647","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:15:22.458958Z","signature_b64":"z18oap+0uRREByugCLYL2+eNKpZBXv+TFb8vSvwAzmogHmKk67gJI5mxd8lcf0EYF/tQ0C+TxRSmFID0RAlpBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ef6d15ef34b7fa055f9cf98ca5c26f81fdbd7416fb3e338e4ebc2bfcde142647","last_reissued_at":"2026-05-18T02:15:22.458347Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:15:22.458347Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0811.0214","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":"2026-05-18T02:15:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qxABMNFJxRc97/xEFqUvpveSMJYHQGSLorZEtWt1VXP8zt3LVXBwc7TMxaeVW/ysX/zpGDBaR2H5IE3S7V82Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T11:50:21.151810Z"},"content_sha256":"6142d770445e3458e6bccaacca386273783dfb0825976fa3fb0e20c45fafbe63","schema_version":"1.0","event_id":"sha256:6142d770445e3458e6bccaacca386273783dfb0825976fa3fb0e20c45fafbe63"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:55WRL3ZUW75AKX447GGKLQTPQH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Electronic polarons and bipolarons in Fe-based superconductors: a pairing mechanism","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.str-el"],"primary_cat":"cond-mat.supr-con","authors_text":"George A. Sawatzky, Ilya Elfimov, Mona Berciu","submitted_at":"2008-11-03T03:14:25Z","abstract_excerpt":"Superconductivity is a fascinating example of how \"more is different\". It is due to electrons binding into bosonic Cooper pairs, which exhibit coherent behavior across a macroscopic sample. Finding the mechanism responsible for this binding is one of the more difficult tasks of condensed matter physics. For conventional superconductors the solution was given by the BCS theory as being due to exchange of phonons. For the cuprate high-Tc superconductors a widely-accepted explanation is still missing despite intense effort. The recently discovered Fe-based high-Tc superconductors pose now a new c"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0811.0214","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":""},"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":"2026-05-18T02:15:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SKQpu9k+JYS5O6IeIbH7zW5ZgWFeBVh4kvmEsjfXtGylufRt5E+OEeSZ6FBgpqjx5ba+tULAvu97oasEzSv9AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T11:50:21.152151Z"},"content_sha256":"4a2b5cfda0e03f093a2ac34e73ee8f898a4a4af907dbe81461b832e52e2e0629","schema_version":"1.0","event_id":"sha256:4a2b5cfda0e03f093a2ac34e73ee8f898a4a4af907dbe81461b832e52e2e0629"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/55WRL3ZUW75AKX447GGKLQTPQH/bundle.json","state_url":"https://pith.science/pith/55WRL3ZUW75AKX447GGKLQTPQH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/55WRL3ZUW75AKX447GGKLQTPQH/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":"2026-05-28T11:50:21Z","links":{"resolver":"https://pith.science/pith/55WRL3ZUW75AKX447GGKLQTPQH","bundle":"https://pith.science/pith/55WRL3ZUW75AKX447GGKLQTPQH/bundle.json","state":"https://pith.science/pith/55WRL3ZUW75AKX447GGKLQTPQH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/55WRL3ZUW75AKX447GGKLQTPQH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:55WRL3ZUW75AKX447GGKLQTPQH","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":"9c0bc4bab71902636f4986b25ca8c1bd44f3b39ab49f20894f9ea283fd8aa94e","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2008-11-03T03:14:25Z","title_canon_sha256":"48212161375337d2546aca7f9e921e82ca6ab3c4d310a8d90556f716aa66e682"},"schema_version":"1.0","source":{"id":"0811.0214","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0811.0214","created_at":"2026-05-18T02:15:22Z"},{"alias_kind":"arxiv_version","alias_value":"0811.0214v1","created_at":"2026-05-18T02:15:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0811.0214","created_at":"2026-05-18T02:15:22Z"},{"alias_kind":"pith_short_12","alias_value":"55WRL3ZUW75A","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_16","alias_value":"55WRL3ZUW75AKX44","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_8","alias_value":"55WRL3ZU","created_at":"2026-05-18T12:25:56Z"}],"graph_snapshots":[{"event_id":"sha256:4a2b5cfda0e03f093a2ac34e73ee8f898a4a4af907dbe81461b832e52e2e0629","target":"graph","created_at":"2026-05-18T02:15:22Z","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":"Superconductivity is a fascinating example of how \"more is different\". It is due to electrons binding into bosonic Cooper pairs, which exhibit coherent behavior across a macroscopic sample. Finding the mechanism responsible for this binding is one of the more difficult tasks of condensed matter physics. For conventional superconductors the solution was given by the BCS theory as being due to exchange of phonons. For the cuprate high-Tc superconductors a widely-accepted explanation is still missing despite intense effort. The recently discovered Fe-based high-Tc superconductors pose now a new c","authors_text":"George A. Sawatzky, Ilya Elfimov, Mona Berciu","cross_cats":["cond-mat.str-el"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2008-11-03T03:14:25Z","title":"Electronic polarons and bipolarons in Fe-based superconductors: a pairing mechanism"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0811.0214","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":"sha256:6142d770445e3458e6bccaacca386273783dfb0825976fa3fb0e20c45fafbe63","target":"record","created_at":"2026-05-18T02:15:22Z","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":"9c0bc4bab71902636f4986b25ca8c1bd44f3b39ab49f20894f9ea283fd8aa94e","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2008-11-03T03:14:25Z","title_canon_sha256":"48212161375337d2546aca7f9e921e82ca6ab3c4d310a8d90556f716aa66e682"},"schema_version":"1.0","source":{"id":"0811.0214","kind":"arxiv","version":1}},"canonical_sha256":"ef6d15ef34b7fa055f9cf98ca5c26f81fdbd7416fb3e338e4ebc2bfcde142647","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ef6d15ef34b7fa055f9cf98ca5c26f81fdbd7416fb3e338e4ebc2bfcde142647","first_computed_at":"2026-05-18T02:15:22.458347Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:15:22.458347Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"z18oap+0uRREByugCLYL2+eNKpZBXv+TFb8vSvwAzmogHmKk67gJI5mxd8lcf0EYF/tQ0C+TxRSmFID0RAlpBg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:15:22.458958Z","signed_message":"canonical_sha256_bytes"},"source_id":"0811.0214","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6142d770445e3458e6bccaacca386273783dfb0825976fa3fb0e20c45fafbe63","sha256:4a2b5cfda0e03f093a2ac34e73ee8f898a4a4af907dbe81461b832e52e2e0629"],"state_sha256":"3ecb80258903ab36c558edf05a4d58942e2d8f93d7fc42df4bcf8c3655e0dc51"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xODnFlkT3nSP6iRL7PLWzUgdhDay5j2M+mTH83BDleFEmlJD9mtvSuoS1vFkqgK/5bOwPyxQWCjX65dWRFQNAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T11:50:21.154061Z","bundle_sha256":"699653af398a1dd32d7ba462e31720b5f59ecdc9def19c76ba2be8fa298d7da7"}}