{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2024:XBVQFUSNVZXK66VC5EKJAH7ROV","short_pith_number":"pith:XBVQFUSN","schema_version":"1.0","canonical_sha256":"b86b02d24dae6eaf7aa2e914901ff175682191a63258264bbecd8cba8cfdbfc5","source":{"kind":"arxiv","id":"2412.02120","version":1},"attestation_state":"computed","paper":{"title":"Ptychographic estimation of pure multiqubit states in a quantum device","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Leonardo Neves, Warley M. S. Alves","submitted_at":"2024-12-03T03:18:23Z","abstract_excerpt":"Quantum ptychography is a method for estimating an unknown pure quantum state by subjecting it to overlapping projections, each one followed by a projective measurement on a single prescribed basis. Here, we present a comprehensive study of this method applied for estimating $n$-qubit states in a circuit-based quantum computer, including numerical simulations and experiments carried out on an IBM superconducting quantum processor. The intermediate projections are implemented through Pauli measurements on one qubit at a time, which sets the number of ptychographic circuits to $3n$ (in contrast "},"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":"2412.02120","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"quant-ph","submitted_at":"2024-12-03T03:18:23Z","cross_cats_sorted":[],"title_canon_sha256":"8f8cc1544415f5a525c1b9d1ef6c2924d64232e6a5add5d162281b5ddeb4e54b","abstract_canon_sha256":"ac263905e228a7aa2e069f7e20c74a15fb0ec1b46e899d23d40d3310b3c71be4"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T09:43:44.255711Z","signature_b64":"jvr6AKlyqJ41+9uB+TOyZjb+OEjKY4YjpnK22c/nyieRHDmfMbs6G8xnO5kyuJr3u38660SpgjsPmhlnUQcKAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b86b02d24dae6eaf7aa2e914901ff175682191a63258264bbecd8cba8cfdbfc5","last_reissued_at":"2026-07-05T09:43:44.255135Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T09:43:44.255135Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Ptychographic estimation of pure multiqubit states in a quantum device","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Leonardo Neves, Warley M. S. Alves","submitted_at":"2024-12-03T03:18:23Z","abstract_excerpt":"Quantum ptychography is a method for estimating an unknown pure quantum state by subjecting it to overlapping projections, each one followed by a projective measurement on a single prescribed basis. Here, we present a comprehensive study of this method applied for estimating $n$-qubit states in a circuit-based quantum computer, including numerical simulations and experiments carried out on an IBM superconducting quantum processor. The intermediate projections are implemented through Pauli measurements on one qubit at a time, which sets the number of ptychographic circuits to $3n$ (in contrast "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2412.02120","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/2412.02120/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":"2412.02120","created_at":"2026-07-05T09:43:44.255192+00:00"},{"alias_kind":"arxiv_version","alias_value":"2412.02120v1","created_at":"2026-07-05T09:43:44.255192+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2412.02120","created_at":"2026-07-05T09:43:44.255192+00:00"},{"alias_kind":"pith_short_12","alias_value":"XBVQFUSNVZXK","created_at":"2026-07-05T09:43:44.255192+00:00"},{"alias_kind":"pith_short_16","alias_value":"XBVQFUSNVZXK66VC","created_at":"2026-07-05T09:43:44.255192+00:00"},{"alias_kind":"pith_short_8","alias_value":"XBVQFUSN","created_at":"2026-07-05T09:43:44.255192+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/XBVQFUSNVZXK66VC5EKJAH7ROV","json":"https://pith.science/pith/XBVQFUSNVZXK66VC5EKJAH7ROV.json","graph_json":"https://pith.science/api/pith-number/XBVQFUSNVZXK66VC5EKJAH7ROV/graph.json","events_json":"https://pith.science/api/pith-number/XBVQFUSNVZXK66VC5EKJAH7ROV/events.json","paper":"https://pith.science/paper/XBVQFUSN"},"agent_actions":{"view_html":"https://pith.science/pith/XBVQFUSNVZXK66VC5EKJAH7ROV","download_json":"https://pith.science/pith/XBVQFUSNVZXK66VC5EKJAH7ROV.json","view_paper":"https://pith.science/paper/XBVQFUSN","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2412.02120&json=true","fetch_graph":"https://pith.science/api/pith-number/XBVQFUSNVZXK66VC5EKJAH7ROV/graph.json","fetch_events":"https://pith.science/api/pith-number/XBVQFUSNVZXK66VC5EKJAH7ROV/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/XBVQFUSNVZXK66VC5EKJAH7ROV/action/timestamp_anchor","attest_storage":"https://pith.science/pith/XBVQFUSNVZXK66VC5EKJAH7ROV/action/storage_attestation","attest_author":"https://pith.science/pith/XBVQFUSNVZXK66VC5EKJAH7ROV/action/author_attestation","sign_citation":"https://pith.science/pith/XBVQFUSNVZXK66VC5EKJAH7ROV/action/citation_signature","submit_replication":"https://pith.science/pith/XBVQFUSNVZXK66VC5EKJAH7ROV/action/replication_record"}},"created_at":"2026-07-05T09:43:44.255192+00:00","updated_at":"2026-07-05T09:43:44.255192+00:00"}