{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:VEQ2YSVSBMXY2VFGNQFFBDSBX3","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":"7467ab035d2e910d34cb0782ac4e3220a40892ab7d7461ca2d94166a3d59db14","cross_cats_sorted":["cs.AR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2022-02-25T19:29:59Z","title_canon_sha256":"f7b99d26e53096a52ee3f8977f1436aab94234db81e1ce62d4ae9d8f1ab72057"},"schema_version":"1.0","source":{"id":"2202.12924","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2202.12924","created_at":"2026-07-05T06:55:47Z"},{"alias_kind":"arxiv_version","alias_value":"2202.12924v4","created_at":"2026-07-05T06:55:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2202.12924","created_at":"2026-07-05T06:55:47Z"},{"alias_kind":"pith_short_12","alias_value":"VEQ2YSVSBMXY","created_at":"2026-07-05T06:55:47Z"},{"alias_kind":"pith_short_16","alias_value":"VEQ2YSVSBMXY2VFG","created_at":"2026-07-05T06:55:47Z"},{"alias_kind":"pith_short_8","alias_value":"VEQ2YSVS","created_at":"2026-07-05T06:55:47Z"}],"graph_snapshots":[{"event_id":"sha256:22b7dd7b262128063d17ae84a660231f1d5a16f9ee5923afa358e62c667fad11","target":"graph","created_at":"2026-07-05T06:55:47Z","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/2202.12924/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"This work tackles the problem of finding a good ansatz initialization for Variational Quantum Algorithms (VQAs), by proposing CAFQA, a Clifford Ansatz For Quantum Accuracy. The CAFQA ansatz is a hardware-efficient circuit built with only Clifford gates. In this ansatz, the parameters for the tunable gates are chosen by searching efficiently through the Clifford parameter space via classical simulation. The resulting initial states always equal or outperform traditional classical initialization (e.g., Hartree-Fock), and enable high-accuracy VQA estimations. CAFQA is well-suited to classical com","authors_text":"Frederic T. Chong, Gokul Subramanian Ravi, Henry Hoffmann, Jonathan M. Baker, Kaitlin N. Smith, Kenneth R. Brown, Peter J. Love, Pranav Gokhale, William M. Kirby, Yi Ding","cross_cats":["cs.AR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2022-02-25T19:29:59Z","title":"CAFQA: A classical simulation bootstrap for variational quantum algorithms"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2202.12924","kind":"arxiv","version":4},"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:dbf983d7112dd37b10a772c89309bd90c68962b47216fc5035a3211eecbe3791","target":"record","created_at":"2026-07-05T06:55:47Z","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":"7467ab035d2e910d34cb0782ac4e3220a40892ab7d7461ca2d94166a3d59db14","cross_cats_sorted":["cs.AR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2022-02-25T19:29:59Z","title_canon_sha256":"f7b99d26e53096a52ee3f8977f1436aab94234db81e1ce62d4ae9d8f1ab72057"},"schema_version":"1.0","source":{"id":"2202.12924","kind":"arxiv","version":4}},"canonical_sha256":"a921ac4ab20b2f8d54a66c0a508e41bed902ba85696c7ee537bdb89fa2075ab8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a921ac4ab20b2f8d54a66c0a508e41bed902ba85696c7ee537bdb89fa2075ab8","first_computed_at":"2026-07-05T06:55:47.631626Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T06:55:47.631626Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"0tGqWELU9XHPsIsy8YRmMLNRQsX65shIfKFmjxgrmJBBXw24VI6QsEWK6ioiEVYHXzEJy/ig9q75TNbgIe0GCg==","signature_status":"signed_v1","signed_at":"2026-07-05T06:55:47.632063Z","signed_message":"canonical_sha256_bytes"},"source_id":"2202.12924","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dbf983d7112dd37b10a772c89309bd90c68962b47216fc5035a3211eecbe3791","sha256:22b7dd7b262128063d17ae84a660231f1d5a16f9ee5923afa358e62c667fad11"],"state_sha256":"1f7ed5ba36d1b6dc6b18c41ee80c455b4494fdb5455c489d70abb27bbe5400a4"}