{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:VNEP3DEPHM2VW7DMMRV2ZPNBEO","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":"4a9da519c0c13310950a7cb41f9803fe78dcd852de12d5738545138494bbea57","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-08-11T02:27:14Z","title_canon_sha256":"b51554ba086160d83023623979711ef30e4d5f0524e07a9108fedfecf30beb19"},"schema_version":"1.0","source":{"id":"1908.03838","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.03838","created_at":"2026-07-05T01:14:27Z"},{"alias_kind":"arxiv_version","alias_value":"1908.03838v1","created_at":"2026-07-05T01:14:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.03838","created_at":"2026-07-05T01:14:27Z"},{"alias_kind":"pith_short_12","alias_value":"VNEP3DEPHM2V","created_at":"2026-07-05T01:14:27Z"},{"alias_kind":"pith_short_16","alias_value":"VNEP3DEPHM2VW7DM","created_at":"2026-07-05T01:14:27Z"},{"alias_kind":"pith_short_8","alias_value":"VNEP3DEP","created_at":"2026-07-05T01:14:27Z"}],"graph_snapshots":[{"event_id":"sha256:5795468009afdbaf565f9b2967a45fdb18d53c6c55c00a291783290d53088d69","target":"graph","created_at":"2026-07-05T01:14:27Z","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/1908.03838/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We investigate the frequency estimation of an optical field suffering from an unavoidable dissipative environment. Generally, dissipative noises greatly reduce the precision. Here, we find that two-photon driving can improve the measurement precision by resisting the noises. Moreover, in long time, the uncertainty of frequency can be close to 0 with a proper magnitude of the parametric two-photon drive, which is in sharp contrast to the uncertainty going to infinity without the two-photon driving. Our results show that two-photon driving can realize the ultrasensitive measurement in dissipativ","authors_text":"Chunling Xu, Dong Xie","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-08-11T02:27:14Z","title":"Enhancing parameter estimation precision in dissipative environment with two-photon driving"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.03838","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:df0f75963d6fbd5688682884bfefd0c8ebfcf3c287fcf59d4afd48b2f03d84e1","target":"record","created_at":"2026-07-05T01:14:27Z","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":"4a9da519c0c13310950a7cb41f9803fe78dcd852de12d5738545138494bbea57","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-08-11T02:27:14Z","title_canon_sha256":"b51554ba086160d83023623979711ef30e4d5f0524e07a9108fedfecf30beb19"},"schema_version":"1.0","source":{"id":"1908.03838","kind":"arxiv","version":1}},"canonical_sha256":"ab48fd8c8f3b355b7c6c646bacbda123ad7e61fce0e9a57d3c105cc370ea5d2a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ab48fd8c8f3b355b7c6c646bacbda123ad7e61fce0e9a57d3c105cc370ea5d2a","first_computed_at":"2026-07-05T01:14:27.239754Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:14:27.239754Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NGN+d5ZxTfO79NZKw+E0BFKWWxX0eRjwli0f7Wo6A6c+GkdK8nYn0OLq5qsZGZF2x41UdkMxP2wzeHUlnQwgBw==","signature_status":"signed_v1","signed_at":"2026-07-05T01:14:27.240241Z","signed_message":"canonical_sha256_bytes"},"source_id":"1908.03838","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:df0f75963d6fbd5688682884bfefd0c8ebfcf3c287fcf59d4afd48b2f03d84e1","sha256:5795468009afdbaf565f9b2967a45fdb18d53c6c55c00a291783290d53088d69"],"state_sha256":"bd54a302fbea045565062bd6192b4a0e80a5c2c49831ae0900ff4418495c1509"}