{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2026:B2TLHQVHNNYZA45FFQK6EPACQ5","short_pith_number":"pith:B2TLHQVH","schema_version":"1.0","canonical_sha256":"0ea6b3c2a76b719073a52c15e23c02875910dab1446a6317f21f993cd830bcef","source":{"kind":"arxiv","id":"2608.01723","version":1},"attestation_state":"computed","paper":{"title":"Ring Optimized M-APSK Modulation for Discrete Modulated CV-QKD","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Jun Heo, Seonguk Kim","submitted_at":"2026-08-03T05:42:32Z","abstract_excerpt":"This paper proposes a multi ring M-APSK constellation optimization method for discrete-modulated continuous variable quantum key distribution. Unlike conventional APSK structures with fixed ring spacing and predefined ring probabilities, the proposed method optimizes the ring radius ratio and ring probability to improve the finite-size secret key rate. A method based on the Gram matrix is used to calculate the nonzero spectrum of the average state $\\tau$, and fidelity is used to compare the optimized discrete average state with the Gaussian average state. The results show that the proposed str"},"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":"2608.01723","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2026-08-03T05:42:32Z","cross_cats_sorted":[],"title_canon_sha256":"ceb3fafd8e3f699a140ba7f2839c96dbb3679b8fd4f9526b7e377ab924d81219","abstract_canon_sha256":"8c40a5ff28786d758ff082061ef9f25fffc2d84bfc2c7db3dd30636ee5ac95e9"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-08-04T02:06:37.566181Z","signature_b64":"umYc3MWtnc1mp+Sz9X591zFwsygFrStQMhmtujJMsPrvPrJ1V6NwNYRj1HSR7V4rLXZMIEF1GZZTYdYUUup+Cw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0ea6b3c2a76b719073a52c15e23c02875910dab1446a6317f21f993cd830bcef","last_reissued_at":"2026-08-04T02:06:37.564555Z","signature_status":"signed_v1","first_computed_at":"2026-08-04T02:06:37.564555Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Ring Optimized M-APSK Modulation for Discrete Modulated CV-QKD","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Jun Heo, Seonguk Kim","submitted_at":"2026-08-03T05:42:32Z","abstract_excerpt":"This paper proposes a multi ring M-APSK constellation optimization method for discrete-modulated continuous variable quantum key distribution. Unlike conventional APSK structures with fixed ring spacing and predefined ring probabilities, the proposed method optimizes the ring radius ratio and ring probability to improve the finite-size secret key rate. A method based on the Gram matrix is used to calculate the nonzero spectrum of the average state $\\tau$, and fidelity is used to compare the optimized discrete average state with the Gaussian average state. The results show that the proposed str"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2608.01723","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2608.01723/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2608.01723","created_at":"2026-08-04T02:06:37.566054+00:00"},{"alias_kind":"arxiv_version","alias_value":"2608.01723v1","created_at":"2026-08-04T02:06:37.566054+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2608.01723","created_at":"2026-08-04T02:06:37.566054+00:00"},{"alias_kind":"pith_short_12","alias_value":"B2TLHQVHNNYZ","created_at":"2026-08-04T02:06:37.566054+00:00"},{"alias_kind":"pith_short_16","alias_value":"B2TLHQVHNNYZA45F","created_at":"2026-08-04T02:06:37.566054+00:00"},{"alias_kind":"pith_short_8","alias_value":"B2TLHQVH","created_at":"2026-08-04T02:06:37.566054+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/B2TLHQVHNNYZA45FFQK6EPACQ5","json":"https://pith.science/pith/B2TLHQVHNNYZA45FFQK6EPACQ5.json","graph_json":"https://pith.science/api/pith-number/B2TLHQVHNNYZA45FFQK6EPACQ5/graph.json","events_json":"https://pith.science/api/pith-number/B2TLHQVHNNYZA45FFQK6EPACQ5/events.json","paper":"https://pith.science/paper/B2TLHQVH"},"agent_actions":{"view_html":"https://pith.science/pith/B2TLHQVHNNYZA45FFQK6EPACQ5","download_json":"https://pith.science/pith/B2TLHQVHNNYZA45FFQK6EPACQ5.json","view_paper":"https://pith.science/paper/B2TLHQVH","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2608.01723&json=true","fetch_graph":"https://pith.science/api/pith-number/B2TLHQVHNNYZA45FFQK6EPACQ5/graph.json","fetch_events":"https://pith.science/api/pith-number/B2TLHQVHNNYZA45FFQK6EPACQ5/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/B2TLHQVHNNYZA45FFQK6EPACQ5/action/timestamp_anchor","attest_storage":"https://pith.science/pith/B2TLHQVHNNYZA45FFQK6EPACQ5/action/storage_attestation","attest_author":"https://pith.science/pith/B2TLHQVHNNYZA45FFQK6EPACQ5/action/author_attestation","sign_citation":"https://pith.science/pith/B2TLHQVHNNYZA45FFQK6EPACQ5/action/citation_signature","submit_replication":"https://pith.science/pith/B2TLHQVHNNYZA45FFQK6EPACQ5/action/replication_record"}},"created_at":"2026-08-04T02:06:37.566054+00:00","updated_at":"2026-08-04T02:06:37.566054+00:00"}