{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:KKH4B32N7KH4NZFIGJZAXWONT7","short_pith_number":"pith:KKH4B32N","canonical_record":{"source":{"id":"2305.15625","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2023-05-25T00:21:35Z","cross_cats_sorted":["cond-mat.str-el","math.CO"],"title_canon_sha256":"769799a8b57019e30261dfb4ace7efe49d1872bee1bf106605a0ec3c1e05e75b","abstract_canon_sha256":"6235ebf26a0627728c7eaac30f704526a2f4ef86a30ad1f5b42afd32eae8c47b"},"schema_version":"1.0"},"canonical_sha256":"528fc0ef4dfa8fc6e4a832720bd9cd9ff2bf1583ba11fdb8970ffc432b55dad8","source":{"kind":"arxiv","id":"2305.15625","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2305.15625","created_at":"2026-07-05T06:13:42Z"},{"alias_kind":"arxiv_version","alias_value":"2305.15625v1","created_at":"2026-07-05T06:13:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2305.15625","created_at":"2026-07-05T06:13:42Z"},{"alias_kind":"pith_short_12","alias_value":"KKH4B32N7KH4","created_at":"2026-07-05T06:13:42Z"},{"alias_kind":"pith_short_16","alias_value":"KKH4B32N7KH4NZFI","created_at":"2026-07-05T06:13:42Z"},{"alias_kind":"pith_short_8","alias_value":"KKH4B32N","created_at":"2026-07-05T06:13:42Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:KKH4B32N7KH4NZFIGJZAXWONT7","target":"record","payload":{"canonical_record":{"source":{"id":"2305.15625","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2023-05-25T00:21:35Z","cross_cats_sorted":["cond-mat.str-el","math.CO"],"title_canon_sha256":"769799a8b57019e30261dfb4ace7efe49d1872bee1bf106605a0ec3c1e05e75b","abstract_canon_sha256":"6235ebf26a0627728c7eaac30f704526a2f4ef86a30ad1f5b42afd32eae8c47b"},"schema_version":"1.0"},"canonical_sha256":"528fc0ef4dfa8fc6e4a832720bd9cd9ff2bf1583ba11fdb8970ffc432b55dad8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T06:13:42.557440Z","signature_b64":"huW2Z+9JZK7ZXNKdTuaQu+KPDkJyWgIvndl+BwMyOqRySKRS7nxMn25Xq7cvjTj1PGGEmfBRgaZT2uigqdjuCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"528fc0ef4dfa8fc6e4a832720bd9cd9ff2bf1583ba11fdb8970ffc432b55dad8","last_reissued_at":"2026-07-05T06:13:42.557000Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T06:13:42.557000Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2305.15625","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":"2026-07-05T06:13:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SxwcBF5yJVmEj1ed8d+hYCq/evJ775E/tiXTgBLhB5FQsu+b0iIzjYyxYRlIIjUaXRRtMD3ze5n6QrQ5TtnGAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T21:53:43.316703Z"},"content_sha256":"be4983998540079dc87f6709a81a6aed6986d4b47fc68beae3f3a795fc3b02f8","schema_version":"1.0","event_id":"sha256:be4983998540079dc87f6709a81a6aed6986d4b47fc68beae3f3a795fc3b02f8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:KKH4B32N7KH4NZFIGJZAXWONT7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Unified Graph-Theoretic Framework for Free-Fermion Solvability","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.str-el","math.CO"],"primary_cat":"quant-ph","authors_text":"Adrian Chapman, Ryan L. Mann, Samuel J. Elman","submitted_at":"2023-05-25T00:21:35Z","abstract_excerpt":"We show that a quantum spin system has an exact description by non-interacting fermions if its frustration graph is claw-free and contains a simplicial clique. The frustration graph of a spin model captures the pairwise anticommutation relations between Pauli terms of its Hamiltonian in a given basis. This result captures a vast family of known free-fermion solutions. In previous work, it was shown that a free-fermion solution exists if the frustration graph is either a line graph, or (even-hole, claw)-free. The former case generalizes the celebrated Jordan-Wigner transformation and includes t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2305.15625","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/2305.15625/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":"2026-07-05T06:13:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"chRqEck07M0V5IxqHvR9g/8e21pVwA6O1meqI61li6lQNViXzvwyJ2yKt/MyRuV54rAE06FFA1H6G08p1/h4BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T21:53:43.317220Z"},"content_sha256":"df99706f22f0ac6a7ea9514f9ff1c93323dc3cddf690f05d73dab00e89f58f75","schema_version":"1.0","event_id":"sha256:df99706f22f0ac6a7ea9514f9ff1c93323dc3cddf690f05d73dab00e89f58f75"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KKH4B32N7KH4NZFIGJZAXWONT7/bundle.json","state_url":"https://pith.science/pith/KKH4B32N7KH4NZFIGJZAXWONT7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KKH4B32N7KH4NZFIGJZAXWONT7/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":"2026-08-04T21:53:43Z","links":{"resolver":"https://pith.science/pith/KKH4B32N7KH4NZFIGJZAXWONT7","bundle":"https://pith.science/pith/KKH4B32N7KH4NZFIGJZAXWONT7/bundle.json","state":"https://pith.science/pith/KKH4B32N7KH4NZFIGJZAXWONT7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KKH4B32N7KH4NZFIGJZAXWONT7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:KKH4B32N7KH4NZFIGJZAXWONT7","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":"6235ebf26a0627728c7eaac30f704526a2f4ef86a30ad1f5b42afd32eae8c47b","cross_cats_sorted":["cond-mat.str-el","math.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2023-05-25T00:21:35Z","title_canon_sha256":"769799a8b57019e30261dfb4ace7efe49d1872bee1bf106605a0ec3c1e05e75b"},"schema_version":"1.0","source":{"id":"2305.15625","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2305.15625","created_at":"2026-07-05T06:13:42Z"},{"alias_kind":"arxiv_version","alias_value":"2305.15625v1","created_at":"2026-07-05T06:13:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2305.15625","created_at":"2026-07-05T06:13:42Z"},{"alias_kind":"pith_short_12","alias_value":"KKH4B32N7KH4","created_at":"2026-07-05T06:13:42Z"},{"alias_kind":"pith_short_16","alias_value":"KKH4B32N7KH4NZFI","created_at":"2026-07-05T06:13:42Z"},{"alias_kind":"pith_short_8","alias_value":"KKH4B32N","created_at":"2026-07-05T06:13:42Z"}],"graph_snapshots":[{"event_id":"sha256:df99706f22f0ac6a7ea9514f9ff1c93323dc3cddf690f05d73dab00e89f58f75","target":"graph","created_at":"2026-07-05T06:13:42Z","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/2305.15625/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We show that a quantum spin system has an exact description by non-interacting fermions if its frustration graph is claw-free and contains a simplicial clique. The frustration graph of a spin model captures the pairwise anticommutation relations between Pauli terms of its Hamiltonian in a given basis. This result captures a vast family of known free-fermion solutions. In previous work, it was shown that a free-fermion solution exists if the frustration graph is either a line graph, or (even-hole, claw)-free. The former case generalizes the celebrated Jordan-Wigner transformation and includes t","authors_text":"Adrian Chapman, Ryan L. Mann, Samuel J. Elman","cross_cats":["cond-mat.str-el","math.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2023-05-25T00:21:35Z","title":"A Unified Graph-Theoretic Framework for Free-Fermion Solvability"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2305.15625","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:be4983998540079dc87f6709a81a6aed6986d4b47fc68beae3f3a795fc3b02f8","target":"record","created_at":"2026-07-05T06:13:42Z","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":"6235ebf26a0627728c7eaac30f704526a2f4ef86a30ad1f5b42afd32eae8c47b","cross_cats_sorted":["cond-mat.str-el","math.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2023-05-25T00:21:35Z","title_canon_sha256":"769799a8b57019e30261dfb4ace7efe49d1872bee1bf106605a0ec3c1e05e75b"},"schema_version":"1.0","source":{"id":"2305.15625","kind":"arxiv","version":1}},"canonical_sha256":"528fc0ef4dfa8fc6e4a832720bd9cd9ff2bf1583ba11fdb8970ffc432b55dad8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"528fc0ef4dfa8fc6e4a832720bd9cd9ff2bf1583ba11fdb8970ffc432b55dad8","first_computed_at":"2026-07-05T06:13:42.557000Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T06:13:42.557000Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"huW2Z+9JZK7ZXNKdTuaQu+KPDkJyWgIvndl+BwMyOqRySKRS7nxMn25Xq7cvjTj1PGGEmfBRgaZT2uigqdjuCg==","signature_status":"signed_v1","signed_at":"2026-07-05T06:13:42.557440Z","signed_message":"canonical_sha256_bytes"},"source_id":"2305.15625","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:be4983998540079dc87f6709a81a6aed6986d4b47fc68beae3f3a795fc3b02f8","sha256:df99706f22f0ac6a7ea9514f9ff1c93323dc3cddf690f05d73dab00e89f58f75"],"state_sha256":"18214106bc85d9c49e1f2d532d7e5a4072ebe6ced4dc8eda04fc572053f07910"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"x+7o/ZntoIBMMlFClxCoE81LQL/1qV7yKzNKq5WsezJ5BRg9Hlq18v5PaNI69vhahhHtxaNywq9VIOEndZnCBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T21:53:43.340822Z","bundle_sha256":"0b83f881b5db4fef9cf596f41cd5465fe85868622d044a61b06c9b6a8cb0a5f9"}}