{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:CAMV3S6YGQY6G7RCFDDNDAK5JW","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":"ba2e9ba7554c419b6edfffdcc99601106996bdb399be4d1c50865629ab6320ae","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-02-22T20:18:02Z","title_canon_sha256":"0ae6e812aeeaabbdb6f6154531006d4749986467dd1694c94266cd27db85ca3d"},"schema_version":"1.0","source":{"id":"1802.08287","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.08287","created_at":"2026-05-18T00:22:44Z"},{"alias_kind":"arxiv_version","alias_value":"1802.08287v1","created_at":"2026-05-18T00:22:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.08287","created_at":"2026-05-18T00:22:44Z"},{"alias_kind":"pith_short_12","alias_value":"CAMV3S6YGQY6","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_16","alias_value":"CAMV3S6YGQY6G7RC","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_8","alias_value":"CAMV3S6Y","created_at":"2026-05-18T12:32:16Z"}],"graph_snapshots":[{"event_id":"sha256:e7424bfe9394dbf4d6591347ac1adc1fa689b54040333bd04b80f029c7b4ccef","target":"graph","created_at":"2026-05-18T00:22:44Z","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":"Quantum mechanics allows measurements that surpass the fundamental sensitivity limits of classical methods. To benefit from the quantum advantage in a practical setting, the receiver should use communication channels resources optimally; this can be done employing large communication alphabets. Here we show the fundamental sensitivity potential of a quantum receiver for coherent communication with frequency shift keying. We introduce an adaptive quantum protocol for this receiver, show that its sensitivity outperforms other receivers for alphabet sizes above 4 and scales favorably, whereas qua","authors_text":"I. A. Burenkov, O. V. Tikhonova, S. V. Polyakov","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-02-22T20:18:02Z","title":"Quantum receiver for large alphabet communication"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.08287","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":"sha256:1a30536805610d5a5a0cb7971012df1fb0a26759eb77f04f75cc8ca2f4209928","target":"record","created_at":"2026-05-18T00:22:44Z","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":"ba2e9ba7554c419b6edfffdcc99601106996bdb399be4d1c50865629ab6320ae","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-02-22T20:18:02Z","title_canon_sha256":"0ae6e812aeeaabbdb6f6154531006d4749986467dd1694c94266cd27db85ca3d"},"schema_version":"1.0","source":{"id":"1802.08287","kind":"arxiv","version":1}},"canonical_sha256":"10195dcbd83431e37e2228c6d1815d4d8e4a69e8c66dcacfe934c41fe9eca770","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"10195dcbd83431e37e2228c6d1815d4d8e4a69e8c66dcacfe934c41fe9eca770","first_computed_at":"2026-05-18T00:22:44.022968Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:22:44.022968Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"u+BG/1AaEYTn/MC5wJDOckvoyaEQclw/M4l+9rR9uTK+lmfGL+vryZY2DllcB4QpxHQeJFZ9uMCmTHVg1sduDA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:22:44.023495Z","signed_message":"canonical_sha256_bytes"},"source_id":"1802.08287","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1a30536805610d5a5a0cb7971012df1fb0a26759eb77f04f75cc8ca2f4209928","sha256:e7424bfe9394dbf4d6591347ac1adc1fa689b54040333bd04b80f029c7b4ccef"],"state_sha256":"f7376f886a9290e9ecd9e6b3d2392fa31f521c5aa01980c4b9c4b3546838c24d"}