{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:FJOH6YSXWYN5IZ7KDBMDGPEDLM","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":"0c5cf192102a3f69f2ea78a6a40204b4546508223ad2c90b3e7fad4c285205e1","cross_cats_sorted":["cond-mat.mes-hall","cond-mat.supr-con"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2014-03-26T19:55:25Z","title_canon_sha256":"631c5e4105fa7ed4a438c6f6d27ea5ff1259110eec60b0ea98ed5b0f28e1a113"},"schema_version":"1.0","source":{"id":"1403.6818","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1403.6818","created_at":"2026-05-18T01:43:50Z"},{"alias_kind":"arxiv_version","alias_value":"1403.6818v2","created_at":"2026-05-18T01:43:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1403.6818","created_at":"2026-05-18T01:43:50Z"},{"alias_kind":"pith_short_12","alias_value":"FJOH6YSXWYN5","created_at":"2026-05-18T12:28:28Z"},{"alias_kind":"pith_short_16","alias_value":"FJOH6YSXWYN5IZ7K","created_at":"2026-05-18T12:28:28Z"},{"alias_kind":"pith_short_8","alias_value":"FJOH6YSX","created_at":"2026-05-18T12:28:28Z"}],"graph_snapshots":[{"event_id":"sha256:25978fd00cf921d6d9dbc5b2982a93debe7861a3a4eb2e39dab95d61d88c3b5b","target":"graph","created_at":"2026-05-18T01:43:50Z","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":"We present an extension of the pair coupled cluster doubles (p-CCD) method to quasiparticles and apply it to the attractive pairing Hamiltonian. Near the transition point where number symmetry gets spontaneously broken, the proposed BCS-based p-CCD method yields significantly better energies than existing methods when compared to exact results obtained via solution of the Richardson equations. The quasiparticle p-CCD method has a low computational cost of $\\mathcal{O}(N^3)$ as a function of system size. This together with the high quality of results here demonstrated, points to considerable pr","authors_text":"Angelo Signoracci, Gustavo E. Scuseria, Jorge Dukelsky, Thomas Duguet, Thomas M Henderson","cross_cats":["cond-mat.mes-hall","cond-mat.supr-con"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2014-03-26T19:55:25Z","title":"Quasiparticle Coupled Cluster Theory for Pairing Interactions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1403.6818","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":"sha256:730c30252dc5a819fbec70addc7684202105136d9c29e46884b2a515140a4b51","target":"record","created_at":"2026-05-18T01:43:50Z","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":"0c5cf192102a3f69f2ea78a6a40204b4546508223ad2c90b3e7fad4c285205e1","cross_cats_sorted":["cond-mat.mes-hall","cond-mat.supr-con"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2014-03-26T19:55:25Z","title_canon_sha256":"631c5e4105fa7ed4a438c6f6d27ea5ff1259110eec60b0ea98ed5b0f28e1a113"},"schema_version":"1.0","source":{"id":"1403.6818","kind":"arxiv","version":2}},"canonical_sha256":"2a5c7f6257b61bd467ea1858333c835b1b7a193fd1d672e0d0bbf403ede948c6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2a5c7f6257b61bd467ea1858333c835b1b7a193fd1d672e0d0bbf403ede948c6","first_computed_at":"2026-05-18T01:43:50.636223Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:43:50.636223Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"d5wq0MQKYY5x/lesB/RI/jGZKmF5ZCDf3ixdB3O0wzLwJL8SLZaD5vyJM0SBixUxNnC4VHWj4TQLurt62f/7Cw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:43:50.636958Z","signed_message":"canonical_sha256_bytes"},"source_id":"1403.6818","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:730c30252dc5a819fbec70addc7684202105136d9c29e46884b2a515140a4b51","sha256:25978fd00cf921d6d9dbc5b2982a93debe7861a3a4eb2e39dab95d61d88c3b5b"],"state_sha256":"3364780684a34b5799fe3830c5c0079d7ccda80d4c19712080b193c981aac0e7"}