{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:7DSNDNRYKUHUYO5QMTAFE7NYWC","short_pith_number":"pith:7DSNDNRY","canonical_record":{"source":{"id":"2607.00981","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.chem-ph","submitted_at":"2026-07-01T14:16:25Z","cross_cats_sorted":[],"title_canon_sha256":"d1720c5b92455bf603b7e53ed46278995f2da52b845b652d68de4b29b62ad8ee","abstract_canon_sha256":"b5efcf24b1bfce27c0b4ea9287043c76a9942d663948d3770bc2cbc3ec30fbc3"},"schema_version":"1.0"},"canonical_sha256":"f8e4d1b638550f4c3bb064c0527db8b081248951e90e1e99a9f1b3c62b26c9c9","source":{"kind":"arxiv","id":"2607.00981","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.00981","created_at":"2026-07-02T01:18:25Z"},{"alias_kind":"arxiv_version","alias_value":"2607.00981v1","created_at":"2026-07-02T01:18:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.00981","created_at":"2026-07-02T01:18:25Z"},{"alias_kind":"pith_short_12","alias_value":"7DSNDNRYKUHU","created_at":"2026-07-02T01:18:25Z"},{"alias_kind":"pith_short_16","alias_value":"7DSNDNRYKUHUYO5Q","created_at":"2026-07-02T01:18:25Z"},{"alias_kind":"pith_short_8","alias_value":"7DSNDNRY","created_at":"2026-07-02T01:18:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:7DSNDNRYKUHUYO5QMTAFE7NYWC","target":"record","payload":{"canonical_record":{"source":{"id":"2607.00981","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.chem-ph","submitted_at":"2026-07-01T14:16:25Z","cross_cats_sorted":[],"title_canon_sha256":"d1720c5b92455bf603b7e53ed46278995f2da52b845b652d68de4b29b62ad8ee","abstract_canon_sha256":"b5efcf24b1bfce27c0b4ea9287043c76a9942d663948d3770bc2cbc3ec30fbc3"},"schema_version":"1.0"},"canonical_sha256":"f8e4d1b638550f4c3bb064c0527db8b081248951e90e1e99a9f1b3c62b26c9c9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-02T01:18:25.110257Z","signature_b64":"oaVRydUAMQFRUCk4aBb5KdMGcDYecbO4I3MQ8OdbReo/oy9PlvaFXAkc0JqJZUFu9pvNObM1WHsu5M7gX7OABA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f8e4d1b638550f4c3bb064c0527db8b081248951e90e1e99a9f1b3c62b26c9c9","last_reissued_at":"2026-07-02T01:18:25.109903Z","signature_status":"signed_v1","first_computed_at":"2026-07-02T01:18:25.109903Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2607.00981","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":"2026-07-02T01:18:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ynRVhjZaB4Enw1chbNshMZlR1O2lM80QYWPcXuzSDcapEmbyuVpru0aYy4IDVVyB62ejdHncNeEYSQleAvL6DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-04T02:00:27.111825Z"},"content_sha256":"4791960690d8f349f182510307d27131565210306daeabfa97a26a6bca1f6395","schema_version":"1.0","event_id":"sha256:4791960690d8f349f182510307d27131565210306daeabfa97a26a6bca1f6395"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:7DSNDNRYKUHUYO5QMTAFE7NYWC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"High-performance parallel implementation of high-order coupled-cluster theories","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"physics.chem-ph","authors_text":"Christopher Hillenbrand, Huanchen Zhai, Timothy C. Berkelbach, Yu Jin","submitted_at":"2026-07-01T14:16:25Z","abstract_excerpt":"High-order coupled-cluster theories with iterative triples (CCSDT), perturbative quadruples [CCSDT(Q)], and iterative quadruples (CCSDTQ) provide benchmark-quality correlation energies, but their steep computational scalings, $O(N^8), O(N^9)$, and $O(N^{10})$, together with the large memory requirements of high-order amplitude tensors, have historically limited their application to small molecules. In this work, we develop efficient open-source implementations of spin-restricted CCSDT (RCCSDT), RCCSDT(Q), RCCSDTQ, and spin-unrestricted CCSDT (UCCSDT) within the PySCF package. The shared-memory"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.00981","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/2607.00981/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":"2026-07-02T01:18:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jrRQ/A0afnWO3Cudk+b96jz4UDnwwBxHCNxiVmmaJt6ntMGhJIPXXjxHXXbf6+xVs3ndSU4FKWkXOmgmI3rDCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-04T02:00:27.112390Z"},"content_sha256":"fef2f2d4aeb1b53359500e812d855611b7fae986b7347543c00cccfe144dc91b","schema_version":"1.0","event_id":"sha256:fef2f2d4aeb1b53359500e812d855611b7fae986b7347543c00cccfe144dc91b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7DSNDNRYKUHUYO5QMTAFE7NYWC/bundle.json","state_url":"https://pith.science/pith/7DSNDNRYKUHUYO5QMTAFE7NYWC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7DSNDNRYKUHUYO5QMTAFE7NYWC/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":"2026-07-04T02:00:27Z","links":{"resolver":"https://pith.science/pith/7DSNDNRYKUHUYO5QMTAFE7NYWC","bundle":"https://pith.science/pith/7DSNDNRYKUHUYO5QMTAFE7NYWC/bundle.json","state":"https://pith.science/pith/7DSNDNRYKUHUYO5QMTAFE7NYWC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7DSNDNRYKUHUYO5QMTAFE7NYWC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:7DSNDNRYKUHUYO5QMTAFE7NYWC","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":"b5efcf24b1bfce27c0b4ea9287043c76a9942d663948d3770bc2cbc3ec30fbc3","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.chem-ph","submitted_at":"2026-07-01T14:16:25Z","title_canon_sha256":"d1720c5b92455bf603b7e53ed46278995f2da52b845b652d68de4b29b62ad8ee"},"schema_version":"1.0","source":{"id":"2607.00981","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.00981","created_at":"2026-07-02T01:18:25Z"},{"alias_kind":"arxiv_version","alias_value":"2607.00981v1","created_at":"2026-07-02T01:18:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.00981","created_at":"2026-07-02T01:18:25Z"},{"alias_kind":"pith_short_12","alias_value":"7DSNDNRYKUHU","created_at":"2026-07-02T01:18:25Z"},{"alias_kind":"pith_short_16","alias_value":"7DSNDNRYKUHUYO5Q","created_at":"2026-07-02T01:18:25Z"},{"alias_kind":"pith_short_8","alias_value":"7DSNDNRY","created_at":"2026-07-02T01:18:25Z"}],"graph_snapshots":[{"event_id":"sha256:fef2f2d4aeb1b53359500e812d855611b7fae986b7347543c00cccfe144dc91b","target":"graph","created_at":"2026-07-02T01:18:25Z","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/2607.00981/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"High-order coupled-cluster theories with iterative triples (CCSDT), perturbative quadruples [CCSDT(Q)], and iterative quadruples (CCSDTQ) provide benchmark-quality correlation energies, but their steep computational scalings, $O(N^8), O(N^9)$, and $O(N^{10})$, together with the large memory requirements of high-order amplitude tensors, have historically limited their application to small molecules. In this work, we develop efficient open-source implementations of spin-restricted CCSDT (RCCSDT), RCCSDT(Q), RCCSDTQ, and spin-unrestricted CCSDT (UCCSDT) within the PySCF package. The shared-memory","authors_text":"Christopher Hillenbrand, Huanchen Zhai, Timothy C. Berkelbach, Yu Jin","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.chem-ph","submitted_at":"2026-07-01T14:16:25Z","title":"High-performance parallel implementation of high-order coupled-cluster theories"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.00981","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":"sha256:4791960690d8f349f182510307d27131565210306daeabfa97a26a6bca1f6395","target":"record","created_at":"2026-07-02T01:18:25Z","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":"b5efcf24b1bfce27c0b4ea9287043c76a9942d663948d3770bc2cbc3ec30fbc3","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.chem-ph","submitted_at":"2026-07-01T14:16:25Z","title_canon_sha256":"d1720c5b92455bf603b7e53ed46278995f2da52b845b652d68de4b29b62ad8ee"},"schema_version":"1.0","source":{"id":"2607.00981","kind":"arxiv","version":1}},"canonical_sha256":"f8e4d1b638550f4c3bb064c0527db8b081248951e90e1e99a9f1b3c62b26c9c9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f8e4d1b638550f4c3bb064c0527db8b081248951e90e1e99a9f1b3c62b26c9c9","first_computed_at":"2026-07-02T01:18:25.109903Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-02T01:18:25.109903Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"oaVRydUAMQFRUCk4aBb5KdMGcDYecbO4I3MQ8OdbReo/oy9PlvaFXAkc0JqJZUFu9pvNObM1WHsu5M7gX7OABA==","signature_status":"signed_v1","signed_at":"2026-07-02T01:18:25.110257Z","signed_message":"canonical_sha256_bytes"},"source_id":"2607.00981","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4791960690d8f349f182510307d27131565210306daeabfa97a26a6bca1f6395","sha256:fef2f2d4aeb1b53359500e812d855611b7fae986b7347543c00cccfe144dc91b"],"state_sha256":"6dba170ecaae05e30603eab1d9c3a3b7cbc5d091b5aa27281e17c7882a8e2e96"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BeFjX1+vMXqP+Nje4aW5xd2KLkyj0mjxs/pkfzYKaWO7pmkb9nPMI3N+gzrtMbj+b046Ao5gqgdetxCPsovrCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-04T02:00:27.114842Z","bundle_sha256":"319902086ec561fff02f059695ca7d94219206717f9c87a28c7710d90f8feb86"}}