{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2025:2KZV6WRPZ6G2YPQNLBHXWFPO64","short_pith_number":"pith:2KZV6WRP","schema_version":"1.0","canonical_sha256":"d2b35f5a2fcf8dac3e0d584f7b15eef70042590f94e989580dac0a90416dd9e5","source":{"kind":"arxiv","id":"2509.02087","version":1},"attestation_state":"computed","paper":{"title":"Security Analysis of MDI-QKD in Turbulent Free-Space Polarization Channels-A Composite Channel Framework","license":"http://creativecommons.org/publicdomain/zero/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Heyang Peng, Seid Koudia, Symeon Chatzinotas","submitted_at":"2025-09-02T08:34:59Z","abstract_excerpt":"Atmospheric turbulence poses a significant challenge to free-space measurement-device-independent quantum key distribution (FSO MDI-QKD) by inducing polarization decoherence and depolarization, which degrade the secret key rate (SKR). In this paper, we propose a unified depolarizing-dephasing channel model for turbulence-induced polarization decoherence in FSO MDI-QKD. This model consolidates phase perturbations, Gaussian beam spreading, beam drift, aperture truncation, and scintillation into closed-form parameters: depolarization factor, decoherence factor, and detection probability. By mappi"},"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":"2509.02087","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"quant-ph","submitted_at":"2025-09-02T08:34:59Z","cross_cats_sorted":[],"title_canon_sha256":"70f4f1314ec8328e0df603c89daae13b1ad6058212299b235c10cf1da28ee0c2","abstract_canon_sha256":"96744910604fdde8d795a748dd156faf3f7820b32f0e7ed4ceae740f8ce1fe74"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T12:03:14.418940Z","signature_b64":"cI1rEaU3qEoErWZnuqp16uKiANr0gmbH0u9+TARO/AcGGzIE4iKr9vIeWRXD14c6smwzEMm57bMjv/NE7A/xBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d2b35f5a2fcf8dac3e0d584f7b15eef70042590f94e989580dac0a90416dd9e5","last_reissued_at":"2026-07-05T12:03:14.418449Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T12:03:14.418449Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Security Analysis of MDI-QKD in Turbulent Free-Space Polarization Channels-A Composite Channel Framework","license":"http://creativecommons.org/publicdomain/zero/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Heyang Peng, Seid Koudia, Symeon Chatzinotas","submitted_at":"2025-09-02T08:34:59Z","abstract_excerpt":"Atmospheric turbulence poses a significant challenge to free-space measurement-device-independent quantum key distribution (FSO MDI-QKD) by inducing polarization decoherence and depolarization, which degrade the secret key rate (SKR). In this paper, we propose a unified depolarizing-dephasing channel model for turbulence-induced polarization decoherence in FSO MDI-QKD. This model consolidates phase perturbations, Gaussian beam spreading, beam drift, aperture truncation, and scintillation into closed-form parameters: depolarization factor, decoherence factor, and detection probability. By mappi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2509.02087","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/2509.02087/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":"2509.02087","created_at":"2026-07-05T12:03:14.418508+00:00"},{"alias_kind":"arxiv_version","alias_value":"2509.02087v1","created_at":"2026-07-05T12:03:14.418508+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2509.02087","created_at":"2026-07-05T12:03:14.418508+00:00"},{"alias_kind":"pith_short_12","alias_value":"2KZV6WRPZ6G2","created_at":"2026-07-05T12:03:14.418508+00:00"},{"alias_kind":"pith_short_16","alias_value":"2KZV6WRPZ6G2YPQN","created_at":"2026-07-05T12:03:14.418508+00:00"},{"alias_kind":"pith_short_8","alias_value":"2KZV6WRP","created_at":"2026-07-05T12:03:14.418508+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":2,"internal_anchor_count":0,"sample":[{"citing_arxiv_id":"2604.26008","citing_title":"Continuous Noise Model for Quantum Circuits","ref_index":27,"is_internal_anchor":false},{"citing_arxiv_id":"2604.18127","citing_title":"A Slow-Time Receiver Interface for Turbulent Free-Space Quantum Polarization Links","ref_index":1,"is_internal_anchor":false}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/2KZV6WRPZ6G2YPQNLBHXWFPO64","json":"https://pith.science/pith/2KZV6WRPZ6G2YPQNLBHXWFPO64.json","graph_json":"https://pith.science/api/pith-number/2KZV6WRPZ6G2YPQNLBHXWFPO64/graph.json","events_json":"https://pith.science/api/pith-number/2KZV6WRPZ6G2YPQNLBHXWFPO64/events.json","paper":"https://pith.science/paper/2KZV6WRP"},"agent_actions":{"view_html":"https://pith.science/pith/2KZV6WRPZ6G2YPQNLBHXWFPO64","download_json":"https://pith.science/pith/2KZV6WRPZ6G2YPQNLBHXWFPO64.json","view_paper":"https://pith.science/paper/2KZV6WRP","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2509.02087&json=true","fetch_graph":"https://pith.science/api/pith-number/2KZV6WRPZ6G2YPQNLBHXWFPO64/graph.json","fetch_events":"https://pith.science/api/pith-number/2KZV6WRPZ6G2YPQNLBHXWFPO64/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/2KZV6WRPZ6G2YPQNLBHXWFPO64/action/timestamp_anchor","attest_storage":"https://pith.science/pith/2KZV6WRPZ6G2YPQNLBHXWFPO64/action/storage_attestation","attest_author":"https://pith.science/pith/2KZV6WRPZ6G2YPQNLBHXWFPO64/action/author_attestation","sign_citation":"https://pith.science/pith/2KZV6WRPZ6G2YPQNLBHXWFPO64/action/citation_signature","submit_replication":"https://pith.science/pith/2KZV6WRPZ6G2YPQNLBHXWFPO64/action/replication_record"}},"created_at":"2026-07-05T12:03:14.418508+00:00","updated_at":"2026-07-05T12:03:14.418508+00:00"}