{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:LOZ24NNDDUXDLM3EPU3H3EWERI","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":"49779965295dd8ad56ed6e2aee206922337e50c2754b4b5c41c53e8b9f6886dd","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.str-el","submitted_at":"2026-01-25T06:43:48Z","title_canon_sha256":"b97c653b57e234f4146ab82e8c3d795d92af4dc80a87165cf0bac6b105f0c78d"},"schema_version":"1.0","source":{"id":"2601.17718","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2601.17718","created_at":"2026-05-26T01:03:23Z"},{"alias_kind":"arxiv_version","alias_value":"2601.17718v2","created_at":"2026-05-26T01:03:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2601.17718","created_at":"2026-05-26T01:03:23Z"},{"alias_kind":"pith_short_12","alias_value":"LOZ24NNDDUXD","created_at":"2026-05-26T01:03:23Z"},{"alias_kind":"pith_short_16","alias_value":"LOZ24NNDDUXDLM3E","created_at":"2026-05-26T01:03:23Z"},{"alias_kind":"pith_short_8","alias_value":"LOZ24NND","created_at":"2026-05-26T01:03:23Z"}],"graph_snapshots":[{"event_id":"sha256:5a81c0e3b3d71317b5b574810d284024ec121ac305feeb02e4e0b1106fcb5b9c","target":"graph","created_at":"2026-05-26T01:03:23Z","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/2601.17718/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We introduce a tree tensor network (TTN) impurity solver that enables highly efficient and accurate real-time simulations of quantum impurity models. By decomposing a noninteracting bath Hamiltonian into a Cayley tree, the method provides a tensor network representation that naturally captures the multiscale entanglement structure intrinsic to impurity-bath systems. This geometry differs from conventional chain-based mappings and yields a substantial reduction of entanglement, allowing accurate ground-state properties and long-time dynamics to be captured at significantly lower bond dimensions","authors_text":"Bo Zhan, Jia-lin Chen, Tao Xiang, Zhen Fan","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.str-el","submitted_at":"2026-01-25T06:43:48Z","title":"Tree tensor network impurity solver based on Cayley-tree mapping"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2601.17718","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:ae61b8dc6797e48e6b0c1abe0123fed6f65cf0350213748bc87c6f58090ba2b6","target":"record","created_at":"2026-05-26T01:03:23Z","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":"49779965295dd8ad56ed6e2aee206922337e50c2754b4b5c41c53e8b9f6886dd","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.str-el","submitted_at":"2026-01-25T06:43:48Z","title_canon_sha256":"b97c653b57e234f4146ab82e8c3d795d92af4dc80a87165cf0bac6b105f0c78d"},"schema_version":"1.0","source":{"id":"2601.17718","kind":"arxiv","version":2}},"canonical_sha256":"5bb3ae35a31d2e35b3647d367d92c48a30799603c81551acf393a7e4107a4b17","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5bb3ae35a31d2e35b3647d367d92c48a30799603c81551acf393a7e4107a4b17","first_computed_at":"2026-05-26T01:03:23.108856Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-26T01:03:23.108856Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fE9HWYwo+f3Ryr66W1ymNvMTGPoDO7BO0FShyALUtZvCDHdZAv8nJIuerpTKIosmhMBOVzb9tHw0DYMfuDdmAw==","signature_status":"signed_v1","signed_at":"2026-05-26T01:03:23.109801Z","signed_message":"canonical_sha256_bytes"},"source_id":"2601.17718","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ae61b8dc6797e48e6b0c1abe0123fed6f65cf0350213748bc87c6f58090ba2b6","sha256:5a81c0e3b3d71317b5b574810d284024ec121ac305feeb02e4e0b1106fcb5b9c"],"state_sha256":"79cb036044cf3219735d1255c3558932dfa10aa298379941b383950f51c03f1a"}