{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:LALZZJLJ362RETWJXGWXL6FOFM","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":"fb56993924fa33bce8ef0fbfdf5464fe629e5f5dde449085dfa829be9fe3d149","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2022-01-04T01:58:00Z","title_canon_sha256":"4885706073b5aa296a0cd1d412074fdd4af66cab05a880be6b86efeb706452bc"},"schema_version":"1.0","source":{"id":"2201.00936","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2201.00936","created_at":"2026-07-05T03:53:15Z"},{"alias_kind":"arxiv_version","alias_value":"2201.00936v1","created_at":"2026-07-05T03:53:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2201.00936","created_at":"2026-07-05T03:53:15Z"},{"alias_kind":"pith_short_12","alias_value":"LALZZJLJ362R","created_at":"2026-07-05T03:53:15Z"},{"alias_kind":"pith_short_16","alias_value":"LALZZJLJ362RETWJ","created_at":"2026-07-05T03:53:15Z"},{"alias_kind":"pith_short_8","alias_value":"LALZZJLJ","created_at":"2026-07-05T03:53:15Z"}],"graph_snapshots":[{"event_id":"sha256:e0c33b89b1c7fbb36cbd05499213aeb32403f04c647956f1df0f222985b48ec9","target":"graph","created_at":"2026-07-05T03:53:15Z","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/2201.00936/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Quantum key distribution (QKD) is theoretically secure using the principle of quantum mechanics; therefore, QKD is a promising solution for the future of secure communication. Although several experimental demonstrations of QKD have been reported, they have not considered the polarization-dependent loss in state preparation in the key-rate estimation. In this study, we experimentally characterized polarization-dependent loss in realistic state-preparation devices and verified that a considerable PDL exists in fiber- and silicon-based polarization modulators. Hence, the security of such QKD sys","authors_text":"Chunfeng Huang, Junwei Wang, Kejin Wei, Long Jin, Minming Geng, Ye Chen, Zhenrong Zhang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2022-01-04T01:58:00Z","title":"Experimental secure quantum key distribution in presence of polarization-dependent loss"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2201.00936","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:d88e6147160c9878efe035779e2306caa4f31489688633cbd51142f714af6c56","target":"record","created_at":"2026-07-05T03:53:15Z","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":"fb56993924fa33bce8ef0fbfdf5464fe629e5f5dde449085dfa829be9fe3d149","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2022-01-04T01:58:00Z","title_canon_sha256":"4885706073b5aa296a0cd1d412074fdd4af66cab05a880be6b86efeb706452bc"},"schema_version":"1.0","source":{"id":"2201.00936","kind":"arxiv","version":1}},"canonical_sha256":"58179ca569dfb5124ec9b9ad75f8ae2b125b150357d37189bc49617de0ae3c00","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"58179ca569dfb5124ec9b9ad75f8ae2b125b150357d37189bc49617de0ae3c00","first_computed_at":"2026-07-05T03:53:15.242593Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:53:15.242593Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"BPhDSiQj/e5jClzs6uSYIRBsqwHqpyWYUayL50TkCos1yjgfQLhbVh+yzhuhz8EPN0jlWhrty6vdY7woduIlAA==","signature_status":"signed_v1","signed_at":"2026-07-05T03:53:15.243327Z","signed_message":"canonical_sha256_bytes"},"source_id":"2201.00936","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d88e6147160c9878efe035779e2306caa4f31489688633cbd51142f714af6c56","sha256:e0c33b89b1c7fbb36cbd05499213aeb32403f04c647956f1df0f222985b48ec9"],"state_sha256":"1d625e356f8c00e5351d5c96a49fd4548783d3161667935dcc93c7400b05926a"}