{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:APS57GP45SQBJZHOJEDMA5WRW2","short_pith_number":"pith:APS57GP4","canonical_record":{"source":{"id":"2408.16505","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2024-08-29T13:03:21Z","cross_cats_sorted":[],"title_canon_sha256":"9e68aaff7ace3362548d2e1e4e46a3135f13d63846a9a5bc661a57e53442c4b9","abstract_canon_sha256":"0900d323c971c71d10cc35490e5862ed7fdfd0f7740faa0a6f7385c76f650d6e"},"schema_version":"1.0"},"canonical_sha256":"03e5df99fceca014e4ee4906c076d1b6981a1106cc7fb95c2ac2a8e53e7f4275","source":{"kind":"arxiv","id":"2408.16505","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2408.16505","created_at":"2026-07-05T09:00:42Z"},{"alias_kind":"arxiv_version","alias_value":"2408.16505v1","created_at":"2026-07-05T09:00:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2408.16505","created_at":"2026-07-05T09:00:42Z"},{"alias_kind":"pith_short_12","alias_value":"APS57GP45SQB","created_at":"2026-07-05T09:00:42Z"},{"alias_kind":"pith_short_16","alias_value":"APS57GP45SQBJZHO","created_at":"2026-07-05T09:00:42Z"},{"alias_kind":"pith_short_8","alias_value":"APS57GP4","created_at":"2026-07-05T09:00:42Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:APS57GP45SQBJZHOJEDMA5WRW2","target":"record","payload":{"canonical_record":{"source":{"id":"2408.16505","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2024-08-29T13:03:21Z","cross_cats_sorted":[],"title_canon_sha256":"9e68aaff7ace3362548d2e1e4e46a3135f13d63846a9a5bc661a57e53442c4b9","abstract_canon_sha256":"0900d323c971c71d10cc35490e5862ed7fdfd0f7740faa0a6f7385c76f650d6e"},"schema_version":"1.0"},"canonical_sha256":"03e5df99fceca014e4ee4906c076d1b6981a1106cc7fb95c2ac2a8e53e7f4275","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T09:00:42.502038Z","signature_b64":"iFh6qbahVgbbj8GWf8fiFvdf6My9iEsozos9S9T8PjMxCjb4HoFMXQXFur6QKJ7Cnect8HtYfLPFE13heQPtAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"03e5df99fceca014e4ee4906c076d1b6981a1106cc7fb95c2ac2a8e53e7f4275","last_reissued_at":"2026-07-05T09:00:42.501615Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T09:00:42.501615Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2408.16505","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":"2026-07-05T09:00:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BW5OHN0tqs/UXWeF7lqGHzGfQ2E0pLCJEDZj5vFIPQpgwhWIW16ZnlYdapk4cJbzrX3ryHYVg4nfBBKhH+B9BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T14:48:44.599847Z"},"content_sha256":"a8e6012a42a4cb7216e9d55d8ac6976686ec5fbe3997cdb135663a20a8ea3673","schema_version":"1.0","event_id":"sha256:a8e6012a42a4cb7216e9d55d8ac6976686ec5fbe3997cdb135663a20a8ea3673"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:APS57GP45SQBJZHOJEDMA5WRW2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Combining Effective Hamiltonians and Brillouin-Wigner Approach: A Perturbative Approach to Spectroscopy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.chem-ph","authors_text":"Bastien Valentin, Oussama Bindech, Saad Yalouz, Vincent Robert","submitted_at":"2024-08-29T13:03:21Z","abstract_excerpt":"The numerical cost of variational methods suggests using perturbative approaches to determine the electronic structure of molecular systems. In this work, a sequential construction of effective Hamiltonians drives the definition of approximate model functions and energies in a multi-state Rayleigh-Schr\\\"odinger perturbative scheme. A second step takes advantage of an updated partitioning of the Hamiltonian to perform a state-specific Brillouin-Wigner energy correction based on a well-tempered perturbation expansion. The multi-step RSBW method is exemplified on model-Hamiltonians to stress its "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2408.16505","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/2408.16505/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":"2026-07-05T09:00:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"A20xucexkvKJ5xR0F6J/24N3UMRCqNeTWteHGDcOn0TRaz7g2/FHxfdDSLRSPpTEr+7StOa4M0ySlKUp+AlZDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T14:48:44.600218Z"},"content_sha256":"ab91670884a505d711def63e7fef0e64e57880125b30ac993b9d8b1ba98cacb6","schema_version":"1.0","event_id":"sha256:ab91670884a505d711def63e7fef0e64e57880125b30ac993b9d8b1ba98cacb6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/APS57GP45SQBJZHOJEDMA5WRW2/bundle.json","state_url":"https://pith.science/pith/APS57GP45SQBJZHOJEDMA5WRW2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/APS57GP45SQBJZHOJEDMA5WRW2/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":"2026-07-06T14:48:44Z","links":{"resolver":"https://pith.science/pith/APS57GP45SQBJZHOJEDMA5WRW2","bundle":"https://pith.science/pith/APS57GP45SQBJZHOJEDMA5WRW2/bundle.json","state":"https://pith.science/pith/APS57GP45SQBJZHOJEDMA5WRW2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/APS57GP45SQBJZHOJEDMA5WRW2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:APS57GP45SQBJZHOJEDMA5WRW2","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":"0900d323c971c71d10cc35490e5862ed7fdfd0f7740faa0a6f7385c76f650d6e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2024-08-29T13:03:21Z","title_canon_sha256":"9e68aaff7ace3362548d2e1e4e46a3135f13d63846a9a5bc661a57e53442c4b9"},"schema_version":"1.0","source":{"id":"2408.16505","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2408.16505","created_at":"2026-07-05T09:00:42Z"},{"alias_kind":"arxiv_version","alias_value":"2408.16505v1","created_at":"2026-07-05T09:00:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2408.16505","created_at":"2026-07-05T09:00:42Z"},{"alias_kind":"pith_short_12","alias_value":"APS57GP45SQB","created_at":"2026-07-05T09:00:42Z"},{"alias_kind":"pith_short_16","alias_value":"APS57GP45SQBJZHO","created_at":"2026-07-05T09:00:42Z"},{"alias_kind":"pith_short_8","alias_value":"APS57GP4","created_at":"2026-07-05T09:00:42Z"}],"graph_snapshots":[{"event_id":"sha256:ab91670884a505d711def63e7fef0e64e57880125b30ac993b9d8b1ba98cacb6","target":"graph","created_at":"2026-07-05T09:00:42Z","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/2408.16505/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The numerical cost of variational methods suggests using perturbative approaches to determine the electronic structure of molecular systems. In this work, a sequential construction of effective Hamiltonians drives the definition of approximate model functions and energies in a multi-state Rayleigh-Schr\\\"odinger perturbative scheme. A second step takes advantage of an updated partitioning of the Hamiltonian to perform a state-specific Brillouin-Wigner energy correction based on a well-tempered perturbation expansion. The multi-step RSBW method is exemplified on model-Hamiltonians to stress its ","authors_text":"Bastien Valentin, Oussama Bindech, Saad Yalouz, Vincent Robert","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2024-08-29T13:03:21Z","title":"Combining Effective Hamiltonians and Brillouin-Wigner Approach: A Perturbative Approach to Spectroscopy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2408.16505","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:a8e6012a42a4cb7216e9d55d8ac6976686ec5fbe3997cdb135663a20a8ea3673","target":"record","created_at":"2026-07-05T09:00:42Z","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":"0900d323c971c71d10cc35490e5862ed7fdfd0f7740faa0a6f7385c76f650d6e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2024-08-29T13:03:21Z","title_canon_sha256":"9e68aaff7ace3362548d2e1e4e46a3135f13d63846a9a5bc661a57e53442c4b9"},"schema_version":"1.0","source":{"id":"2408.16505","kind":"arxiv","version":1}},"canonical_sha256":"03e5df99fceca014e4ee4906c076d1b6981a1106cc7fb95c2ac2a8e53e7f4275","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"03e5df99fceca014e4ee4906c076d1b6981a1106cc7fb95c2ac2a8e53e7f4275","first_computed_at":"2026-07-05T09:00:42.501615Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T09:00:42.501615Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"iFh6qbahVgbbj8GWf8fiFvdf6My9iEsozos9S9T8PjMxCjb4HoFMXQXFur6QKJ7Cnect8HtYfLPFE13heQPtAw==","signature_status":"signed_v1","signed_at":"2026-07-05T09:00:42.502038Z","signed_message":"canonical_sha256_bytes"},"source_id":"2408.16505","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a8e6012a42a4cb7216e9d55d8ac6976686ec5fbe3997cdb135663a20a8ea3673","sha256:ab91670884a505d711def63e7fef0e64e57880125b30ac993b9d8b1ba98cacb6"],"state_sha256":"4c8b73e12bbad5ffe18477ef7af7f99766f3c1529e1f042b65d935895566255b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"edTCcEw8SmVJwUw2WHC7cq7nEofM+XlHH2xUWV7hBHcuG/zycaRhI0NhxdFwtqLRCU0TBaoERudBKtmmchVwBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-06T14:48:44.602746Z","bundle_sha256":"09e1cffb4e70675d8ec6bed0f3a82cc9ccd077e80b5cfccff3817b78dac331af"}}