{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:TSNZVXD3KW3QMLZVLKDZPMALM3","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":"c695256e4e6be8fe9537a50a703bea128e6e5020e7758b1e35c22d1fe5b83b34","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.stat-mech","submitted_at":"2012-05-27T14:49:12Z","title_canon_sha256":"3a6f22fd8b5b43228950664e2d76e03a75e6227592a08f352fdaf0ae324c2a06"},"schema_version":"1.0","source":{"id":"1205.5973","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1205.5973","created_at":"2026-05-18T02:21:09Z"},{"alias_kind":"arxiv_version","alias_value":"1205.5973v1","created_at":"2026-05-18T02:21:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1205.5973","created_at":"2026-05-18T02:21:09Z"},{"alias_kind":"pith_short_12","alias_value":"TSNZVXD3KW3Q","created_at":"2026-05-18T12:27:23Z"},{"alias_kind":"pith_short_16","alias_value":"TSNZVXD3KW3QMLZV","created_at":"2026-05-18T12:27:23Z"},{"alias_kind":"pith_short_8","alias_value":"TSNZVXD3","created_at":"2026-05-18T12:27:23Z"}],"graph_snapshots":[{"event_id":"sha256:d0bcb72af341599ce3a48b9f0ac5e1ef9be039397e9e66142fdfd6963ca41337","target":"graph","created_at":"2026-05-18T02:21:09Z","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":"I study a dimer model on the square lattice with nearest-neighbor exclusion as the only interaction. Detailed simulations using tomographic entropic sampling show that as the chemical potential is varied, there is a strongly discontinuous phase transition, at which the particle density jumps by about 18% of its maximum value, 1/4. The transition is accompanied by the onset of orientational order, to an arrangement corresponding to the {1/2,0,1/2} structure identified by Phares et al. [Physica B {\\bf 409}, 1096 (2011)] in a dimer model with {\\it finite} repulsion at {\\it fixed} density. Using f","authors_text":"Ronald Dickman","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.stat-mech","submitted_at":"2012-05-27T14:49:12Z","title":"Discontinuous phase transition in a dimer lattice gas"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1205.5973","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:c931ac930ed5e96d90aa9c24443201c185f5c6cf6f12dd3643ba83cc8ee86bfd","target":"record","created_at":"2026-05-18T02:21:09Z","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":"c695256e4e6be8fe9537a50a703bea128e6e5020e7758b1e35c22d1fe5b83b34","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.stat-mech","submitted_at":"2012-05-27T14:49:12Z","title_canon_sha256":"3a6f22fd8b5b43228950664e2d76e03a75e6227592a08f352fdaf0ae324c2a06"},"schema_version":"1.0","source":{"id":"1205.5973","kind":"arxiv","version":1}},"canonical_sha256":"9c9b9adc7b55b7062f355a8797b00b66db5d404c97ffa5ea2ec0e42b7a1fe372","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9c9b9adc7b55b7062f355a8797b00b66db5d404c97ffa5ea2ec0e42b7a1fe372","first_computed_at":"2026-05-18T02:21:09.359529Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:21:09.359529Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"J/5TVgctIowJpPws0nSzXxHhQZfvpzeh+8aXCBi+c+q1woxJY3kjQAJrN6IK2CrB6lqmjTONOCJuPyONqrdkBg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:21:09.359981Z","signed_message":"canonical_sha256_bytes"},"source_id":"1205.5973","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c931ac930ed5e96d90aa9c24443201c185f5c6cf6f12dd3643ba83cc8ee86bfd","sha256:d0bcb72af341599ce3a48b9f0ac5e1ef9be039397e9e66142fdfd6963ca41337"],"state_sha256":"876bfd242ce6b431d30becc862fde38bcc60586e57a80c2c2752aaaaddd9963e"}