{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:PIMEWYNJMK536DNXYI3OXKNMVR","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":"b7d1c7cc1bb393756d9c7188f042274ad64c4441366e695326449dfee66ce5de","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-07-24T16:18:46Z","title_canon_sha256":"0a29ec93dcc3df3f0e376ea526004e56f93801377baaab62b0093f6eff1395ad"},"schema_version":"1.0","source":{"id":"1507.06904","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.06904","created_at":"2026-05-18T01:15:15Z"},{"alias_kind":"arxiv_version","alias_value":"1507.06904v2","created_at":"2026-05-18T01:15:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.06904","created_at":"2026-05-18T01:15:15Z"},{"alias_kind":"pith_short_12","alias_value":"PIMEWYNJMK53","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_16","alias_value":"PIMEWYNJMK536DNX","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_8","alias_value":"PIMEWYNJ","created_at":"2026-05-18T12:29:37Z"}],"graph_snapshots":[{"event_id":"sha256:19a6e5394a95997e5045eb66c88bfde2263d1f976dd72f87296ec6b571361c43","target":"graph","created_at":"2026-05-18T01:15:15Z","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"},"paper":{"abstract_excerpt":"We introduce a new kind of quantum measurement that is defined to be symmetric in the sense of uniform Fisher information across a set of parameters that injectively represent pure quantum states in the neighborhood of a fiducial pure state. The measurement is locally informationally complete---i.e., it uniquely determines these parameters, as opposed to distinguishing two arbitrary quantum states---and it is maximal in the sense of a multi-parameter quantum Cramer-Rao bound. For a $d$-dimensional quantum system, requiring only local informational completeness allows us to reduce the number of","authors_text":"Amir Kalev, Carlton M. Caves, Christopher Ferrie, Jonathan A. Gross, Nan Li","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-07-24T16:18:46Z","title":"Fisher-symmetric informationally complete measurements for pure states"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.06904","kind":"arxiv","version":2},"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":"sha256:9a96db877121ea2772ad8fd33a44f3a75f93b3b41e8144dfe7c24e11aaba2aae","target":"record","created_at":"2026-05-18T01:15:15Z","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":"b7d1c7cc1bb393756d9c7188f042274ad64c4441366e695326449dfee66ce5de","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-07-24T16:18:46Z","title_canon_sha256":"0a29ec93dcc3df3f0e376ea526004e56f93801377baaab62b0093f6eff1395ad"},"schema_version":"1.0","source":{"id":"1507.06904","kind":"arxiv","version":2}},"canonical_sha256":"7a184b61a962bbbf0db7c236eba9acac5f0b626bc0430ad82a33455e730de734","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7a184b61a962bbbf0db7c236eba9acac5f0b626bc0430ad82a33455e730de734","first_computed_at":"2026-05-18T01:15:15.150102Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:15:15.150102Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"RyN9MyoE45WsMVe6/YPQ1xHjuONrDeBv/Dg6A3PopDLG5CiNcu4VNgH8yTQtKIVFogcxtUKQgnao+/y0VX0ZDA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:15:15.150812Z","signed_message":"canonical_sha256_bytes"},"source_id":"1507.06904","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9a96db877121ea2772ad8fd33a44f3a75f93b3b41e8144dfe7c24e11aaba2aae","sha256:19a6e5394a95997e5045eb66c88bfde2263d1f976dd72f87296ec6b571361c43"],"state_sha256":"297868d0eb5c7c59a795460fcde2bdbc52ad9bb6768db1d6bb3e2c2e40156908"}