{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:FJRGIGPQNIVC4O2O2M3Z64KGK5","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":"f3c114eddd7dfdd79d2799d93d7f1270e695d02e8ae8314d24e1628971c65fc5","cross_cats_sorted":["cs.IT","math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-02-09T20:33:33Z","title_canon_sha256":"633d61b52034318681bc9d1265e3de30befa7fb2bf38e3bb8b7b64fb8c9fc184"},"schema_version":"1.0","source":{"id":"1102.1963","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1102.1963","created_at":"2026-05-18T00:57:57Z"},{"alias_kind":"arxiv_version","alias_value":"1102.1963v1","created_at":"2026-05-18T00:57:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1102.1963","created_at":"2026-05-18T00:57:57Z"},{"alias_kind":"pith_short_12","alias_value":"FJRGIGPQNIVC","created_at":"2026-05-18T12:26:28Z"},{"alias_kind":"pith_short_16","alias_value":"FJRGIGPQNIVC4O2O","created_at":"2026-05-18T12:26:28Z"},{"alias_kind":"pith_short_8","alias_value":"FJRGIGPQ","created_at":"2026-05-18T12:26:28Z"}],"graph_snapshots":[{"event_id":"sha256:6d8c11cf97160fa3a296374d6efc01116df5176f8ed4e16c0ec018eef21620b0","target":"graph","created_at":"2026-05-18T00:57:57Z","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":"When classical information is sent over a channel with quantum-state modulation alphabet, such as the free-space optical (FSO) channel, attaining the ultimate (Holevo) limit to channel capacity requires the receiver to make joint measurements over long codeword blocks. In recent work, we showed a receiver for a pure-state channel that can attain the ultimate capacity by applying a single-shot optical (unitary) transformation on the received codeword state followed by simultaneous (but separable) projective measurements on the single-modulation-symbol state spaces. In this paper, we study the u","authors_text":"Jeffrey H. Shapiro, Saikat Guha, Zachary Dutton","cross_cats":["cs.IT","math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-02-09T20:33:33Z","title":"On quantum limit of optical communications: concatenated codes and joint-detection receivers"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1102.1963","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:dd7f14ce506d1b5507fccff76e7094356fe84dafebde71121df9ae7a6778d0f1","target":"record","created_at":"2026-05-18T00:57:57Z","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":"f3c114eddd7dfdd79d2799d93d7f1270e695d02e8ae8314d24e1628971c65fc5","cross_cats_sorted":["cs.IT","math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-02-09T20:33:33Z","title_canon_sha256":"633d61b52034318681bc9d1265e3de30befa7fb2bf38e3bb8b7b64fb8c9fc184"},"schema_version":"1.0","source":{"id":"1102.1963","kind":"arxiv","version":1}},"canonical_sha256":"2a626419f06a2a2e3b4ed3379f7146575e25d4af8f7efac586b8bcb06268dcdb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2a626419f06a2a2e3b4ed3379f7146575e25d4af8f7efac586b8bcb06268dcdb","first_computed_at":"2026-05-18T00:57:57.472527Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:57:57.472527Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"D+cdAsDuDA7yohe80DZqKwxGmdb9tHjlOgouN5Zoo8o1+f9mnh2Ch2iCZ6ZndaH5cFSwTaMWrAzmbieg2DMQDA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:57:57.472918Z","signed_message":"canonical_sha256_bytes"},"source_id":"1102.1963","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dd7f14ce506d1b5507fccff76e7094356fe84dafebde71121df9ae7a6778d0f1","sha256:6d8c11cf97160fa3a296374d6efc01116df5176f8ed4e16c0ec018eef21620b0"],"state_sha256":"cb601526c8553ad158bf675f52179ed45fa5f8d97a8b1674d0db741463ff91fd"}