{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1997:A3QLVUB5QFSN7YWGMO5CT472R2","short_pith_number":"pith:A3QLVUB5","canonical_record":{"source":{"id":"cond-mat/9707262","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat.str-el","submitted_at":"1997-07-25T04:13:06Z","cross_cats_sorted":["cond-mat.supr-con"],"title_canon_sha256":"df509084a2249d33d218273d1dfbda13050058e18906c0af26dee415707df0e3","abstract_canon_sha256":"335667c9350b265d862825b3165e8b454f44c32462dcab342737834cefb0a84c"},"schema_version":"1.0"},"canonical_sha256":"06e0bad03d8164dfe2c663ba29f3fa8ea833bead7b4a69ec37f5a6263259c9dc","source":{"kind":"arxiv","id":"cond-mat/9707262","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/9707262","created_at":"2026-05-18T01:07:07Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/9707262v1","created_at":"2026-05-18T01:07:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/9707262","created_at":"2026-05-18T01:07:07Z"},{"alias_kind":"pith_short_12","alias_value":"A3QLVUB5QFSN","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_16","alias_value":"A3QLVUB5QFSN7YWG","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_8","alias_value":"A3QLVUB5","created_at":"2026-05-18T12:25:48Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1997:A3QLVUB5QFSN7YWGMO5CT472R2","target":"record","payload":{"canonical_record":{"source":{"id":"cond-mat/9707262","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat.str-el","submitted_at":"1997-07-25T04:13:06Z","cross_cats_sorted":["cond-mat.supr-con"],"title_canon_sha256":"df509084a2249d33d218273d1dfbda13050058e18906c0af26dee415707df0e3","abstract_canon_sha256":"335667c9350b265d862825b3165e8b454f44c32462dcab342737834cefb0a84c"},"schema_version":"1.0"},"canonical_sha256":"06e0bad03d8164dfe2c663ba29f3fa8ea833bead7b4a69ec37f5a6263259c9dc","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:07:07.995673Z","signature_b64":"ChMq8jXQ+PMALmI8llFVY/4CIjFFP/VdCsAbmCMb/aPIc+FK5chw2osjQ5xQaB4Y0qWoB9MGZHQGpDrLOpMtAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"06e0bad03d8164dfe2c663ba29f3fa8ea833bead7b4a69ec37f5a6263259c9dc","last_reissued_at":"2026-05-18T01:07:07.995029Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:07:07.995029Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"cond-mat/9707262","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":"2026-05-18T01:07:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"b1ciW6pUnkKCdR4swx6yTOGEHSjv2cH7xkbvtQKElixJ2K0rnSvMTPECsKjvQHgcSjQCyBubA9c+v3uUG2sKCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T20:48:47.122096Z"},"content_sha256":"6daaacbfdd3910e82588eea4498da2a0a24111844a2e27a557cef1b85ba97496","schema_version":"1.0","event_id":"sha256:6daaacbfdd3910e82588eea4498da2a0a24111844a2e27a557cef1b85ba97496"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1997:A3QLVUB5QFSN7YWGMO5CT472R2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Bogoliubov quasiparticle spectra of the effective d-wave model for cuprate superconductivity","license":"","headline":"","cross_cats":["cond-mat.supr-con"],"primary_cat":"cond-mat.str-el","authors_text":"M. Yamaguchi, R. Eder, Y. Ohta","submitted_at":"1997-07-25T04:13:06Z","abstract_excerpt":"An exact-diagonalization technique on finite-size clusters is used to study the ground state and excitation spectra of the two-dimensional effective fermion model, a fictious model of hole quasiparticles derived from numerical studies of the two-dimensional t-J model at low doping. We show that there is actually a reasonable range of parameter values where the $d_{x^2-y^2}$-wave pairing of holes occurs and the low-lying excitation can be described by the picture of Bogoliubov quasiparticles in the BCS pairing theory. The gap parameter of a size $\\Delta_d\\simeq 0.13|V|$ (where $V$ is the attrac"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/9707262","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":"2026-05-18T01:07:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XWqnXThbf8rSu+HxIeQqi02g3cNrsl2Sv3aACj9MmJXDZDcfcMpLn7/R3T+y1WyBZ3mfOUFOvgQRoDF2rOBcBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T20:48:47.122725Z"},"content_sha256":"b388e9fdaacd39e40ff3ff8d6283816280dd38ab61e6da6498a5ab0d32e2685e","schema_version":"1.0","event_id":"sha256:b388e9fdaacd39e40ff3ff8d6283816280dd38ab61e6da6498a5ab0d32e2685e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/A3QLVUB5QFSN7YWGMO5CT472R2/bundle.json","state_url":"https://pith.science/pith/A3QLVUB5QFSN7YWGMO5CT472R2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/A3QLVUB5QFSN7YWGMO5CT472R2/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":"2026-05-27T20:48:47Z","links":{"resolver":"https://pith.science/pith/A3QLVUB5QFSN7YWGMO5CT472R2","bundle":"https://pith.science/pith/A3QLVUB5QFSN7YWGMO5CT472R2/bundle.json","state":"https://pith.science/pith/A3QLVUB5QFSN7YWGMO5CT472R2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/A3QLVUB5QFSN7YWGMO5CT472R2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1997:A3QLVUB5QFSN7YWGMO5CT472R2","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":"335667c9350b265d862825b3165e8b454f44c32462dcab342737834cefb0a84c","cross_cats_sorted":["cond-mat.supr-con"],"license":"","primary_cat":"cond-mat.str-el","submitted_at":"1997-07-25T04:13:06Z","title_canon_sha256":"df509084a2249d33d218273d1dfbda13050058e18906c0af26dee415707df0e3"},"schema_version":"1.0","source":{"id":"cond-mat/9707262","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/9707262","created_at":"2026-05-18T01:07:07Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/9707262v1","created_at":"2026-05-18T01:07:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/9707262","created_at":"2026-05-18T01:07:07Z"},{"alias_kind":"pith_short_12","alias_value":"A3QLVUB5QFSN","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_16","alias_value":"A3QLVUB5QFSN7YWG","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_8","alias_value":"A3QLVUB5","created_at":"2026-05-18T12:25:48Z"}],"graph_snapshots":[{"event_id":"sha256:b388e9fdaacd39e40ff3ff8d6283816280dd38ab61e6da6498a5ab0d32e2685e","target":"graph","created_at":"2026-05-18T01:07:07Z","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":"An exact-diagonalization technique on finite-size clusters is used to study the ground state and excitation spectra of the two-dimensional effective fermion model, a fictious model of hole quasiparticles derived from numerical studies of the two-dimensional t-J model at low doping. We show that there is actually a reasonable range of parameter values where the $d_{x^2-y^2}$-wave pairing of holes occurs and the low-lying excitation can be described by the picture of Bogoliubov quasiparticles in the BCS pairing theory. The gap parameter of a size $\\Delta_d\\simeq 0.13|V|$ (where $V$ is the attrac","authors_text":"M. Yamaguchi, R. Eder, Y. Ohta","cross_cats":["cond-mat.supr-con"],"headline":"","license":"","primary_cat":"cond-mat.str-el","submitted_at":"1997-07-25T04:13:06Z","title":"Bogoliubov quasiparticle spectra of the effective d-wave model for cuprate superconductivity"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/9707262","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":"sha256:6daaacbfdd3910e82588eea4498da2a0a24111844a2e27a557cef1b85ba97496","target":"record","created_at":"2026-05-18T01:07:07Z","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":"335667c9350b265d862825b3165e8b454f44c32462dcab342737834cefb0a84c","cross_cats_sorted":["cond-mat.supr-con"],"license":"","primary_cat":"cond-mat.str-el","submitted_at":"1997-07-25T04:13:06Z","title_canon_sha256":"df509084a2249d33d218273d1dfbda13050058e18906c0af26dee415707df0e3"},"schema_version":"1.0","source":{"id":"cond-mat/9707262","kind":"arxiv","version":1}},"canonical_sha256":"06e0bad03d8164dfe2c663ba29f3fa8ea833bead7b4a69ec37f5a6263259c9dc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"06e0bad03d8164dfe2c663ba29f3fa8ea833bead7b4a69ec37f5a6263259c9dc","first_computed_at":"2026-05-18T01:07:07.995029Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:07:07.995029Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ChMq8jXQ+PMALmI8llFVY/4CIjFFP/VdCsAbmCMb/aPIc+FK5chw2osjQ5xQaB4Y0qWoB9MGZHQGpDrLOpMtAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:07:07.995673Z","signed_message":"canonical_sha256_bytes"},"source_id":"cond-mat/9707262","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6daaacbfdd3910e82588eea4498da2a0a24111844a2e27a557cef1b85ba97496","sha256:b388e9fdaacd39e40ff3ff8d6283816280dd38ab61e6da6498a5ab0d32e2685e"],"state_sha256":"35cc513a38680f3d7651c0da343d0a56adc3068d721795ddab11a546e75fd929"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aEePbSWltQgOZ+h3hIypHyNP/0/6A7S/PPkX9hnBpFcNakRD8cH2pxPLyEk8QOD0IVi2JUJzJhrZkoUkf/gQBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T20:48:47.126123Z","bundle_sha256":"98c4dcda12e22a84cd5ef965a8ee69ca23e267e33bf6e9e7a0ad1d88343413be"}}