{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:JCJYTVGCEPENZQGJ4XWSPN3PQD","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":"f3430f32b4eba280c6140073689391ba812fbb0012d67972dbc3debacf30430f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-03-23T08:14:45Z","title_canon_sha256":"2fb0a284fff7e668fd263a13c4b707616ae49633fa5692e277448bf34b45d0ed"},"schema_version":"1.0","source":{"id":"2103.12373","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2103.12373","created_at":"2026-07-05T02:25:46Z"},{"alias_kind":"arxiv_version","alias_value":"2103.12373v1","created_at":"2026-07-05T02:25:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2103.12373","created_at":"2026-07-05T02:25:46Z"},{"alias_kind":"pith_short_12","alias_value":"JCJYTVGCEPEN","created_at":"2026-07-05T02:25:46Z"},{"alias_kind":"pith_short_16","alias_value":"JCJYTVGCEPENZQGJ","created_at":"2026-07-05T02:25:46Z"},{"alias_kind":"pith_short_8","alias_value":"JCJYTVGC","created_at":"2026-07-05T02:25:46Z"}],"graph_snapshots":[{"event_id":"sha256:831d052058ddee77601b9a99ef4a37a7858a813dfad2d2af8dd803609383319d","target":"graph","created_at":"2026-07-05T02:25:46Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2103.12373/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"In optical metrological protocols to measure physical quantities, it is, in principle, always beneficial to increase photon number to improve measurement precision. However, practical constraints prevent arbitrary increase of n due to the imperfections of a practical detector, especially when the detector response is dominated by saturation effect. In this work, we show that a modified weak measurement protocol, namely, biased weak measurement significantly improves the precision of optical metrology in the presence of saturation effect. This method detects an ultra-small fraction of photons w","authors_text":"Chuan-Feng Li, Geng Chen, Gong-Chu Li, Guang-Can Guo, Jin-Shi Xu, Lei Chen, Liang Xu, Lijian Zhang, Ming Gong, Peng Yin, Wei-Feng Zhuang, Wen-Hao Zhang, Xing-Xiang Peng, Yu Ma, Ze-Gang Liu, Zong-Quan Zhou","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-03-23T08:14:45Z","title":"Improving the Precision of Optical Metrology by Detecting Fewer Photons"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2103.12373","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":"sha256:34cb105e6e429ec9edb9aedf6b814a1f578d43ab974aa72ff57c4f0c2d71fde4","target":"record","created_at":"2026-07-05T02:25:46Z","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":"f3430f32b4eba280c6140073689391ba812fbb0012d67972dbc3debacf30430f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-03-23T08:14:45Z","title_canon_sha256":"2fb0a284fff7e668fd263a13c4b707616ae49633fa5692e277448bf34b45d0ed"},"schema_version":"1.0","source":{"id":"2103.12373","kind":"arxiv","version":1}},"canonical_sha256":"489389d4c223c8dcc0c9e5ed27b76f80dc9980ea1d03dd7695b255617a7ceae2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"489389d4c223c8dcc0c9e5ed27b76f80dc9980ea1d03dd7695b255617a7ceae2","first_computed_at":"2026-07-05T02:25:46.077453Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:25:46.077453Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"49f8dkywEBS5OdO0kArB1pr6P0J799cnpI03Pxid6Jh5UMpAUZcniI29EDIS3jU7jI/MQHz0Syo9tg889UiWBw==","signature_status":"signed_v1","signed_at":"2026-07-05T02:25:46.078067Z","signed_message":"canonical_sha256_bytes"},"source_id":"2103.12373","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:34cb105e6e429ec9edb9aedf6b814a1f578d43ab974aa72ff57c4f0c2d71fde4","sha256:831d052058ddee77601b9a99ef4a37a7858a813dfad2d2af8dd803609383319d"],"state_sha256":"82887f187be0802a777db4e0c6d96474dc13d10abdb1a430733cfc0164dc8a2a"}