{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:JSQ6W62TGRGUAHZZJVNLGNJK37","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":"3e6e1b8589878e123bd6aebabda0f226064d29e6567e97ba8aeb3c1300b19397","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2009-11-06T10:35:15Z","title_canon_sha256":"92a3d93c3cbfa40b437c32251e6a998d313621439679ab203aeea670feb25d0b"},"schema_version":"1.0","source":{"id":"0911.1216","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0911.1216","created_at":"2026-05-18T02:10:58Z"},{"alias_kind":"arxiv_version","alias_value":"0911.1216v2","created_at":"2026-05-18T02:10:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0911.1216","created_at":"2026-05-18T02:10:58Z"},{"alias_kind":"pith_short_12","alias_value":"JSQ6W62TGRGU","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"JSQ6W62TGRGUAHZZ","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"JSQ6W62T","created_at":"2026-05-18T12:26:00Z"}],"graph_snapshots":[{"event_id":"sha256:3e957b1c706582880aea3a9be8468fe1e4974b353591b243b8d0c33653e91b67","target":"graph","created_at":"2026-05-18T02:10:58Z","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 impact of the diagonal frustrating couplings on the quantum phase diagram of a two-leg ladder composed of alternating spin-1 and spin-1/2 rungs. As the coupling strength is increased the system successively exhibits two gapped paramagnetic phases (a rung-singlet and a Haldane-like non-degenerate states) and two ferrimagnetic phases with different ferromagnetic moments per rung. The first two states are similar to the phases studied in the frustrated spin-1/2 ladder, whereas the magnetic phases appear as a result of the mixed-spin structure of the model. A detailed characterization","authors_text":"J. Richter, N. B. Ivanov, V. Ravi Chandra","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2009-11-06T10:35:15Z","title":"Frustrated spin ladder with alternating spin-1 and spin-1/2 rungs"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0911.1216","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:a75327b58373bedc9de1f6cf306bd8c6bb288a10da80e21b79d5be1a7e2d37f9","target":"record","created_at":"2026-05-18T02:10:58Z","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":"3e6e1b8589878e123bd6aebabda0f226064d29e6567e97ba8aeb3c1300b19397","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2009-11-06T10:35:15Z","title_canon_sha256":"92a3d93c3cbfa40b437c32251e6a998d313621439679ab203aeea670feb25d0b"},"schema_version":"1.0","source":{"id":"0911.1216","kind":"arxiv","version":2}},"canonical_sha256":"4ca1eb7b53344d401f394d5ab3352adfe6ff28a331568a368032216c1c99baff","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4ca1eb7b53344d401f394d5ab3352adfe6ff28a331568a368032216c1c99baff","first_computed_at":"2026-05-18T02:10:58.889461Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:10:58.889461Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"SSLcknBXtUZPxFRsEAIJEAlhxWfBsWVEwGzU05sMIlxbmOq7M+ZZT6ADIB3Kz4cViQstBaYq9gR80xh+yMP0Aw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:10:58.890198Z","signed_message":"canonical_sha256_bytes"},"source_id":"0911.1216","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a75327b58373bedc9de1f6cf306bd8c6bb288a10da80e21b79d5be1a7e2d37f9","sha256:3e957b1c706582880aea3a9be8468fe1e4974b353591b243b8d0c33653e91b67"],"state_sha256":"27d0e02b1ce555c4b40d0c9397def86cacc771226b071f0295045372d9da2dd5"}