{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:J62NCD3REX6N2IMG46VMTL25RK","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":"8c66ec278a0ee15a8d86dd3bad49941577fc9a3feb558a760f2226f469e8c06f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2019-05-14T20:53:18Z","title_canon_sha256":"8c611500c30daca4196800511510a7aaf2ef44621ef6497a127aeed790a59476"},"schema_version":"1.0","source":{"id":"1905.05838","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.05838","created_at":"2026-05-17T23:46:08Z"},{"alias_kind":"arxiv_version","alias_value":"1905.05838v1","created_at":"2026-05-17T23:46:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.05838","created_at":"2026-05-17T23:46:08Z"},{"alias_kind":"pith_short_12","alias_value":"J62NCD3REX6N","created_at":"2026-05-18T12:33:18Z"},{"alias_kind":"pith_short_16","alias_value":"J62NCD3REX6N2IMG","created_at":"2026-05-18T12:33:18Z"},{"alias_kind":"pith_short_8","alias_value":"J62NCD3R","created_at":"2026-05-18T12:33:18Z"}],"graph_snapshots":[{"event_id":"sha256:f8a5999b100cfc0f3682dd59739cbd2024926d3ca979463c1b4ae35154e4e7a6","target":"graph","created_at":"2026-05-17T23:46:08Z","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 study the infinite-U Hubbard model on ladders of 2, 4 and 6 legs with nearest (t) and next-nearest (t') neighbor hoppings by means of the density-matrix renormalization group algorithm. In particular, we analyze the stability of the Nagaoka state for several values of t' when we vary the electron density $(\\rho)$ from half-filling to the low-density limit. We build the two-dimensional phase diagram, where the fully spin-polarized and paramagnetic states prevail. We find that the inclusion of a non-frustrating next nearest neighbor hopping stabilizes the fully spin-polarized phase up until |","authors_text":"F. T. Lisandrini, G. G. Blesio, M. G. Gonzalez","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2019-05-14T20:53:18Z","title":"Magnetic phase diagram of the infinite-U Hubbard model with nearest- and next nearest-neighbor hoppings"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.05838","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":"sha256:1da1a1fcb1df42c63607ef827867a61ead2efe2e658eea4927c01d7b1c29c7ff","target":"record","created_at":"2026-05-17T23:46:08Z","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":"8c66ec278a0ee15a8d86dd3bad49941577fc9a3feb558a760f2226f469e8c06f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2019-05-14T20:53:18Z","title_canon_sha256":"8c611500c30daca4196800511510a7aaf2ef44621ef6497a127aeed790a59476"},"schema_version":"1.0","source":{"id":"1905.05838","kind":"arxiv","version":1}},"canonical_sha256":"4fb4d10f7125fcdd2186e7aac9af5d8aaaa15b821ca9db1fcb53bb867a670d8b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4fb4d10f7125fcdd2186e7aac9af5d8aaaa15b821ca9db1fcb53bb867a670d8b","first_computed_at":"2026-05-17T23:46:08.389921Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:46:08.389921Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"kRAgiUSwj4VwvsbXohqDVKXixM2O+U3fql0F2wSInk7IMPGhwUNmny/CE6DtOsL6nBgQRpxMDeI8lfh5Q3ZdDw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:46:08.390551Z","signed_message":"canonical_sha256_bytes"},"source_id":"1905.05838","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1da1a1fcb1df42c63607ef827867a61ead2efe2e658eea4927c01d7b1c29c7ff","sha256:f8a5999b100cfc0f3682dd59739cbd2024926d3ca979463c1b4ae35154e4e7a6"],"state_sha256":"5ff624dc2088b6bf1a91ccbbeec54033bdaaa7373ab541021d200bbb1b51339d"}