{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:LCZO4CTLF6O4RTUMDXPMQMMO2Y","short_pith_number":"pith:LCZO4CTL","canonical_record":{"source":{"id":"1308.2036","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-08-09T06:04:24Z","cross_cats_sorted":[],"title_canon_sha256":"7eae30ca7d64dead6f0e65157013bdfcb46d640832d351a764f2094255a32175","abstract_canon_sha256":"946e2a6c178c07fa4b1366692692fbc4ec7c04a5d10409a5a44d58fafcca9270"},"schema_version":"1.0"},"canonical_sha256":"58b2ee0a6b2f9dc8ce8c1ddec8318ed617407f51b94a8eaae22b6fdd3c23884b","source":{"kind":"arxiv","id":"1308.2036","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1308.2036","created_at":"2026-05-18T01:48:21Z"},{"alias_kind":"arxiv_version","alias_value":"1308.2036v1","created_at":"2026-05-18T01:48:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1308.2036","created_at":"2026-05-18T01:48:21Z"},{"alias_kind":"pith_short_12","alias_value":"LCZO4CTLF6O4","created_at":"2026-05-18T12:27:51Z"},{"alias_kind":"pith_short_16","alias_value":"LCZO4CTLF6O4RTUM","created_at":"2026-05-18T12:27:51Z"},{"alias_kind":"pith_short_8","alias_value":"LCZO4CTL","created_at":"2026-05-18T12:27:51Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:LCZO4CTLF6O4RTUMDXPMQMMO2Y","target":"record","payload":{"canonical_record":{"source":{"id":"1308.2036","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-08-09T06:04:24Z","cross_cats_sorted":[],"title_canon_sha256":"7eae30ca7d64dead6f0e65157013bdfcb46d640832d351a764f2094255a32175","abstract_canon_sha256":"946e2a6c178c07fa4b1366692692fbc4ec7c04a5d10409a5a44d58fafcca9270"},"schema_version":"1.0"},"canonical_sha256":"58b2ee0a6b2f9dc8ce8c1ddec8318ed617407f51b94a8eaae22b6fdd3c23884b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:48:21.886414Z","signature_b64":"M5sDirVyTzT1zMy4Nv46XfFUEA4XEE0+yJ9mdZZ9kZrh1Q6Gu5DZCEbQzfSmBAOrj+LJR2oLWL1s4f70rOL8DA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"58b2ee0a6b2f9dc8ce8c1ddec8318ed617407f51b94a8eaae22b6fdd3c23884b","last_reissued_at":"2026-05-18T01:48:21.885859Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:48:21.885859Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1308.2036","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:48:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lg33bOhsGVTjJarRn5zjKiCWuco6pAA1O0xWxRYTo9smNoGFINe25boenDOXVbGH9TZy6i6l7otn9r4160XyAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T13:16:07.874582Z"},"content_sha256":"1ef842b19201f4f32710c88b7a163fe30d4278cb3ecbfc1de40bc04f9315fecd","schema_version":"1.0","event_id":"sha256:1ef842b19201f4f32710c88b7a163fe30d4278cb3ecbfc1de40bc04f9315fecd"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:LCZO4CTLF6O4RTUMDXPMQMMO2Y","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Performance gain of displacement receiver with optimized prior probability","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"M. Fujiwara, M. Sasaki, M. Takeoka, S. Izumi","submitted_at":"2013-08-09T06:04:24Z","abstract_excerpt":"We numerically study the performance of the displacement based quantum receiver for the discrimination of weak 3- and 4-phase-shift keyed (PSK) coherent state signals. We show that due to the nontrivial asymmetry of the receiver structure, optimization of the prior probability increases the mutual information and achieves sub-shot-noise limit discrimination. Moreover, we estimate the cutoff rate for a 4-PSK signal and confirm that the prior probability optimization shortens the code length for a given decoding error criterion. Such consideration for the asymmetric channel matrix is essential i"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1308.2036","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:48:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"u7paXs3qOjEnljDDtyycuqtjIoN8KCLSodkhGScOilERGzgHYwt0/lHyWG6pP0eJvI5JEl2bLKHsm7bHmqRTDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T13:16:07.875194Z"},"content_sha256":"f11d59d7864776223c796de36874c093b6ee00ab0dce10440f926cb2e77517e3","schema_version":"1.0","event_id":"sha256:f11d59d7864776223c796de36874c093b6ee00ab0dce10440f926cb2e77517e3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LCZO4CTLF6O4RTUMDXPMQMMO2Y/bundle.json","state_url":"https://pith.science/pith/LCZO4CTLF6O4RTUMDXPMQMMO2Y/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LCZO4CTLF6O4RTUMDXPMQMMO2Y/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-30T13:16:07Z","links":{"resolver":"https://pith.science/pith/LCZO4CTLF6O4RTUMDXPMQMMO2Y","bundle":"https://pith.science/pith/LCZO4CTLF6O4RTUMDXPMQMMO2Y/bundle.json","state":"https://pith.science/pith/LCZO4CTLF6O4RTUMDXPMQMMO2Y/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LCZO4CTLF6O4RTUMDXPMQMMO2Y/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:LCZO4CTLF6O4RTUMDXPMQMMO2Y","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":"946e2a6c178c07fa4b1366692692fbc4ec7c04a5d10409a5a44d58fafcca9270","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-08-09T06:04:24Z","title_canon_sha256":"7eae30ca7d64dead6f0e65157013bdfcb46d640832d351a764f2094255a32175"},"schema_version":"1.0","source":{"id":"1308.2036","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1308.2036","created_at":"2026-05-18T01:48:21Z"},{"alias_kind":"arxiv_version","alias_value":"1308.2036v1","created_at":"2026-05-18T01:48:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1308.2036","created_at":"2026-05-18T01:48:21Z"},{"alias_kind":"pith_short_12","alias_value":"LCZO4CTLF6O4","created_at":"2026-05-18T12:27:51Z"},{"alias_kind":"pith_short_16","alias_value":"LCZO4CTLF6O4RTUM","created_at":"2026-05-18T12:27:51Z"},{"alias_kind":"pith_short_8","alias_value":"LCZO4CTL","created_at":"2026-05-18T12:27:51Z"}],"graph_snapshots":[{"event_id":"sha256:f11d59d7864776223c796de36874c093b6ee00ab0dce10440f926cb2e77517e3","target":"graph","created_at":"2026-05-18T01:48:21Z","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":"We numerically study the performance of the displacement based quantum receiver for the discrimination of weak 3- and 4-phase-shift keyed (PSK) coherent state signals. We show that due to the nontrivial asymmetry of the receiver structure, optimization of the prior probability increases the mutual information and achieves sub-shot-noise limit discrimination. Moreover, we estimate the cutoff rate for a 4-PSK signal and confirm that the prior probability optimization shortens the code length for a given decoding error criterion. Such consideration for the asymmetric channel matrix is essential i","authors_text":"M. Fujiwara, M. Sasaki, M. Takeoka, S. Izumi","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-08-09T06:04:24Z","title":"Performance gain of displacement receiver with optimized prior probability"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1308.2036","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":"sha256:1ef842b19201f4f32710c88b7a163fe30d4278cb3ecbfc1de40bc04f9315fecd","target":"record","created_at":"2026-05-18T01:48:21Z","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":"946e2a6c178c07fa4b1366692692fbc4ec7c04a5d10409a5a44d58fafcca9270","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-08-09T06:04:24Z","title_canon_sha256":"7eae30ca7d64dead6f0e65157013bdfcb46d640832d351a764f2094255a32175"},"schema_version":"1.0","source":{"id":"1308.2036","kind":"arxiv","version":1}},"canonical_sha256":"58b2ee0a6b2f9dc8ce8c1ddec8318ed617407f51b94a8eaae22b6fdd3c23884b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"58b2ee0a6b2f9dc8ce8c1ddec8318ed617407f51b94a8eaae22b6fdd3c23884b","first_computed_at":"2026-05-18T01:48:21.885859Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:48:21.885859Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"M5sDirVyTzT1zMy4Nv46XfFUEA4XEE0+yJ9mdZZ9kZrh1Q6Gu5DZCEbQzfSmBAOrj+LJR2oLWL1s4f70rOL8DA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:48:21.886414Z","signed_message":"canonical_sha256_bytes"},"source_id":"1308.2036","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1ef842b19201f4f32710c88b7a163fe30d4278cb3ecbfc1de40bc04f9315fecd","sha256:f11d59d7864776223c796de36874c093b6ee00ab0dce10440f926cb2e77517e3"],"state_sha256":"d596ba81452d7cfe83337dc110cf7d73b84afaaa620096b648e14b01a1c3d3f1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"E87QbbqrAodksF3xBnT/Np/SWfd6Wno+lAXOSW2Ll7u9xUB8XCOzUepeDYtqjDOqZ9hyK2eLWEXn7qF0onEiCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T13:16:07.879839Z","bundle_sha256":"fad42a8a48e9958339ff1c6b6aff7cc33dc91ff06b56561ba0c157830c1c73ea"}}