{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:KRR3Q22GE5HOE6QRNDDBFMBCHJ","short_pith_number":"pith:KRR3Q22G","canonical_record":{"source":{"id":"1205.6150","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2012-05-28T16:05:37Z","cross_cats_sorted":[],"title_canon_sha256":"f7b3f99d36129a2d913d312cd4c9751219a39d6c6ad389f897e0792869fc4adc","abstract_canon_sha256":"22eddcfc9ca40de486d9e835c4b0ca4a8a45d763972c76998a2372df4e33e130"},"schema_version":"1.0"},"canonical_sha256":"5463b86b46274ee27a1168c612b0223a4d7572fb503b92f25b53c400e8a99e89","source":{"kind":"arxiv","id":"1205.6150","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1205.6150","created_at":"2026-05-18T01:57:16Z"},{"alias_kind":"arxiv_version","alias_value":"1205.6150v2","created_at":"2026-05-18T01:57:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1205.6150","created_at":"2026-05-18T01:57:16Z"},{"alias_kind":"pith_short_12","alias_value":"KRR3Q22GE5HO","created_at":"2026-05-18T12:27:11Z"},{"alias_kind":"pith_short_16","alias_value":"KRR3Q22GE5HOE6QR","created_at":"2026-05-18T12:27:11Z"},{"alias_kind":"pith_short_8","alias_value":"KRR3Q22G","created_at":"2026-05-18T12:27:11Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:KRR3Q22GE5HOE6QRNDDBFMBCHJ","target":"record","payload":{"canonical_record":{"source":{"id":"1205.6150","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2012-05-28T16:05:37Z","cross_cats_sorted":[],"title_canon_sha256":"f7b3f99d36129a2d913d312cd4c9751219a39d6c6ad389f897e0792869fc4adc","abstract_canon_sha256":"22eddcfc9ca40de486d9e835c4b0ca4a8a45d763972c76998a2372df4e33e130"},"schema_version":"1.0"},"canonical_sha256":"5463b86b46274ee27a1168c612b0223a4d7572fb503b92f25b53c400e8a99e89","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:57:16.543343Z","signature_b64":"Hxdn49MHoC9A59D+zeyLI1b52GWu5EM07PvDk5n9pMs6hHTdt4p3xnwsmEivqaqXDsH2hRFxIgbOi9pj0U5zBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5463b86b46274ee27a1168c612b0223a4d7572fb503b92f25b53c400e8a99e89","last_reissued_at":"2026-05-18T01:57:16.542818Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:57:16.542818Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1205.6150","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":"2026-05-18T01:57:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Pqk8rBNhXvaZ7PC+spNVGI40AF9/Y95jderMnmbwrgbHQod7Fi26X/MH3G8j4h0RIlUjKvNd7PQIxRliuTgJBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T23:44:02.460076Z"},"content_sha256":"160795b838e5a0863791544addad344872098483e43cf55502d48b1a346fcf5f","schema_version":"1.0","event_id":"sha256:160795b838e5a0863791544addad344872098483e43cf55502d48b1a346fcf5f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:KRR3Q22GE5HOE6QRNDDBFMBCHJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spontaneous fourfold-symmetry breaking driven by electron-lattice coupling and strong correlations in high-$T_c$ cuprates","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"Nobuo Furukawa, Satoshi Okamoto","submitted_at":"2012-05-28T16:05:37Z","abstract_excerpt":"Using dynamical-mean-field theory for clusters, we study the two-dimensional Hubbard model in which electrons are coupled with the orthorhombic lattice distortions through the modulation in the hopping matrix. Instability towards spontaneous symmetry breaking from a tetragonal symmetric phase to an orthorhombic distorted phase is examined as a function of doping and interaction strength. A very strong instability is found in the underdoped pseudogap regime when the interaction strength is large enough to yield the Mott insulating phase at half filling. The symmetry breaking accompanies the rec"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1205.6150","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":"2026-05-18T01:57:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ADBZeM/ag9h284RK9M73paR6VSuewBdwuxnwSQrOAKCuK70G9On/anu12anbJVhIsd7hKH4npjE6r6v+lAEnDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T23:44:02.460496Z"},"content_sha256":"8b30b718c40f75e990c4178651b94364e5697b66979db977d9fd1b440192ad41","schema_version":"1.0","event_id":"sha256:8b30b718c40f75e990c4178651b94364e5697b66979db977d9fd1b440192ad41"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KRR3Q22GE5HOE6QRNDDBFMBCHJ/bundle.json","state_url":"https://pith.science/pith/KRR3Q22GE5HOE6QRNDDBFMBCHJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KRR3Q22GE5HOE6QRNDDBFMBCHJ/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":"2026-05-25T23:44:02Z","links":{"resolver":"https://pith.science/pith/KRR3Q22GE5HOE6QRNDDBFMBCHJ","bundle":"https://pith.science/pith/KRR3Q22GE5HOE6QRNDDBFMBCHJ/bundle.json","state":"https://pith.science/pith/KRR3Q22GE5HOE6QRNDDBFMBCHJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KRR3Q22GE5HOE6QRNDDBFMBCHJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:KRR3Q22GE5HOE6QRNDDBFMBCHJ","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":"22eddcfc9ca40de486d9e835c4b0ca4a8a45d763972c76998a2372df4e33e130","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2012-05-28T16:05:37Z","title_canon_sha256":"f7b3f99d36129a2d913d312cd4c9751219a39d6c6ad389f897e0792869fc4adc"},"schema_version":"1.0","source":{"id":"1205.6150","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1205.6150","created_at":"2026-05-18T01:57:16Z"},{"alias_kind":"arxiv_version","alias_value":"1205.6150v2","created_at":"2026-05-18T01:57:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1205.6150","created_at":"2026-05-18T01:57:16Z"},{"alias_kind":"pith_short_12","alias_value":"KRR3Q22GE5HO","created_at":"2026-05-18T12:27:11Z"},{"alias_kind":"pith_short_16","alias_value":"KRR3Q22GE5HOE6QR","created_at":"2026-05-18T12:27:11Z"},{"alias_kind":"pith_short_8","alias_value":"KRR3Q22G","created_at":"2026-05-18T12:27:11Z"}],"graph_snapshots":[{"event_id":"sha256:8b30b718c40f75e990c4178651b94364e5697b66979db977d9fd1b440192ad41","target":"graph","created_at":"2026-05-18T01:57:16Z","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":"Using dynamical-mean-field theory for clusters, we study the two-dimensional Hubbard model in which electrons are coupled with the orthorhombic lattice distortions through the modulation in the hopping matrix. Instability towards spontaneous symmetry breaking from a tetragonal symmetric phase to an orthorhombic distorted phase is examined as a function of doping and interaction strength. A very strong instability is found in the underdoped pseudogap regime when the interaction strength is large enough to yield the Mott insulating phase at half filling. The symmetry breaking accompanies the rec","authors_text":"Nobuo Furukawa, Satoshi Okamoto","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2012-05-28T16:05:37Z","title":"Spontaneous fourfold-symmetry breaking driven by electron-lattice coupling and strong correlations in high-$T_c$ cuprates"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1205.6150","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":"sha256:160795b838e5a0863791544addad344872098483e43cf55502d48b1a346fcf5f","target":"record","created_at":"2026-05-18T01:57:16Z","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":"22eddcfc9ca40de486d9e835c4b0ca4a8a45d763972c76998a2372df4e33e130","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2012-05-28T16:05:37Z","title_canon_sha256":"f7b3f99d36129a2d913d312cd4c9751219a39d6c6ad389f897e0792869fc4adc"},"schema_version":"1.0","source":{"id":"1205.6150","kind":"arxiv","version":2}},"canonical_sha256":"5463b86b46274ee27a1168c612b0223a4d7572fb503b92f25b53c400e8a99e89","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5463b86b46274ee27a1168c612b0223a4d7572fb503b92f25b53c400e8a99e89","first_computed_at":"2026-05-18T01:57:16.542818Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:57:16.542818Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Hxdn49MHoC9A59D+zeyLI1b52GWu5EM07PvDk5n9pMs6hHTdt4p3xnwsmEivqaqXDsH2hRFxIgbOi9pj0U5zBA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:57:16.543343Z","signed_message":"canonical_sha256_bytes"},"source_id":"1205.6150","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:160795b838e5a0863791544addad344872098483e43cf55502d48b1a346fcf5f","sha256:8b30b718c40f75e990c4178651b94364e5697b66979db977d9fd1b440192ad41"],"state_sha256":"5edaf878ce3a35a4f5ab9432a8bf0c2f9ce78c526d45579552cad9cf2bfec59e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nowcUzM1gcF/6695r2V6OJLp1g9MZNpg0NYoC+4FQsLXJmFWkBpbk6DUeb6YznpEMBlGZl45Iv/wKTFTCcL+Bg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T23:44:02.463519Z","bundle_sha256":"4950a6e5ba85e75f33b1e9f680905b3265287a450383de04c8a7fe2bb7af5be8"}}