{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:JF4WXGGOEPM7JCAII3ZJEXKENB","short_pith_number":"pith:JF4WXGGO","canonical_record":{"source":{"id":"2507.06929","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2025-07-09T15:11:55Z","cross_cats_sorted":["cs.LG","physics.comp-ph"],"title_canon_sha256":"95b3476c85065c3888a9274d63c20dfae57f83f92697b39d15113bc5bcdc3e22","abstract_canon_sha256":"4cf97951dc49852a4cd75cc35bfd801b63683393df44ad2b9fb4f3743d9780ab"},"schema_version":"1.0"},"canonical_sha256":"49796b98ce23d9f4880846f2925d44686de5430fda30f6622a41e9d24764dd82","source":{"kind":"arxiv","id":"2507.06929","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2507.06929","created_at":"2026-05-21T01:05:06Z"},{"alias_kind":"arxiv_version","alias_value":"2507.06929v2","created_at":"2026-05-21T01:05:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2507.06929","created_at":"2026-05-21T01:05:06Z"},{"alias_kind":"pith_short_12","alias_value":"JF4WXGGOEPM7","created_at":"2026-05-21T01:05:06Z"},{"alias_kind":"pith_short_16","alias_value":"JF4WXGGOEPM7JCAI","created_at":"2026-05-21T01:05:06Z"},{"alias_kind":"pith_short_8","alias_value":"JF4WXGGO","created_at":"2026-05-21T01:05:06Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:JF4WXGGOEPM7JCAII3ZJEXKENB","target":"record","payload":{"canonical_record":{"source":{"id":"2507.06929","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2025-07-09T15:11:55Z","cross_cats_sorted":["cs.LG","physics.comp-ph"],"title_canon_sha256":"95b3476c85065c3888a9274d63c20dfae57f83f92697b39d15113bc5bcdc3e22","abstract_canon_sha256":"4cf97951dc49852a4cd75cc35bfd801b63683393df44ad2b9fb4f3743d9780ab"},"schema_version":"1.0"},"canonical_sha256":"49796b98ce23d9f4880846f2925d44686de5430fda30f6622a41e9d24764dd82","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-21T01:05:06.632529Z","signature_b64":"dQtbJd/+RvULAMngPcp29qWPRjfheAGio/xwbtLRw0LEru8r1UXxaEH1nXvbLQtgcO43L37gqT4oodeEt1T3Dg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"49796b98ce23d9f4880846f2925d44686de5430fda30f6622a41e9d24764dd82","last_reissued_at":"2026-05-21T01:05:06.631492Z","signature_status":"signed_v1","first_computed_at":"2026-05-21T01:05:06.631492Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2507.06929","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":"2026-05-21T01:05:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sOCEC4Cx7COOE582vg985avLPmLgmcfRo9QNtQv+ro0GGx5w8L6Wyc+4y98k6nCb8q2Dji0cZeo6rm0wQb0vBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T11:02:57.116782Z"},"content_sha256":"7821d23717a98e62944d9f60fea9ccce76e968f51d80c39b49dd52fe560ed772","schema_version":"1.0","event_id":"sha256:7821d23717a98e62944d9f60fea9ccce76e968f51d80c39b49dd52fe560ed772"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:JF4WXGGOEPM7JCAII3ZJEXKENB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Machine-Learned Force Fields for Lattice Dynamics at Coupled-Cluster Level Accuracy","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cs.LG","physics.comp-ph"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Andreas Gr\\\"uneis, Florian Libisch, Fredrik V. Eriksson, Johanna P. Carbone, Sita Sch\\\"onbauer","submitted_at":"2025-07-09T15:11:55Z","abstract_excerpt":"We investigate Machine-Learned Force Fields (MLFFs) trained on approximate Density Functional Theory (DFT) and Coupled Cluster (CC) level potential energy surfaces for the carbon diamond and lithium hydride solids. We assess the accuracy and precision of the MLFFs by calculating phonon dispersions and vibrational densities of states (VDOS) that are compared to experiment and reference ab initio results. To overcome limitations from long-range effects and the lack of atomic forces in the CC training data, a delta-learning approach based on the difference between CC and DFT results, as well as a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2507.06929","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2507.06929/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-05-21T01:05:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"i/hYNAW1PfPT2ps01PMCk1m6zJyXfwymZ8PSZq9gu0eace2RP+hUnlECV5f8tRypuGdbvvpmTx7X9m9KGgH4DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T11:02:57.117529Z"},"content_sha256":"c3baa9230efd657c20402f5e93b565321f4a7e706c9128430f266d3968e5457a","schema_version":"1.0","event_id":"sha256:c3baa9230efd657c20402f5e93b565321f4a7e706c9128430f266d3968e5457a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JF4WXGGOEPM7JCAII3ZJEXKENB/bundle.json","state_url":"https://pith.science/pith/JF4WXGGOEPM7JCAII3ZJEXKENB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JF4WXGGOEPM7JCAII3ZJEXKENB/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":"2026-05-26T11:02:57Z","links":{"resolver":"https://pith.science/pith/JF4WXGGOEPM7JCAII3ZJEXKENB","bundle":"https://pith.science/pith/JF4WXGGOEPM7JCAII3ZJEXKENB/bundle.json","state":"https://pith.science/pith/JF4WXGGOEPM7JCAII3ZJEXKENB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JF4WXGGOEPM7JCAII3ZJEXKENB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:JF4WXGGOEPM7JCAII3ZJEXKENB","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":"4cf97951dc49852a4cd75cc35bfd801b63683393df44ad2b9fb4f3743d9780ab","cross_cats_sorted":["cs.LG","physics.comp-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2025-07-09T15:11:55Z","title_canon_sha256":"95b3476c85065c3888a9274d63c20dfae57f83f92697b39d15113bc5bcdc3e22"},"schema_version":"1.0","source":{"id":"2507.06929","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2507.06929","created_at":"2026-05-21T01:05:06Z"},{"alias_kind":"arxiv_version","alias_value":"2507.06929v2","created_at":"2026-05-21T01:05:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2507.06929","created_at":"2026-05-21T01:05:06Z"},{"alias_kind":"pith_short_12","alias_value":"JF4WXGGOEPM7","created_at":"2026-05-21T01:05:06Z"},{"alias_kind":"pith_short_16","alias_value":"JF4WXGGOEPM7JCAI","created_at":"2026-05-21T01:05:06Z"},{"alias_kind":"pith_short_8","alias_value":"JF4WXGGO","created_at":"2026-05-21T01:05:06Z"}],"graph_snapshots":[{"event_id":"sha256:c3baa9230efd657c20402f5e93b565321f4a7e706c9128430f266d3968e5457a","target":"graph","created_at":"2026-05-21T01:05:06Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2507.06929/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We investigate Machine-Learned Force Fields (MLFFs) trained on approximate Density Functional Theory (DFT) and Coupled Cluster (CC) level potential energy surfaces for the carbon diamond and lithium hydride solids. We assess the accuracy and precision of the MLFFs by calculating phonon dispersions and vibrational densities of states (VDOS) that are compared to experiment and reference ab initio results. To overcome limitations from long-range effects and the lack of atomic forces in the CC training data, a delta-learning approach based on the difference between CC and DFT results, as well as a","authors_text":"Andreas Gr\\\"uneis, Florian Libisch, Fredrik V. Eriksson, Johanna P. Carbone, Sita Sch\\\"onbauer","cross_cats":["cs.LG","physics.comp-ph"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2025-07-09T15:11:55Z","title":"Machine-Learned Force Fields for Lattice Dynamics at Coupled-Cluster Level Accuracy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2507.06929","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":"sha256:7821d23717a98e62944d9f60fea9ccce76e968f51d80c39b49dd52fe560ed772","target":"record","created_at":"2026-05-21T01:05:06Z","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":"4cf97951dc49852a4cd75cc35bfd801b63683393df44ad2b9fb4f3743d9780ab","cross_cats_sorted":["cs.LG","physics.comp-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2025-07-09T15:11:55Z","title_canon_sha256":"95b3476c85065c3888a9274d63c20dfae57f83f92697b39d15113bc5bcdc3e22"},"schema_version":"1.0","source":{"id":"2507.06929","kind":"arxiv","version":2}},"canonical_sha256":"49796b98ce23d9f4880846f2925d44686de5430fda30f6622a41e9d24764dd82","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"49796b98ce23d9f4880846f2925d44686de5430fda30f6622a41e9d24764dd82","first_computed_at":"2026-05-21T01:05:06.631492Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-21T01:05:06.631492Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"dQtbJd/+RvULAMngPcp29qWPRjfheAGio/xwbtLRw0LEru8r1UXxaEH1nXvbLQtgcO43L37gqT4oodeEt1T3Dg==","signature_status":"signed_v1","signed_at":"2026-05-21T01:05:06.632529Z","signed_message":"canonical_sha256_bytes"},"source_id":"2507.06929","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7821d23717a98e62944d9f60fea9ccce76e968f51d80c39b49dd52fe560ed772","sha256:c3baa9230efd657c20402f5e93b565321f4a7e706c9128430f266d3968e5457a"],"state_sha256":"667b5dd2952c7cc7d7068c72762f48db68613e02fafe6a1705fb3fe1c241072e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nEoWLIDWH3NNRBz1XS4h9n8tq/4rQ7iMBNiAKkrEAaH7odsCHl+FtPsR58kjDlNU+mRNXqmQsjAWrqGVXKMDAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T11:02:57.121930Z","bundle_sha256":"e8f5663c29f69b1b6422c66cd038d1bb110ac02b6282deca8054f83cb734fa9e"}}