{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:ZOEVUSRDSBZSIKJ5PFMIPVT3Y3","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":"62bd54cd60c8fe109874fc3f4118835bebb785bc2e0e719938ef848ba1006213","cross_cats_sorted":["cs.CR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2025-12-12T05:19:51Z","title_canon_sha256":"62c5e2fb261edb40d5509dbe32d4a179d21d467d23f9db3f9728093345678e22"},"schema_version":"1.0","source":{"id":"2512.11286","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2512.11286","created_at":"2026-05-29T01:04:59Z"},{"alias_kind":"arxiv_version","alias_value":"2512.11286v2","created_at":"2026-05-29T01:04:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2512.11286","created_at":"2026-05-29T01:04:59Z"},{"alias_kind":"pith_short_12","alias_value":"ZOEVUSRDSBZS","created_at":"2026-05-29T01:04:59Z"},{"alias_kind":"pith_short_16","alias_value":"ZOEVUSRDSBZSIKJ5","created_at":"2026-05-29T01:04:59Z"},{"alias_kind":"pith_short_8","alias_value":"ZOEVUSRD","created_at":"2026-05-29T01:04:59Z"}],"graph_snapshots":[{"event_id":"sha256:ecbb22b724404c821d4b8b30dabe30c7e4d45669cf893de7a2b1460ed897d340","target":"graph","created_at":"2026-05-29T01:04:59Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2512.11286/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"High-dimensional quantum key distribution (HD-QKD) enhances information efficiency and noise tolerance by encoding data in large Hilbert spaces. The orbital angular momentum (OAM) of light provides a scalable basis for such encoding and supports high-dimensional photonic communication. Practical OAM-based implementations remain constrained by challenges in state generation, transmission, and detection. This survey offers a consolidated overview of OAM-encoded HD-QKD, outlining fundamental principles, representative experiments, and system-level limitations. Recent progress in hybrid encodings,","authors_text":"Huan Zhang, Hu Jin, Yu Sun, Zhenyu Cao","cross_cats":["cs.CR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2025-12-12T05:19:51Z","title":"A Survey of OAM-Encoded High-Dimensional Quantum Key Distribution: Foundations, Experiments, and Recent Trends"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2512.11286","kind":"arxiv","version":2},"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":"sha256:3cf550fe90563791c8ae322cb5e3360f874e117afc702c815034fd6b79fa9fbb","target":"record","created_at":"2026-05-29T01:04:59Z","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":"62bd54cd60c8fe109874fc3f4118835bebb785bc2e0e719938ef848ba1006213","cross_cats_sorted":["cs.CR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2025-12-12T05:19:51Z","title_canon_sha256":"62c5e2fb261edb40d5509dbe32d4a179d21d467d23f9db3f9728093345678e22"},"schema_version":"1.0","source":{"id":"2512.11286","kind":"arxiv","version":2}},"canonical_sha256":"cb895a4a23907324293d795887d67bc6c05b38eaf698a61df9e70d75c16b12e2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cb895a4a23907324293d795887d67bc6c05b38eaf698a61df9e70d75c16b12e2","first_computed_at":"2026-05-29T01:04:59.810895Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-29T01:04:59.810895Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"tqRQPrO8AZ5WJqttQCifWdkZI39v7M4j93kPPi4lmdXnvMcpN5o7Jp1M+14VwTGelY9d9GKE3q7bxRrG69pYCg==","signature_status":"signed_v1","signed_at":"2026-05-29T01:04:59.811649Z","signed_message":"canonical_sha256_bytes"},"source_id":"2512.11286","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3cf550fe90563791c8ae322cb5e3360f874e117afc702c815034fd6b79fa9fbb","sha256:ecbb22b724404c821d4b8b30dabe30c7e4d45669cf893de7a2b1460ed897d340"],"state_sha256":"ceeda64fe5ec6fd432b241d10983d9aff466ac150fa5f8ba8e725737d874b64e"}