{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2001:5TL42ZANUVNQACJU2YEU4FR542","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":"4122c502409c334083adfb4f6f846e868cb5a1a1a15c333308135c61aa7bf842","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat.str-el","submitted_at":"2001-04-27T11:38:15Z","title_canon_sha256":"254f74b7b7d86a7f5476792e0af290b1aa9127281374bb083c9563ccdbc6e86a"},"schema_version":"1.0","source":{"id":"cond-mat/0104533","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/0104533","created_at":"2026-05-18T03:20:33Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/0104533v1","created_at":"2026-05-18T03:20:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/0104533","created_at":"2026-05-18T03:20:33Z"},{"alias_kind":"pith_short_12","alias_value":"5TL42ZANUVNQ","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"5TL42ZANUVNQACJU","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"5TL42ZAN","created_at":"2026-05-18T12:25:50Z"}],"graph_snapshots":[{"event_id":"sha256:167975b36f72cdafd221bc5a1c68cb78d9f74d6a658864ad51db8e9b90e90a7f","target":"graph","created_at":"2026-05-18T03:20:33Z","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":"Combining density-matrix and Lanczos algorithms we propose a new optimized phonon approach for finite-cluster diagonalizations of interacting electron-phonon systems. To illustrate the efficiency and reliability of our method, we investigate the problem of bipolaron band formation in the extended Holstein Hubbard model.","authors_text":"Alexander Wei{\\ss}e, Gerhard Wellein, Holger Fehske","cross_cats":[],"headline":"","license":"","primary_cat":"cond-mat.str-el","submitted_at":"2001-04-27T11:38:15Z","title":"Density-Matrix Algorithm for Phonon Hilbert Space Reduction in the Numerical Diagonalization of Quantum Many-Body Systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/0104533","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:ca96a0a5d847a8bda93e632ffeb51f1b1b79fa50c2c83eb28a94b2b5e5120826","target":"record","created_at":"2026-05-18T03:20:33Z","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":"4122c502409c334083adfb4f6f846e868cb5a1a1a15c333308135c61aa7bf842","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat.str-el","submitted_at":"2001-04-27T11:38:15Z","title_canon_sha256":"254f74b7b7d86a7f5476792e0af290b1aa9127281374bb083c9563ccdbc6e86a"},"schema_version":"1.0","source":{"id":"cond-mat/0104533","kind":"arxiv","version":1}},"canonical_sha256":"ecd7cd640da55b000934d6094e163de69c61e2db9194cd908d74a46065502d79","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ecd7cd640da55b000934d6094e163de69c61e2db9194cd908d74a46065502d79","first_computed_at":"2026-05-18T03:20:33.464293Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:20:33.464293Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6CzhSv51RksflMppd3RHlz9qIOUvNiY6VknDSP+Jkv2V5NvXMCvbWjW+B2ZX6ktvpwzf0DI/xQJ/6akFdrCYBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:20:33.465172Z","signed_message":"canonical_sha256_bytes"},"source_id":"cond-mat/0104533","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ca96a0a5d847a8bda93e632ffeb51f1b1b79fa50c2c83eb28a94b2b5e5120826","sha256:167975b36f72cdafd221bc5a1c68cb78d9f74d6a658864ad51db8e9b90e90a7f"],"state_sha256":"a90fa8a7fe7b1a4e1b2a6804083e5d4e19c4b77e4df394eca52226350bceb622"}