{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:5M4RHFCYZZIT3SUPWTW7XO6A3E","short_pith_number":"pith:5M4RHFCY","canonical_record":{"source":{"id":"1805.10598","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.stat-mech","submitted_at":"2018-05-27T08:37:52Z","cross_cats_sorted":["cond-mat.str-el"],"title_canon_sha256":"5d0a38eea88f1259174d04b079af8cee561beaada2ef3c8acc4ff7e19e430bdb","abstract_canon_sha256":"14b8879f8efd082d57d292614eaa4eed42361d8ef65371555106528eee1b290b"},"schema_version":"1.0"},"canonical_sha256":"eb39139458ce513dca8fb4edfbbbc0d903787f5b7e72a6efc980e8b908d4799c","source":{"kind":"arxiv","id":"1805.10598","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1805.10598","created_at":"2026-05-18T00:01:29Z"},{"alias_kind":"arxiv_version","alias_value":"1805.10598v1","created_at":"2026-05-18T00:01:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.10598","created_at":"2026-05-18T00:01:29Z"},{"alias_kind":"pith_short_12","alias_value":"5M4RHFCYZZIT","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_16","alias_value":"5M4RHFCYZZIT3SUP","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_8","alias_value":"5M4RHFCY","created_at":"2026-05-18T12:32:08Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:5M4RHFCYZZIT3SUPWTW7XO6A3E","target":"record","payload":{"canonical_record":{"source":{"id":"1805.10598","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.stat-mech","submitted_at":"2018-05-27T08:37:52Z","cross_cats_sorted":["cond-mat.str-el"],"title_canon_sha256":"5d0a38eea88f1259174d04b079af8cee561beaada2ef3c8acc4ff7e19e430bdb","abstract_canon_sha256":"14b8879f8efd082d57d292614eaa4eed42361d8ef65371555106528eee1b290b"},"schema_version":"1.0"},"canonical_sha256":"eb39139458ce513dca8fb4edfbbbc0d903787f5b7e72a6efc980e8b908d4799c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:01:29.474636Z","signature_b64":"uElTEIeMbKy+EuAf1lhHbA6tEE6HUiMmENaoieGZJ/Ea9/VScAV4f+DPDQHvrX6Al+hR8qsAuOe602so7/wDCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"eb39139458ce513dca8fb4edfbbbc0d903787f5b7e72a6efc980e8b908d4799c","last_reissued_at":"2026-05-18T00:01:29.474206Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:01:29.474206Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1805.10598","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:01:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NClcr3z0pGt8PyuglMQ9NixtOQIFGgmZWCsygfUV3Nt6QETwoucsd1F6EfKXok/tISkgBH5xABF0VTVcsGLEBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T12:24:00.860210Z"},"content_sha256":"d979d48be6202e3a430560f05e201f382a90ee0115b2fb417045b924bd45d640","schema_version":"1.0","event_id":"sha256:d979d48be6202e3a430560f05e201f382a90ee0115b2fb417045b924bd45d640"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:5M4RHFCYZZIT3SUPWTW7XO6A3E","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Residual entropies for three-dimensional frustrated spin systems with tensor networks","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.str-el"],"primary_cat":"cond-mat.stat-mech","authors_text":"Bram Vanhecke, Frank Verstraete, Laurens Vanderstraeten","submitted_at":"2018-05-27T08:37:52Z","abstract_excerpt":"We develop a technique for calculating three-dimensional classical partition functions using projected entangled-pair states (PEPS). Our method is based on variational PEPS optimization algorithms for two-dimensional quantum spin systems, and allows us to compute free energies directly in the thermodynamic limit. The main focus of this work is classical frustration in three-dimensional many-body systems leading to an extensive ground-state degeneracy. We provide high-accuracy results for the residual entropy of the dimer model on the cubic lattice, water-ice $I_h$ and water-ice $I_c$. In addit"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.10598","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:01:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LIgRjmfsDgwBzZ8gZc83tI4bOWhv/SgSpkHMcoBUVU+LJFf4LKg2euKbbMld3xjUpTwXxDxhdCT/R7WJrLz7AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T12:24:00.860943Z"},"content_sha256":"69bd3512db967746f1c9aea4800e1cc5c259d92e2e561ecd8690736855debf3a","schema_version":"1.0","event_id":"sha256:69bd3512db967746f1c9aea4800e1cc5c259d92e2e561ecd8690736855debf3a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5M4RHFCYZZIT3SUPWTW7XO6A3E/bundle.json","state_url":"https://pith.science/pith/5M4RHFCYZZIT3SUPWTW7XO6A3E/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5M4RHFCYZZIT3SUPWTW7XO6A3E/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-06T12:24:00Z","links":{"resolver":"https://pith.science/pith/5M4RHFCYZZIT3SUPWTW7XO6A3E","bundle":"https://pith.science/pith/5M4RHFCYZZIT3SUPWTW7XO6A3E/bundle.json","state":"https://pith.science/pith/5M4RHFCYZZIT3SUPWTW7XO6A3E/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5M4RHFCYZZIT3SUPWTW7XO6A3E/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:5M4RHFCYZZIT3SUPWTW7XO6A3E","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":"14b8879f8efd082d57d292614eaa4eed42361d8ef65371555106528eee1b290b","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.stat-mech","submitted_at":"2018-05-27T08:37:52Z","title_canon_sha256":"5d0a38eea88f1259174d04b079af8cee561beaada2ef3c8acc4ff7e19e430bdb"},"schema_version":"1.0","source":{"id":"1805.10598","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1805.10598","created_at":"2026-05-18T00:01:29Z"},{"alias_kind":"arxiv_version","alias_value":"1805.10598v1","created_at":"2026-05-18T00:01:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.10598","created_at":"2026-05-18T00:01:29Z"},{"alias_kind":"pith_short_12","alias_value":"5M4RHFCYZZIT","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_16","alias_value":"5M4RHFCYZZIT3SUP","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_8","alias_value":"5M4RHFCY","created_at":"2026-05-18T12:32:08Z"}],"graph_snapshots":[{"event_id":"sha256:69bd3512db967746f1c9aea4800e1cc5c259d92e2e561ecd8690736855debf3a","target":"graph","created_at":"2026-05-18T00:01:29Z","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 develop a technique for calculating three-dimensional classical partition functions using projected entangled-pair states (PEPS). Our method is based on variational PEPS optimization algorithms for two-dimensional quantum spin systems, and allows us to compute free energies directly in the thermodynamic limit. The main focus of this work is classical frustration in three-dimensional many-body systems leading to an extensive ground-state degeneracy. We provide high-accuracy results for the residual entropy of the dimer model on the cubic lattice, water-ice $I_h$ and water-ice $I_c$. In addit","authors_text":"Bram Vanhecke, Frank Verstraete, Laurens Vanderstraeten","cross_cats":["cond-mat.str-el"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.stat-mech","submitted_at":"2018-05-27T08:37:52Z","title":"Residual entropies for three-dimensional frustrated spin systems with tensor networks"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.10598","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:d979d48be6202e3a430560f05e201f382a90ee0115b2fb417045b924bd45d640","target":"record","created_at":"2026-05-18T00:01:29Z","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":"14b8879f8efd082d57d292614eaa4eed42361d8ef65371555106528eee1b290b","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.stat-mech","submitted_at":"2018-05-27T08:37:52Z","title_canon_sha256":"5d0a38eea88f1259174d04b079af8cee561beaada2ef3c8acc4ff7e19e430bdb"},"schema_version":"1.0","source":{"id":"1805.10598","kind":"arxiv","version":1}},"canonical_sha256":"eb39139458ce513dca8fb4edfbbbc0d903787f5b7e72a6efc980e8b908d4799c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"eb39139458ce513dca8fb4edfbbbc0d903787f5b7e72a6efc980e8b908d4799c","first_computed_at":"2026-05-18T00:01:29.474206Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:01:29.474206Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"uElTEIeMbKy+EuAf1lhHbA6tEE6HUiMmENaoieGZJ/Ea9/VScAV4f+DPDQHvrX6Al+hR8qsAuOe602so7/wDCA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:01:29.474636Z","signed_message":"canonical_sha256_bytes"},"source_id":"1805.10598","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d979d48be6202e3a430560f05e201f382a90ee0115b2fb417045b924bd45d640","sha256:69bd3512db967746f1c9aea4800e1cc5c259d92e2e561ecd8690736855debf3a"],"state_sha256":"1b105201deb24028f5eebc10625778e0294a1bca2cc1c9954b439926bb7e39aa"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"evZFwhjVtLJ94GMoKALFFWNW1n4hFDbzyIArk8ADOun+5mf+hixUrkHJO5LvsKCVgbWgJZ7SIzsXu6mCgkWgAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T12:24:00.864991Z","bundle_sha256":"4b7ebddefca5b65bfc863afb975a69b7d5b147ddb114e8bb712ea91a198dbdb7"}}