{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:BPEI4JLJC3W5EBCFV2LUJBOLPZ","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":"5e13c33bb71f2d3cb0781c252ae5455e8ed7b8c73d616d93f8d68ac4a496f2be","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-06-21T06:02:58Z","title_canon_sha256":"32a5988ee0e6551fb24af399a7cce2b527e8e09bf3f1ca7be735d286e7a4c353"},"schema_version":"1.0","source":{"id":"1806.08073","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1806.08073","created_at":"2026-05-18T00:01:29Z"},{"alias_kind":"arxiv_version","alias_value":"1806.08073v1","created_at":"2026-05-18T00:01:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1806.08073","created_at":"2026-05-18T00:01:29Z"},{"alias_kind":"pith_short_12","alias_value":"BPEI4JLJC3W5","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_16","alias_value":"BPEI4JLJC3W5EBCF","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_8","alias_value":"BPEI4JLJ","created_at":"2026-05-18T12:32:16Z"}],"graph_snapshots":[{"event_id":"sha256:ce0dc51bffe431b1841ea508c32f041cdc0b146cf02e160ee3d9b1d66d229bc9","target":"graph","created_at":"2026-05-18T00:01:29Z","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":"Modular values are quantities that described by pre- and postselected states of quantum systems like weak values but are different from them: The associated interaction is not necessary to be weak. We discuss an optimal modular-value-based measurement with a spin coherent pointer: A quantum system is exposed to a field in which strength is to be estimated through its modular value. We consider two cases, with a two-dimensional and a higher-dimensional pointer, and evaluate the quantum Fisher information. The modular-value-based measurement has no merit in the former case, while its sensitivity","authors_text":"Le Bin Ho, Yasushi Kondo","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-06-21T06:02:58Z","title":"Modular-value-based metrology with spin coherent pointers"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1806.08073","kind":"arxiv","version":1},"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":"sha256:33fe3f27ad5f2eabf3e0244f50ad763ea0e9e60a618e33d8c7c6bed0e50638da","target":"record","created_at":"2026-05-18T00:01:29Z","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":"5e13c33bb71f2d3cb0781c252ae5455e8ed7b8c73d616d93f8d68ac4a496f2be","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-06-21T06:02:58Z","title_canon_sha256":"32a5988ee0e6551fb24af399a7cce2b527e8e09bf3f1ca7be735d286e7a4c353"},"schema_version":"1.0","source":{"id":"1806.08073","kind":"arxiv","version":1}},"canonical_sha256":"0bc88e256916edd20445ae974485cb7e494f8a5a0d4fda1358ef12005bb4f2b9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0bc88e256916edd20445ae974485cb7e494f8a5a0d4fda1358ef12005bb4f2b9","first_computed_at":"2026-05-18T00:01:29.250193Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:01:29.250193Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Gd9Ctl5D4tH4g97ekSYbEZmSMQZFqjppjoIoxf9RHFjPr1+V4vydUv3FKu5VYh89fQFqHJX66yPCBd9Uny7MDg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:01:29.250735Z","signed_message":"canonical_sha256_bytes"},"source_id":"1806.08073","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:33fe3f27ad5f2eabf3e0244f50ad763ea0e9e60a618e33d8c7c6bed0e50638da","sha256:ce0dc51bffe431b1841ea508c32f041cdc0b146cf02e160ee3d9b1d66d229bc9"],"state_sha256":"bafb0dd410ac5394771e0be4a9838851d7cdef7e230917a4187abeb958cc8130"}