{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:RE5DCF7YXPEFLIRKNWE2PCQB43","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":"0e883ebbcde729cd2033de9de983a68255a8f505ff017fcb95d45d9a01715a25","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2022-08-17T14:29:28Z","title_canon_sha256":"d1cf1eeaa483964c177c8d490869c05bcd5a792c3ba0467666b2d3720ee8421e"},"schema_version":"1.0","source":{"id":"2208.08316","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2208.08316","created_at":"2026-07-05T05:43:53Z"},{"alias_kind":"arxiv_version","alias_value":"2208.08316v2","created_at":"2026-07-05T05:43:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2208.08316","created_at":"2026-07-05T05:43:53Z"},{"alias_kind":"pith_short_12","alias_value":"RE5DCF7YXPEF","created_at":"2026-07-05T05:43:53Z"},{"alias_kind":"pith_short_16","alias_value":"RE5DCF7YXPEFLIRK","created_at":"2026-07-05T05:43:53Z"},{"alias_kind":"pith_short_8","alias_value":"RE5DCF7Y","created_at":"2026-07-05T05:43:53Z"}],"graph_snapshots":[{"event_id":"sha256:c01c25125d3e076434ff035f51b2f38278e780f0b4e964a7503efb809e095cf1","target":"graph","created_at":"2026-07-05T05:43:53Z","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/2208.08316/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Interferometers are crucial for precision measurements, including gravitational waves, laser ranging, radar, and imaging. The phase sensitivity, the core parameter, can be quantum-enhanced to break the standard quantum limit (SQL) using quantum states. However, quantum states are highly fragile and quickly degrade with losses. We design and demonstrate a quantum interferometer utilizing a beam splitter with a variable splitting ratio to protect the quantum resource against environmental impacts. The optimal phase sensitivity can reach the quantum Cram\\'{e}r-Rao bound of the system. This quantu","authors_text":"Baiqiang Zhu, Chun-Hua Yuan, Liqing Chen, Weiping Zhang, Wenfeng Huang, Xinyun Liang, Yuhan Yan","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2022-08-17T14:29:28Z","title":"Protection of noise squeezing in a quantum interferometer with optimal resource allocation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2208.08316","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":"sha256:8bca9800326e9de20a7a771a33322495e447c5c6f277a0896ffa556a7d2ed618","target":"record","created_at":"2026-07-05T05:43:53Z","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":"0e883ebbcde729cd2033de9de983a68255a8f505ff017fcb95d45d9a01715a25","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2022-08-17T14:29:28Z","title_canon_sha256":"d1cf1eeaa483964c177c8d490869c05bcd5a792c3ba0467666b2d3720ee8421e"},"schema_version":"1.0","source":{"id":"2208.08316","kind":"arxiv","version":2}},"canonical_sha256":"893a3117f8bbc855a22a6d89a78a01e6e4e6fcd8a5048d888485236cc1cd3e31","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"893a3117f8bbc855a22a6d89a78a01e6e4e6fcd8a5048d888485236cc1cd3e31","first_computed_at":"2026-07-05T05:43:53.363027Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T05:43:53.363027Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"9DlRVB1GDXzAANmkYQCgFjb9H3YW5nNSu6RdOxE56GiucREZ4dm1iafDlXbD8fMFXKkvgM8VRX/ELI9E6U7VCw==","signature_status":"signed_v1","signed_at":"2026-07-05T05:43:53.363572Z","signed_message":"canonical_sha256_bytes"},"source_id":"2208.08316","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8bca9800326e9de20a7a771a33322495e447c5c6f277a0896ffa556a7d2ed618","sha256:c01c25125d3e076434ff035f51b2f38278e780f0b4e964a7503efb809e095cf1"],"state_sha256":"d7ffef75cd518623a7a7a15299b82d9d66254a399559661cf072eca50aceab2a"}