{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2012:VQFUWZ3QLUIC3RX3VMRXFR3E2Q","short_pith_number":"pith:VQFUWZ3Q","schema_version":"1.0","canonical_sha256":"ac0b4b67705d102dc6fbab2372c764d432ed0baff93a1b3ed39f65c5ac705b13","source":{"kind":"arxiv","id":"1208.1815","version":1},"attestation_state":"computed","paper":{"title":"Displacement receiver for phase-shift-keyed coherent states","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Antonio Assalini, Kazuhiro Ema, Masahide Sasaki, Masahiro Takeoka, Mikio Fujiwara, Nicola Dalla Pozza, Shuro Izumi","submitted_at":"2012-08-09T05:18:32Z","abstract_excerpt":"Quantum receiver is an important tool for overcoming the standard quantum limit (SQL) of discrimination errors in optical communication. We theoretically study the quantum receivers for discriminating ternary and quaternary phase shift keyed coherent states in terms of average error rate and mutual information. Our receiver consists of on/off-type photon detectors and displacement operations w/o electrical feedforward operations. We show that for the ternary signals, the receiver shows a reasonable gain from the SQL even without feedforward. This scheme is realizable with the currently availab"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1208.1815","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-08-09T05:18:32Z","cross_cats_sorted":[],"title_canon_sha256":"61751f1d45092408c41cdb534f62f31f67f4309c27e261a066f6fd3081f8e90d","abstract_canon_sha256":"17974d2d24219d0bd83d7951db640164d0e72cc699ccccbfb67e01a29b3a20e6"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:39:43.375361Z","signature_b64":"I65J3pYZQSv4uGZu0+B5eGa3AjjyE1UNJKXdbYBZCIL83enuhYCwxcmiuyDKLkP1jv0l/lXt6ZE9t0j+WburCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ac0b4b67705d102dc6fbab2372c764d432ed0baff93a1b3ed39f65c5ac705b13","last_reissued_at":"2026-05-18T03:39:43.374857Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:39:43.374857Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Displacement receiver for phase-shift-keyed coherent states","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Antonio Assalini, Kazuhiro Ema, Masahide Sasaki, Masahiro Takeoka, Mikio Fujiwara, Nicola Dalla Pozza, Shuro Izumi","submitted_at":"2012-08-09T05:18:32Z","abstract_excerpt":"Quantum receiver is an important tool for overcoming the standard quantum limit (SQL) of discrimination errors in optical communication. We theoretically study the quantum receivers for discriminating ternary and quaternary phase shift keyed coherent states in terms of average error rate and mutual information. Our receiver consists of on/off-type photon detectors and displacement operations w/o electrical feedforward operations. We show that for the ternary signals, the receiver shows a reasonable gain from the SQL even without feedforward. This scheme is realizable with the currently availab"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1208.1815","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1208.1815","created_at":"2026-05-18T03:39:43.374932+00:00"},{"alias_kind":"arxiv_version","alias_value":"1208.1815v1","created_at":"2026-05-18T03:39:43.374932+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1208.1815","created_at":"2026-05-18T03:39:43.374932+00:00"},{"alias_kind":"pith_short_12","alias_value":"VQFUWZ3QLUIC","created_at":"2026-05-18T12:27:25.539911+00:00"},{"alias_kind":"pith_short_16","alias_value":"VQFUWZ3QLUIC3RX3","created_at":"2026-05-18T12:27:25.539911+00:00"},{"alias_kind":"pith_short_8","alias_value":"VQFUWZ3Q","created_at":"2026-05-18T12:27:25.539911+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/VQFUWZ3QLUIC3RX3VMRXFR3E2Q","json":"https://pith.science/pith/VQFUWZ3QLUIC3RX3VMRXFR3E2Q.json","graph_json":"https://pith.science/api/pith-number/VQFUWZ3QLUIC3RX3VMRXFR3E2Q/graph.json","events_json":"https://pith.science/api/pith-number/VQFUWZ3QLUIC3RX3VMRXFR3E2Q/events.json","paper":"https://pith.science/paper/VQFUWZ3Q"},"agent_actions":{"view_html":"https://pith.science/pith/VQFUWZ3QLUIC3RX3VMRXFR3E2Q","download_json":"https://pith.science/pith/VQFUWZ3QLUIC3RX3VMRXFR3E2Q.json","view_paper":"https://pith.science/paper/VQFUWZ3Q","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1208.1815&json=true","fetch_graph":"https://pith.science/api/pith-number/VQFUWZ3QLUIC3RX3VMRXFR3E2Q/graph.json","fetch_events":"https://pith.science/api/pith-number/VQFUWZ3QLUIC3RX3VMRXFR3E2Q/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/VQFUWZ3QLUIC3RX3VMRXFR3E2Q/action/timestamp_anchor","attest_storage":"https://pith.science/pith/VQFUWZ3QLUIC3RX3VMRXFR3E2Q/action/storage_attestation","attest_author":"https://pith.science/pith/VQFUWZ3QLUIC3RX3VMRXFR3E2Q/action/author_attestation","sign_citation":"https://pith.science/pith/VQFUWZ3QLUIC3RX3VMRXFR3E2Q/action/citation_signature","submit_replication":"https://pith.science/pith/VQFUWZ3QLUIC3RX3VMRXFR3E2Q/action/replication_record"}},"created_at":"2026-05-18T03:39:43.374932+00:00","updated_at":"2026-05-18T03:39:43.374932+00:00"}