{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2026:POBI5PULFD4SLOOI64YKM34LZ6","short_pith_number":"pith:POBI5PUL","schema_version":"1.0","canonical_sha256":"7b828ebe8b28f925b9c8f730a66f8bcf8c1d1c636a0e02c552de37eca6cd011f","source":{"kind":"arxiv","id":"2608.07628","version":1},"attestation_state":"computed","paper":{"title":"Readout-Rank Laws for Isotropic Quantum Tangents","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cs.LG"],"primary_cat":"quant-ph","authors_text":"Marwan Ait Haddou","submitted_at":"2026-08-07T11:09:51Z","abstract_excerpt":"Deep parameterized quantum circuits may remain sensitive to a parameter change while the observables retained by a learning model barely respond. We study this separation for a fixed computational-basis measurement. For a pure-state tangent, we compare the quantum Fisher information $F_Q$, the Fisher information $F_{\\rm full}$ in the complete bitstring distribution, and the largest variance-normalized response $\\mathcal I_{\\mathcal A}$ available to a diagonal readout space $\\mathcal A$. If the joint state--tangent frame is Haar random, we prove that the two successive information fractions are"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2608.07628","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-08-07T11:09:51Z","cross_cats_sorted":["cs.LG"],"title_canon_sha256":"4fe5e58b541570ef0fa1473f73a5c03d9d008bc60cd13891f45ca0d0d6e68fa7","abstract_canon_sha256":"6d14ff4e812f418ade26b82acf47ecd9166fc4e5dc8fd610e1d57ece218d1f16"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-08-11T00:15:31.476767Z","signature_b64":"oE4KNCsHA+YHmTP6tOTwP9pPYn1ZosGyN5RzNtK7+F3LEzXmaLjOqblEJaDP0hCzwnQn6xKYaqXzHecAGPzyBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7b828ebe8b28f925b9c8f730a66f8bcf8c1d1c636a0e02c552de37eca6cd011f","last_reissued_at":"2026-08-11T00:15:31.474677Z","signature_status":"signed_v1","first_computed_at":"2026-08-11T00:15:31.474677Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Readout-Rank Laws for Isotropic Quantum Tangents","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cs.LG"],"primary_cat":"quant-ph","authors_text":"Marwan Ait Haddou","submitted_at":"2026-08-07T11:09:51Z","abstract_excerpt":"Deep parameterized quantum circuits may remain sensitive to a parameter change while the observables retained by a learning model barely respond. We study this separation for a fixed computational-basis measurement. For a pure-state tangent, we compare the quantum Fisher information $F_Q$, the Fisher information $F_{\\rm full}$ in the complete bitstring distribution, and the largest variance-normalized response $\\mathcal I_{\\mathcal A}$ available to a diagonal readout space $\\mathcal A$. If the joint state--tangent frame is Haar random, we prove that the two successive information fractions are"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2608.07628","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/2608.07628/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2608.07628","created_at":"2026-08-11T00:15:31.475020+00:00"},{"alias_kind":"arxiv_version","alias_value":"2608.07628v1","created_at":"2026-08-11T00:15:31.475020+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2608.07628","created_at":"2026-08-11T00:15:31.475020+00:00"},{"alias_kind":"pith_short_12","alias_value":"POBI5PULFD4S","created_at":"2026-08-11T00:15:31.475020+00:00"},{"alias_kind":"pith_short_16","alias_value":"POBI5PULFD4SLOOI","created_at":"2026-08-11T00:15:31.475020+00:00"},{"alias_kind":"pith_short_8","alias_value":"POBI5PUL","created_at":"2026-08-11T00:15:31.475020+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/POBI5PULFD4SLOOI64YKM34LZ6","json":"https://pith.science/pith/POBI5PULFD4SLOOI64YKM34LZ6.json","graph_json":"https://pith.science/api/pith-number/POBI5PULFD4SLOOI64YKM34LZ6/graph.json","events_json":"https://pith.science/api/pith-number/POBI5PULFD4SLOOI64YKM34LZ6/events.json","paper":"https://pith.science/paper/POBI5PUL"},"agent_actions":{"view_html":"https://pith.science/pith/POBI5PULFD4SLOOI64YKM34LZ6","download_json":"https://pith.science/pith/POBI5PULFD4SLOOI64YKM34LZ6.json","view_paper":"https://pith.science/paper/POBI5PUL","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2608.07628&json=true","fetch_graph":"https://pith.science/api/pith-number/POBI5PULFD4SLOOI64YKM34LZ6/graph.json","fetch_events":"https://pith.science/api/pith-number/POBI5PULFD4SLOOI64YKM34LZ6/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/POBI5PULFD4SLOOI64YKM34LZ6/action/timestamp_anchor","attest_storage":"https://pith.science/pith/POBI5PULFD4SLOOI64YKM34LZ6/action/storage_attestation","attest_author":"https://pith.science/pith/POBI5PULFD4SLOOI64YKM34LZ6/action/author_attestation","sign_citation":"https://pith.science/pith/POBI5PULFD4SLOOI64YKM34LZ6/action/citation_signature","submit_replication":"https://pith.science/pith/POBI5PULFD4SLOOI64YKM34LZ6/action/replication_record"}},"created_at":"2026-08-11T00:15:31.475020+00:00","updated_at":"2026-08-11T00:15:31.475020+00:00"}