{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1997:WPORO4V4QOAJC4CPF7GPQLW5XN","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":"f141fd373b40ff45f29275c50c079d657ca70f7e9439448b6fdb86a959925a12","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat","submitted_at":"1997-10-06T22:51:06Z","title_canon_sha256":"cdcee0e30fc4d5d027d3875ae729a8afb32975559ed8adac54a8d4b57d7c9596"},"schema_version":"1.0","source":{"id":"cond-mat/9710058","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/9710058","created_at":"2026-07-04T16:04:18Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/9710058v1","created_at":"2026-07-04T16:04:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/9710058","created_at":"2026-07-04T16:04:18Z"},{"alias_kind":"pith_short_12","alias_value":"WPORO4V4QOAJ","created_at":"2026-07-04T16:04:18Z"},{"alias_kind":"pith_short_16","alias_value":"WPORO4V4QOAJC4CP","created_at":"2026-07-04T16:04:18Z"},{"alias_kind":"pith_short_8","alias_value":"WPORO4V4","created_at":"2026-07-04T16:04:18Z"}],"graph_snapshots":[{"event_id":"sha256:e4d643c7f50565faac719328ec9d0829612287874c5e2482a91e332f20875031","target":"graph","created_at":"2026-07-04T16:04:18Z","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/cond-mat/9710058/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We propose a new density matrix renormalization group (DMRG) approach to study lattices including bosons. The key to the new approach is an exact mapping of a boson site containing 2^N states to N pseudo-sites, each with 2 states. The pseudo-sites can be viewed as the binary digits of a boson level. We apply the pseudo-site DMRG method to the polaron problem in the one- and two-dimensional Holstein models. Ground state results are presented for a wide range of electron-phonon coupling strengths and phonon frequencies on lattices large enough (up to 80 sites in one dimension and up to 20x20 sit","authors_text":"Eric Jeckelmann, Irvine), Steven R. White (University of California","cross_cats":[],"headline":"","license":"","primary_cat":"cond-mat","submitted_at":"1997-10-06T22:51:06Z","title":"Density matrix renormalization group study of the polaron problem in the Holstein model"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/9710058","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":"sha256:38c74e9bc9f2a2d459d4ff60046739e9dfdc71e16bdb2206e9020ffcc9ee5b9a","target":"record","created_at":"2026-07-04T16:04:18Z","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":"f141fd373b40ff45f29275c50c079d657ca70f7e9439448b6fdb86a959925a12","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat","submitted_at":"1997-10-06T22:51:06Z","title_canon_sha256":"cdcee0e30fc4d5d027d3875ae729a8afb32975559ed8adac54a8d4b57d7c9596"},"schema_version":"1.0","source":{"id":"cond-mat/9710058","kind":"arxiv","version":1}},"canonical_sha256":"b3dd1772bc838091704f2fccf82eddbb5a867c8197ac74a18fca8e9cd123c604","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b3dd1772bc838091704f2fccf82eddbb5a867c8197ac74a18fca8e9cd123c604","first_computed_at":"2026-07-04T16:04:18.071749Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:04:18.071749Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"DzkGiyZoXuQWiQjS+o9r57uo7fz/4kbs5wbkdsesxguY6+q4o4CxD9UtgYqT+QBr0jy0mB3Z8KI1Q3yA/UkMAg==","signature_status":"signed_v1","signed_at":"2026-07-04T16:04:18.072080Z","signed_message":"canonical_sha256_bytes"},"source_id":"cond-mat/9710058","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:38c74e9bc9f2a2d459d4ff60046739e9dfdc71e16bdb2206e9020ffcc9ee5b9a","sha256:e4d643c7f50565faac719328ec9d0829612287874c5e2482a91e332f20875031"],"state_sha256":"77aa8c37cc375580aad31332fc197ad99370275f4965dc1281564ba2d5f9633f"}