{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:TUSVTGQOPD5YL5UR7IIZKARPVJ","short_pith_number":"pith:TUSVTGQO","canonical_record":{"source":{"id":"2607.20728","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2026-07-22T20:57:08Z","cross_cats_sorted":[],"title_canon_sha256":"782bde002a521cf7be91c4749f2d5e2d5d7f56f011110dacc231242b9bf516b4","abstract_canon_sha256":"e04af937aec644252b2af9294b86ca731d202608175c9e5b67428092dd0b017f"},"schema_version":"1.0"},"canonical_sha256":"9d25599a0e78fb85f691fa1195022faa78bc42503553cde04ff80d4d81945015","source":{"kind":"arxiv","id":"2607.20728","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.20728","created_at":"2026-07-24T00:23:31Z"},{"alias_kind":"arxiv_version","alias_value":"2607.20728v1","created_at":"2026-07-24T00:23:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.20728","created_at":"2026-07-24T00:23:31Z"},{"alias_kind":"pith_short_12","alias_value":"TUSVTGQOPD5Y","created_at":"2026-07-24T00:23:31Z"},{"alias_kind":"pith_short_16","alias_value":"TUSVTGQOPD5YL5UR","created_at":"2026-07-24T00:23:31Z"},{"alias_kind":"pith_short_8","alias_value":"TUSVTGQO","created_at":"2026-07-24T00:23:31Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:TUSVTGQOPD5YL5UR7IIZKARPVJ","target":"record","payload":{"canonical_record":{"source":{"id":"2607.20728","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2026-07-22T20:57:08Z","cross_cats_sorted":[],"title_canon_sha256":"782bde002a521cf7be91c4749f2d5e2d5d7f56f011110dacc231242b9bf516b4","abstract_canon_sha256":"e04af937aec644252b2af9294b86ca731d202608175c9e5b67428092dd0b017f"},"schema_version":"1.0"},"canonical_sha256":"9d25599a0e78fb85f691fa1195022faa78bc42503553cde04ff80d4d81945015","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-24T00:23:31.588140Z","signature_b64":"6BSdYMEKk+nS5dLD8N5gKTwPNEXSi10oAgvhfyTmD+bnpB2E+oJjlGQUPcF3Gfj3/1R2x1boPTWFvDM/BuEpCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9d25599a0e78fb85f691fa1195022faa78bc42503553cde04ff80d4d81945015","last_reissued_at":"2026-07-24T00:23:31.586949Z","signature_status":"signed_v1","first_computed_at":"2026-07-24T00:23:31.586949Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2607.20728","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":"2026-07-24T00:23:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SFyJZOPqWxTqdl5muC92/7pQQ4ANtOBB4ReWeBNh+PxCLgUU6rgmfStd5lE8MBK5IKs1JbZaZOYSBcK98siMBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T20:14:35.545453Z"},"content_sha256":"cc72db9daae9306d66e213cd91cc57c977e6c31ee95939ff6fa7d0958d4dc734","schema_version":"1.0","event_id":"sha256:cc72db9daae9306d66e213cd91cc57c977e6c31ee95939ff6fa7d0958d4dc734"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:TUSVTGQOPD5YL5UR7IIZKARPVJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Analytical Forces from the Bethe-Salpeter Equation for Large-Scale Excited-State Relaxation","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Giulia Galli, Marco Govoni, Victor Wen-zhe Yu, Yu Jin","submitted_at":"2026-07-22T20:57:08Z","abstract_excerpt":"We present an efficient plane-wave implementation of analytical nuclear forces for electronic excited states described by the Bethe-Salpeter equation (BSE). The formulation combines density-matrix perturbation theory with a Lagrangian approach, and avoids both explicit empty-state summations and the response calculations for each atomic displacement, required by conventional approaches based on density functional perturbation theory. Together with GPU acceleration, these advances make BSE forces calculations tractable for solid-state systems containing hundreds of atoms. We demonstrate the met"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.20728","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2607.20728/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":"2026-07-24T00:23:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Fd4MW9819BNmCXxzGpgowVvELb3xDQKznKrJUUMM4rTvksXZnHxc3DM1dwd2R9Sh5msoTIIw0rLfABVioO95Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T20:14:35.545954Z"},"content_sha256":"5c182db9e6bc49f0a164dd76c291603b7876a55f2ef5d07586c468dcedb08f26","schema_version":"1.0","event_id":"sha256:5c182db9e6bc49f0a164dd76c291603b7876a55f2ef5d07586c468dcedb08f26"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TUSVTGQOPD5YL5UR7IIZKARPVJ/bundle.json","state_url":"https://pith.science/pith/TUSVTGQOPD5YL5UR7IIZKARPVJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TUSVTGQOPD5YL5UR7IIZKARPVJ/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":"2026-08-11T20:14:35Z","links":{"resolver":"https://pith.science/pith/TUSVTGQOPD5YL5UR7IIZKARPVJ","bundle":"https://pith.science/pith/TUSVTGQOPD5YL5UR7IIZKARPVJ/bundle.json","state":"https://pith.science/pith/TUSVTGQOPD5YL5UR7IIZKARPVJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TUSVTGQOPD5YL5UR7IIZKARPVJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:TUSVTGQOPD5YL5UR7IIZKARPVJ","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":"e04af937aec644252b2af9294b86ca731d202608175c9e5b67428092dd0b017f","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2026-07-22T20:57:08Z","title_canon_sha256":"782bde002a521cf7be91c4749f2d5e2d5d7f56f011110dacc231242b9bf516b4"},"schema_version":"1.0","source":{"id":"2607.20728","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.20728","created_at":"2026-07-24T00:23:31Z"},{"alias_kind":"arxiv_version","alias_value":"2607.20728v1","created_at":"2026-07-24T00:23:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.20728","created_at":"2026-07-24T00:23:31Z"},{"alias_kind":"pith_short_12","alias_value":"TUSVTGQOPD5Y","created_at":"2026-07-24T00:23:31Z"},{"alias_kind":"pith_short_16","alias_value":"TUSVTGQOPD5YL5UR","created_at":"2026-07-24T00:23:31Z"},{"alias_kind":"pith_short_8","alias_value":"TUSVTGQO","created_at":"2026-07-24T00:23:31Z"}],"graph_snapshots":[{"event_id":"sha256:5c182db9e6bc49f0a164dd76c291603b7876a55f2ef5d07586c468dcedb08f26","target":"graph","created_at":"2026-07-24T00:23:31Z","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/2607.20728/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present an efficient plane-wave implementation of analytical nuclear forces for electronic excited states described by the Bethe-Salpeter equation (BSE). The formulation combines density-matrix perturbation theory with a Lagrangian approach, and avoids both explicit empty-state summations and the response calculations for each atomic displacement, required by conventional approaches based on density functional perturbation theory. Together with GPU acceleration, these advances make BSE forces calculations tractable for solid-state systems containing hundreds of atoms. We demonstrate the met","authors_text":"Giulia Galli, Marco Govoni, Victor Wen-zhe Yu, Yu Jin","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2026-07-22T20:57:08Z","title":"Analytical Forces from the Bethe-Salpeter Equation for Large-Scale Excited-State Relaxation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.20728","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:cc72db9daae9306d66e213cd91cc57c977e6c31ee95939ff6fa7d0958d4dc734","target":"record","created_at":"2026-07-24T00:23:31Z","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":"e04af937aec644252b2af9294b86ca731d202608175c9e5b67428092dd0b017f","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2026-07-22T20:57:08Z","title_canon_sha256":"782bde002a521cf7be91c4749f2d5e2d5d7f56f011110dacc231242b9bf516b4"},"schema_version":"1.0","source":{"id":"2607.20728","kind":"arxiv","version":1}},"canonical_sha256":"9d25599a0e78fb85f691fa1195022faa78bc42503553cde04ff80d4d81945015","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9d25599a0e78fb85f691fa1195022faa78bc42503553cde04ff80d4d81945015","first_computed_at":"2026-07-24T00:23:31.586949Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-24T00:23:31.586949Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6BSdYMEKk+nS5dLD8N5gKTwPNEXSi10oAgvhfyTmD+bnpB2E+oJjlGQUPcF3Gfj3/1R2x1boPTWFvDM/BuEpCg==","signature_status":"signed_v1","signed_at":"2026-07-24T00:23:31.588140Z","signed_message":"canonical_sha256_bytes"},"source_id":"2607.20728","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cc72db9daae9306d66e213cd91cc57c977e6c31ee95939ff6fa7d0958d4dc734","sha256:5c182db9e6bc49f0a164dd76c291603b7876a55f2ef5d07586c468dcedb08f26"],"state_sha256":"54b55be128b7a3554fcd9acb2e17adb784274e365380d04e7887e5d7ea31082d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Mb+IS5Wv8Tnomc/0V4SIaGvLGQ6bjJ2JclvR+9y3PrPzBgOCoGi06E5SJqxaLveFKEfjw1ZN0f3r1xLaCIXeDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-11T20:14:35.550475Z","bundle_sha256":"1fbe8a2fb4e640f4d4b1727310f7f0fb17f570ea784903c3c055d2339c108845"}}