{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:AEZJBBXTM6PZPDIIXFP7KUDQQR","short_pith_number":"pith:AEZJBBXT","canonical_record":{"source":{"id":"2601.00131","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.chem-ph","submitted_at":"2025-12-31T22:23:48Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"47305d35478f8c11cdc2f2dac418e8b3212e2b92512c72388ae3888fbe436e46","abstract_canon_sha256":"d44d4ce8f624d04a6720af441bd47afc36c4be3dcaed121d61f07e9a0201285c"},"schema_version":"1.0"},"canonical_sha256":"01329086f3679f978d08b95ff55070847d986c532158c5e0f5697724c846ea3f","source":{"kind":"arxiv","id":"2601.00131","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2601.00131","created_at":"2026-05-18T02:44:32Z"},{"alias_kind":"arxiv_version","alias_value":"2601.00131v2","created_at":"2026-05-18T02:44:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2601.00131","created_at":"2026-05-18T02:44:32Z"},{"alias_kind":"pith_short_12","alias_value":"AEZJBBXTM6PZ","created_at":"2026-05-18T12:33:37Z"},{"alias_kind":"pith_short_16","alias_value":"AEZJBBXTM6PZPDII","created_at":"2026-05-18T12:33:37Z"},{"alias_kind":"pith_short_8","alias_value":"AEZJBBXT","created_at":"2026-05-18T12:33:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:AEZJBBXTM6PZPDIIXFP7KUDQQR","target":"record","payload":{"canonical_record":{"source":{"id":"2601.00131","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.chem-ph","submitted_at":"2025-12-31T22:23:48Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"47305d35478f8c11cdc2f2dac418e8b3212e2b92512c72388ae3888fbe436e46","abstract_canon_sha256":"d44d4ce8f624d04a6720af441bd47afc36c4be3dcaed121d61f07e9a0201285c"},"schema_version":"1.0"},"canonical_sha256":"01329086f3679f978d08b95ff55070847d986c532158c5e0f5697724c846ea3f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:44:32.005283Z","signature_b64":"TUJjJa5MsTnsHd9bTnepQIwk2J3LRIIjeaNGDaIu5N11ooVefSjeqbUeLYaAOX4VHR80eeKliYuU5Oj5qG/EBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"01329086f3679f978d08b95ff55070847d986c532158c5e0f5697724c846ea3f","last_reissued_at":"2026-05-18T02:44:32.004822Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:44:32.004822Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2601.00131","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:44:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0YAGZ4uJHbVy8LF+4bfnKzARjOepn9BZFQoIUTCANA1Fh/Qspi1rsF/tOppmlWvOgx3k1pY/JK2E9aCAFfsZBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T11:38:28.253574Z"},"content_sha256":"542b196be3d1f504f72ccb60d46c4c2d673b22c45b75a9fddb76e5cf7660085d","schema_version":"1.0","event_id":"sha256:542b196be3d1f504f72ccb60d46c4c2d673b22c45b75a9fddb76e5cf7660085d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:AEZJBBXTM6PZPDIIXFP7KUDQQR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Random phase approximation-based local natural orbital coupled cluster theory","license":"http://creativecommons.org/licenses/by/4.0/","headline":"RPA replaces MP2 as low-level theory in LNO-CC to match accuracy on gapped systems while converging faster for metals.","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"physics.chem-ph","authors_text":"Aamy Bakry, Hong-Zhou Ye, Ruiheng Song, Xiliang Gong","submitted_at":"2025-12-31T22:23:48Z","abstract_excerpt":"Practical applications of fragment embedding and closely related local correlation methods critically depend on a judicious choice of a low-level theory to define the local embedding subspace and to capture long-range electrostatic and correlation effects outside the embedding region. Second-order M{\\o}ller-Plesset perturbation theory (MP2) is by far the most widely used correlated low-level theory; however, its applicability becomes questionable in systems where MP2 is known to fail either quantitatively or qualitatively. In this work, we present the random phase approximation (RPA) as a prom"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"RPA-based LNO-CC closely matches the performance of its MP2-based counterpart for systems with sizable energy gaps, while delivering significantly faster convergence toward the canonical coupled-cluster limit for metallic systems, particularly as the thermodynamic limit is approached.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"That RPA adequately captures long-range electrostatic and correlation effects outside the embedding region when used as the low-level theory in the LNO-CC framework.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"RPA-based LNO-CC matches MP2 performance for systems with energy gaps and shows faster convergence for metallic systems approaching the thermodynamic limit.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"RPA replaces MP2 as low-level theory in LNO-CC to match accuracy on gapped systems while converging faster for metals.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"c94473c0463fe4e5750a898862e677b89edd34a326bff0e8534066705ae3a540"},"source":{"id":"2601.00131","kind":"arxiv","version":2},"verdict":{"id":"a14214ee-0946-48a5-b917-3462bb182ee5","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-16T17:43:03.445434Z","strongest_claim":"RPA-based LNO-CC closely matches the performance of its MP2-based counterpart for systems with sizable energy gaps, while delivering significantly faster convergence toward the canonical coupled-cluster limit for metallic systems, particularly as the thermodynamic limit is approached.","one_line_summary":"RPA-based LNO-CC matches MP2 performance for systems with energy gaps and shows faster convergence for metallic systems approaching the thermodynamic limit.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"That RPA adequately captures long-range electrostatic and correlation effects outside the embedding region when used as the low-level theory in the LNO-CC framework.","pith_extraction_headline":"RPA replaces MP2 as low-level theory in LNO-CC to match accuracy on gapped systems while converging faster for metals."},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":1,"snapshot_sha256":"a9eacd10ac2581e246f9a1983db44ec633cc84aba8178aa7e75e49ed811e16c1"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":"a14214ee-0946-48a5-b917-3462bb182ee5"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:44:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9ByxNFci5OIdD35l3Y71H+yb+mSMkjwpsLzzxPr3Gq4OC5RcC1+E9Imm9VvgWEoStyYiPa3hqhg0VthfIPJKAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T11:38:28.254405Z"},"content_sha256":"c4334a412b90ca9364694d5578203784a39dfcf63a87cac5ee1eca7f9cf899cc","schema_version":"1.0","event_id":"sha256:c4334a412b90ca9364694d5578203784a39dfcf63a87cac5ee1eca7f9cf899cc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/AEZJBBXTM6PZPDIIXFP7KUDQQR/bundle.json","state_url":"https://pith.science/pith/AEZJBBXTM6PZPDIIXFP7KUDQQR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/AEZJBBXTM6PZPDIIXFP7KUDQQR/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":"2026-05-27T11:38:28Z","links":{"resolver":"https://pith.science/pith/AEZJBBXTM6PZPDIIXFP7KUDQQR","bundle":"https://pith.science/pith/AEZJBBXTM6PZPDIIXFP7KUDQQR/bundle.json","state":"https://pith.science/pith/AEZJBBXTM6PZPDIIXFP7KUDQQR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/AEZJBBXTM6PZPDIIXFP7KUDQQR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:AEZJBBXTM6PZPDIIXFP7KUDQQR","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":"d44d4ce8f624d04a6720af441bd47afc36c4be3dcaed121d61f07e9a0201285c","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.chem-ph","submitted_at":"2025-12-31T22:23:48Z","title_canon_sha256":"47305d35478f8c11cdc2f2dac418e8b3212e2b92512c72388ae3888fbe436e46"},"schema_version":"1.0","source":{"id":"2601.00131","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2601.00131","created_at":"2026-05-18T02:44:32Z"},{"alias_kind":"arxiv_version","alias_value":"2601.00131v2","created_at":"2026-05-18T02:44:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2601.00131","created_at":"2026-05-18T02:44:32Z"},{"alias_kind":"pith_short_12","alias_value":"AEZJBBXTM6PZ","created_at":"2026-05-18T12:33:37Z"},{"alias_kind":"pith_short_16","alias_value":"AEZJBBXTM6PZPDII","created_at":"2026-05-18T12:33:37Z"},{"alias_kind":"pith_short_8","alias_value":"AEZJBBXT","created_at":"2026-05-18T12:33:37Z"}],"graph_snapshots":[{"event_id":"sha256:c4334a412b90ca9364694d5578203784a39dfcf63a87cac5ee1eca7f9cf899cc","target":"graph","created_at":"2026-05-18T02:44:32Z","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":4,"items":[{"attestation":"unclaimed","claim_id":"C1","kind":"strongest_claim","source":"verdict.strongest_claim","status":"machine_extracted","text":"RPA-based LNO-CC closely matches the performance of its MP2-based counterpart for systems with sizable energy gaps, while delivering significantly faster convergence toward the canonical coupled-cluster limit for metallic systems, particularly as the thermodynamic limit is approached."},{"attestation":"unclaimed","claim_id":"C2","kind":"weakest_assumption","source":"verdict.weakest_assumption","status":"machine_extracted","text":"That RPA adequately captures long-range electrostatic and correlation effects outside the embedding region when used as the low-level theory in the LNO-CC framework."},{"attestation":"unclaimed","claim_id":"C3","kind":"one_line_summary","source":"verdict.one_line_summary","status":"machine_extracted","text":"RPA-based LNO-CC matches MP2 performance for systems with energy gaps and shows faster convergence for metallic systems approaching the thermodynamic limit."},{"attestation":"unclaimed","claim_id":"C4","kind":"headline","source":"verdict.pith_extraction.headline","status":"machine_extracted","text":"RPA replaces MP2 as low-level theory in LNO-CC to match accuracy on gapped systems while converging faster for metals."}],"snapshot_sha256":"c94473c0463fe4e5750a898862e677b89edd34a326bff0e8534066705ae3a540"},"formal_canon":{"evidence_count":1,"snapshot_sha256":"a9eacd10ac2581e246f9a1983db44ec633cc84aba8178aa7e75e49ed811e16c1"},"paper":{"abstract_excerpt":"Practical applications of fragment embedding and closely related local correlation methods critically depend on a judicious choice of a low-level theory to define the local embedding subspace and to capture long-range electrostatic and correlation effects outside the embedding region. Second-order M{\\o}ller-Plesset perturbation theory (MP2) is by far the most widely used correlated low-level theory; however, its applicability becomes questionable in systems where MP2 is known to fail either quantitatively or qualitatively. In this work, we present the random phase approximation (RPA) as a prom","authors_text":"Aamy Bakry, Hong-Zhou Ye, Ruiheng Song, Xiliang Gong","cross_cats":["cond-mat.mtrl-sci"],"headline":"RPA replaces MP2 as low-level theory in LNO-CC to match accuracy on gapped systems while converging faster for metals.","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.chem-ph","submitted_at":"2025-12-31T22:23:48Z","title":"Random phase approximation-based local natural orbital coupled cluster theory"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2601.00131","kind":"arxiv","version":2},"verdict":{"created_at":"2026-05-16T17:43:03.445434Z","id":"a14214ee-0946-48a5-b917-3462bb182ee5","model_set":{"reader":"grok-4.3"},"one_line_summary":"RPA-based LNO-CC matches MP2 performance for systems with energy gaps and shows faster convergence for metallic systems approaching the thermodynamic limit.","pipeline_version":"pith-pipeline@v0.9.0","pith_extraction_headline":"RPA replaces MP2 as low-level theory in LNO-CC to match accuracy on gapped systems while converging faster for metals.","strongest_claim":"RPA-based LNO-CC closely matches the performance of its MP2-based counterpart for systems with sizable energy gaps, while delivering significantly faster convergence toward the canonical coupled-cluster limit for metallic systems, particularly as the thermodynamic limit is approached.","weakest_assumption":"That RPA adequately captures long-range electrostatic and correlation effects outside the embedding region when used as the low-level theory in the LNO-CC framework."}},"verdict_id":"a14214ee-0946-48a5-b917-3462bb182ee5"}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:542b196be3d1f504f72ccb60d46c4c2d673b22c45b75a9fddb76e5cf7660085d","target":"record","created_at":"2026-05-18T02:44:32Z","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":"d44d4ce8f624d04a6720af441bd47afc36c4be3dcaed121d61f07e9a0201285c","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.chem-ph","submitted_at":"2025-12-31T22:23:48Z","title_canon_sha256":"47305d35478f8c11cdc2f2dac418e8b3212e2b92512c72388ae3888fbe436e46"},"schema_version":"1.0","source":{"id":"2601.00131","kind":"arxiv","version":2}},"canonical_sha256":"01329086f3679f978d08b95ff55070847d986c532158c5e0f5697724c846ea3f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"01329086f3679f978d08b95ff55070847d986c532158c5e0f5697724c846ea3f","first_computed_at":"2026-05-18T02:44:32.004822Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:44:32.004822Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"TUJjJa5MsTnsHd9bTnepQIwk2J3LRIIjeaNGDaIu5N11ooVefSjeqbUeLYaAOX4VHR80eeKliYuU5Oj5qG/EBg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:44:32.005283Z","signed_message":"canonical_sha256_bytes"},"source_id":"2601.00131","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:542b196be3d1f504f72ccb60d46c4c2d673b22c45b75a9fddb76e5cf7660085d","sha256:c4334a412b90ca9364694d5578203784a39dfcf63a87cac5ee1eca7f9cf899cc"],"state_sha256":"c1385467f55bdb0e0490c128938848a50d4a863bcd8d01a4a3eadf284ce09e27"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mxWkpA9rqUnnZnk7hSn/lfgfa25ha6xJn7cjXZffQT2C5YJpp1pxyXJXYtK1x6Tt7hXPhJDq70TfbwN6hMuUBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T11:38:28.258539Z","bundle_sha256":"f70097ccc9a2090074d3443f1d1fe79316f16c61c519123d732201dfa12a6bbf"}}