{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:RJHQIBISOMFI3OVRV2WN647GL7","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":"ad2cbde35e7205b3b02e23c8eac03be19df20aae1bdc469608299eab6d410b06","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-01-22T12:51:58Z","title_canon_sha256":"df538d6ce198a476c5c3de89fb8462e16cd39dd9f2190271eab72f62486905d4"},"schema_version":"1.0","source":{"id":"1801.07071","kind":"arxiv","version":5}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.07071","created_at":"2026-05-18T00:04:30Z"},{"alias_kind":"arxiv_version","alias_value":"1801.07071v5","created_at":"2026-05-18T00:04:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.07071","created_at":"2026-05-18T00:04:30Z"},{"alias_kind":"pith_short_12","alias_value":"RJHQIBISOMFI","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_16","alias_value":"RJHQIBISOMFI3OVR","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_8","alias_value":"RJHQIBIS","created_at":"2026-05-18T12:32:50Z"}],"graph_snapshots":[{"event_id":"sha256:11dea7653edf27f2006f1861c1167491bc8e4d516d62587af6f0036601ca62c9","target":"graph","created_at":"2026-05-18T00:04:30Z","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 address the framework of analysing quantum metrology in the information-theoretic picture. Firstly we show how to extract the maximum amount of information in general via suitable state initialization of the probes at the beginning and a quantum measurement at the end. Our analysis can apply to both the single-parameter and the multi-parameter estimation procedures as well as to any other quantum information processing procedures. We then establish a direct connection between the information-theoretic picture of quantum metrology and its conventional variance-covariance picture, by showing ","authors_text":"Heng Fan, Yi Peng","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-01-22T12:51:58Z","title":"Information Theoretical Analysis of Quantum Metrology"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.07071","kind":"arxiv","version":5},"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":"sha256:5bf4449354690fa5890eebc31e8f6521218458e295265e276b1db14df281f37b","target":"record","created_at":"2026-05-18T00:04:30Z","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":"ad2cbde35e7205b3b02e23c8eac03be19df20aae1bdc469608299eab6d410b06","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-01-22T12:51:58Z","title_canon_sha256":"df538d6ce198a476c5c3de89fb8462e16cd39dd9f2190271eab72f62486905d4"},"schema_version":"1.0","source":{"id":"1801.07071","kind":"arxiv","version":5}},"canonical_sha256":"8a4f040512730a8dbab1aeacdf73e65ffc0ca60dacb81ac748574b16fdfa4b22","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8a4f040512730a8dbab1aeacdf73e65ffc0ca60dacb81ac748574b16fdfa4b22","first_computed_at":"2026-05-18T00:04:30.369931Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:04:30.369931Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"K4CZSVSxvOVQhoFcpL+BwDer3O6e9X/Fby091RCNdOB+UHkgpYpkMyBTHIbbk8Ygg3ydA6f98A20adeUf8hbBA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:04:30.370397Z","signed_message":"canonical_sha256_bytes"},"source_id":"1801.07071","source_kind":"arxiv","source_version":5}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5bf4449354690fa5890eebc31e8f6521218458e295265e276b1db14df281f37b","sha256:11dea7653edf27f2006f1861c1167491bc8e4d516d62587af6f0036601ca62c9"],"state_sha256":"0df4dc30c7cf85b52b91200d7acdc8049b142a3e3750e8909d1741fbacb93c3d"}