{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:LBK3ITCYKFDQZRK2IGY4BXEQJ5","short_pith_number":"pith:LBK3ITCY","schema_version":"1.0","canonical_sha256":"5855b44c5851470cc55a41b1c0dc904f50f94f5e1da2f744eb66e6071ee05a0a","source":{"kind":"arxiv","id":"1804.10792","version":1},"attestation_state":"computed","paper":{"title":"Optimal weak measurements: Mixed States","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"N.D. Hari Dass, R. Rajath Krishna","submitted_at":"2018-04-28T12:15:55Z","abstract_excerpt":"In an earlier publication we had given an exhaustive analysis of the criteria for weak value measurements of pure states to be optimal in the sense considered by Wootters and Fields. We had proved, for arbitrary spin cases, that the measurements are optimal when the post-selected state is mutually unbiased wrt the eigenstates of the observable being measured.Here we extend the discussion to mixed states. For these, weak value measurements have several problems which we illustrate with the protocol proposed by Shengjun Wu. We discuss tomography of mixed states based on weak measurements and sho"},"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":"1804.10792","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-04-28T12:15:55Z","cross_cats_sorted":[],"title_canon_sha256":"c6b451e7a536492dc1683cc94495742f796cbca3dbdc85c55892b5b5f53dfc34","abstract_canon_sha256":"e8778dadcecfb23df705cbda4b27e6098bedcf6d6778505572d976e2dcfdaa38"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:17:15.546303Z","signature_b64":"w1P9NgOim3ZAk0ZVSvfoHikN5blQVEmmLTISeQ6FQZU7w5q9pbVa1e7RPF4arCDrXMwgN38fG0hGq5LSsEBICQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5855b44c5851470cc55a41b1c0dc904f50f94f5e1da2f744eb66e6071ee05a0a","last_reissued_at":"2026-05-18T00:17:15.545761Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:17:15.545761Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Optimal weak measurements: Mixed States","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"N.D. Hari Dass, R. Rajath Krishna","submitted_at":"2018-04-28T12:15:55Z","abstract_excerpt":"In an earlier publication we had given an exhaustive analysis of the criteria for weak value measurements of pure states to be optimal in the sense considered by Wootters and Fields. We had proved, for arbitrary spin cases, that the measurements are optimal when the post-selected state is mutually unbiased wrt the eigenstates of the observable being measured.Here we extend the discussion to mixed states. For these, weak value measurements have several problems which we illustrate with the protocol proposed by Shengjun Wu. We discuss tomography of mixed states based on weak measurements and sho"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.10792","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":""},"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":"1804.10792","created_at":"2026-05-18T00:17:15.545824+00:00"},{"alias_kind":"arxiv_version","alias_value":"1804.10792v1","created_at":"2026-05-18T00:17:15.545824+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.10792","created_at":"2026-05-18T00:17:15.545824+00:00"},{"alias_kind":"pith_short_12","alias_value":"LBK3ITCYKFDQ","created_at":"2026-05-18T12:32:33.847187+00:00"},{"alias_kind":"pith_short_16","alias_value":"LBK3ITCYKFDQZRK2","created_at":"2026-05-18T12:32:33.847187+00:00"},{"alias_kind":"pith_short_8","alias_value":"LBK3ITCY","created_at":"2026-05-18T12:32:33.847187+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/LBK3ITCYKFDQZRK2IGY4BXEQJ5","json":"https://pith.science/pith/LBK3ITCYKFDQZRK2IGY4BXEQJ5.json","graph_json":"https://pith.science/api/pith-number/LBK3ITCYKFDQZRK2IGY4BXEQJ5/graph.json","events_json":"https://pith.science/api/pith-number/LBK3ITCYKFDQZRK2IGY4BXEQJ5/events.json","paper":"https://pith.science/paper/LBK3ITCY"},"agent_actions":{"view_html":"https://pith.science/pith/LBK3ITCYKFDQZRK2IGY4BXEQJ5","download_json":"https://pith.science/pith/LBK3ITCYKFDQZRK2IGY4BXEQJ5.json","view_paper":"https://pith.science/paper/LBK3ITCY","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1804.10792&json=true","fetch_graph":"https://pith.science/api/pith-number/LBK3ITCYKFDQZRK2IGY4BXEQJ5/graph.json","fetch_events":"https://pith.science/api/pith-number/LBK3ITCYKFDQZRK2IGY4BXEQJ5/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/LBK3ITCYKFDQZRK2IGY4BXEQJ5/action/timestamp_anchor","attest_storage":"https://pith.science/pith/LBK3ITCYKFDQZRK2IGY4BXEQJ5/action/storage_attestation","attest_author":"https://pith.science/pith/LBK3ITCYKFDQZRK2IGY4BXEQJ5/action/author_attestation","sign_citation":"https://pith.science/pith/LBK3ITCYKFDQZRK2IGY4BXEQJ5/action/citation_signature","submit_replication":"https://pith.science/pith/LBK3ITCYKFDQZRK2IGY4BXEQJ5/action/replication_record"}},"created_at":"2026-05-18T00:17:15.545824+00:00","updated_at":"2026-05-18T00:17:15.545824+00:00"}