{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:7FQLCA3KNGC4CDC3H3XXNROSMK","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":"51ab1ada8836c9f5640cca1605dd8f14db778b8f8956c66da0d696759acbdf1c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-06-07T10:57:02Z","title_canon_sha256":"99621caa6bc0f4e96404b1b4039586f9bb06ca1b0c9d79b2e012c1cc4a897db0"},"schema_version":"1.0","source":{"id":"1706.02125","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1706.02125","created_at":"2026-05-18T00:23:16Z"},{"alias_kind":"arxiv_version","alias_value":"1706.02125v2","created_at":"2026-05-18T00:23:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1706.02125","created_at":"2026-05-18T00:23:16Z"},{"alias_kind":"pith_short_12","alias_value":"7FQLCA3KNGC4","created_at":"2026-05-18T12:31:05Z"},{"alias_kind":"pith_short_16","alias_value":"7FQLCA3KNGC4CDC3","created_at":"2026-05-18T12:31:05Z"},{"alias_kind":"pith_short_8","alias_value":"7FQLCA3K","created_at":"2026-05-18T12:31:05Z"}],"graph_snapshots":[{"event_id":"sha256:9c0c03c7afc0fd56b01c2bd11dd5f19ae7f0b9f000e8953f4956b70c221541fa","target":"graph","created_at":"2026-05-18T00:23:16Z","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":"It is well known that a minimum error quantum measurement for arbitrary binary optical coherent states can be realized by a receiver that comprises interfering with a coherent reference light, photon counting, and feedback control. We show that, for ternary optical coherent states, a minimum error measurement cannot always be realized by such a receiver. The problem of finding an upper bound on the maximum success probability of such a receiver can be formulated as a convex programming. We derive its dual problem and numerically find the upper bound. At least for ternary phase-shift keyed cohe","authors_text":"Kenji Nakahira, Kentaro Kato, Tsuyoshi Sasaki Usuda","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-06-07T10:57:02Z","title":"Optimal discrimination of optical coherent states cannot always be realized by interfering with coherent light, photon counting, and feedback"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1706.02125","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":"sha256:0815bb967f9de12d91f2e9a830af0c72e727340dc8175535683ed872748cc92e","target":"record","created_at":"2026-05-18T00:23:16Z","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":"51ab1ada8836c9f5640cca1605dd8f14db778b8f8956c66da0d696759acbdf1c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-06-07T10:57:02Z","title_canon_sha256":"99621caa6bc0f4e96404b1b4039586f9bb06ca1b0c9d79b2e012c1cc4a897db0"},"schema_version":"1.0","source":{"id":"1706.02125","kind":"arxiv","version":2}},"canonical_sha256":"f960b1036a6985c10c5b3eef76c5d2629d688c5d0893823db00ff815206f2833","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f960b1036a6985c10c5b3eef76c5d2629d688c5d0893823db00ff815206f2833","first_computed_at":"2026-05-18T00:23:16.833909Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:23:16.833909Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"4IKkpyx0xRWA7je7nyMI86CB59BulZoGzSB2RbRyCql9F9I+XPWGRjQtrRIwwKy66qWAGkSLY8BRL1M80FJVDw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:23:16.834559Z","signed_message":"canonical_sha256_bytes"},"source_id":"1706.02125","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0815bb967f9de12d91f2e9a830af0c72e727340dc8175535683ed872748cc92e","sha256:9c0c03c7afc0fd56b01c2bd11dd5f19ae7f0b9f000e8953f4956b70c221541fa"],"state_sha256":"1845b0d5862acbe1b926fe27811d133ab26773c4765135a8541d2041a26b0700"}