{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:WP7AXQAO55HTCDSGRVRVT5KMCW","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":"d837633a3ac0187de6f7a07e5e2c5a25a3ad2f3d8aa0d6143c12f2e89fce66a0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-12-13T21:18:43Z","title_canon_sha256":"0a5d72bb2c01a37398bda3d105574511443e4caf2a504f738cc73a2b4c192860"},"schema_version":"1.0","source":{"id":"1912.06718","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1912.06718","created_at":"2026-07-05T02:37:02Z"},{"alias_kind":"arxiv_version","alias_value":"1912.06718v2","created_at":"2026-07-05T02:37:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1912.06718","created_at":"2026-07-05T02:37:02Z"},{"alias_kind":"pith_short_12","alias_value":"WP7AXQAO55HT","created_at":"2026-07-05T02:37:02Z"},{"alias_kind":"pith_short_16","alias_value":"WP7AXQAO55HTCDSG","created_at":"2026-07-05T02:37:02Z"},{"alias_kind":"pith_short_8","alias_value":"WP7AXQAO","created_at":"2026-07-05T02:37:02Z"}],"graph_snapshots":[{"event_id":"sha256:3540034158bdb1a842a212dc06565bdc38085c3bddeea8feaf965fa9e8aa6bc3","target":"graph","created_at":"2026-07-05T02:37:02Z","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/1912.06718/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Understanding the fundamental sensitivity limit of an optical sensor requires a full quantum mechanical description of the sensing task. In this work, we calculate the fundamental (quantum) limit for discriminating between pure laser light and thermal noise in a photon-starved regime. The Helstrom bound for discrimination error probability for single mode measurement is computed along with error probability bounds for direct detection, coherent homodyne detection and the Kennedy receiver. A generalized Kennedy (GK) receiver is shown to closely approach the Helstrom limit. We present an experim","authors_text":"Arunkumar Jagannathan, Jonathan L. Habif, Phoebe Amory, Saikat Guha, Samuel Gartenstein","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-12-13T21:18:43Z","title":"Quantum-limited discrimination of laser light and thermal light"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1912.06718","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:a15aea07cb58d1873e5d6a1a4c18170ba4803ea767fe2e56ab7eb4f1e4a626cd","target":"record","created_at":"2026-07-05T02:37:02Z","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":"d837633a3ac0187de6f7a07e5e2c5a25a3ad2f3d8aa0d6143c12f2e89fce66a0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-12-13T21:18:43Z","title_canon_sha256":"0a5d72bb2c01a37398bda3d105574511443e4caf2a504f738cc73a2b4c192860"},"schema_version":"1.0","source":{"id":"1912.06718","kind":"arxiv","version":2}},"canonical_sha256":"b3fe0bc00eef4f310e468d6359f54c1581435c685b33fd9110c051538153a36f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b3fe0bc00eef4f310e468d6359f54c1581435c685b33fd9110c051538153a36f","first_computed_at":"2026-07-05T02:37:02.454119Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:37:02.454119Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jq6pTj1TWALH+hOQTxAiqtsAlYypQKCw9o5WYExSdqPM4CyU7VqEQOnJLdlzV9Avw2oR4IrrvVxJDJ3R3tVxDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T02:37:02.454526Z","signed_message":"canonical_sha256_bytes"},"source_id":"1912.06718","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a15aea07cb58d1873e5d6a1a4c18170ba4803ea767fe2e56ab7eb4f1e4a626cd","sha256:3540034158bdb1a842a212dc06565bdc38085c3bddeea8feaf965fa9e8aa6bc3"],"state_sha256":"886f5060203b4a4c982e0e2f169e5325a2c56429d22c097ff9c5f86cf3e7d6df"}