{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:IMUYMDYVXYESE2UUPVARZFIUM4","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":"f045a5f65a9c098a643a141f360b969193aeb3e2572ca173a5eba4e67799f9d4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-09-30T06:19:01Z","title_canon_sha256":"b9ff28e0155e02c6c02f59f4a6811a2ff0de3abe0e066106dc8e6479984fd2f6"},"schema_version":"1.0","source":{"id":"0909.5519","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0909.5519","created_at":"2026-05-18T02:11:36Z"},{"alias_kind":"arxiv_version","alias_value":"0909.5519v1","created_at":"2026-05-18T02:11:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0909.5519","created_at":"2026-05-18T02:11:36Z"},{"alias_kind":"pith_short_12","alias_value":"IMUYMDYVXYES","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"IMUYMDYVXYESE2UU","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"IMUYMDYV","created_at":"2026-05-18T12:26:00Z"}],"graph_snapshots":[{"event_id":"sha256:5b93afaff59b468b13ac4acb3cafcfb09fd35f720fd8043ff820447e31ce6377","target":"graph","created_at":"2026-05-18T02:11:36Z","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"},"paper":{"abstract_excerpt":"We propose a method to prepare different non-Poissonian signal pulses from sources of Poissonian photon number distribution using only linear optical elements and threshold photon detectors. This method allows a simple passive preparation of decoy states for quantum key distribution. We show that the resulting key rates are comparable to the performance of active choices of intensities of Poissonian signals.","authors_text":"Marcos Curty, Norbert L\\\"utkenhaus, Tobias Moroder, Xiongfeng Ma","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-09-30T06:19:01Z","title":"Non-Poissonian statistics from Poissonian light sources with application to passive decoy state quantum key distribution"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0909.5519","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":"sha256:44d87ab1dc489c8eeb9399fa2db6dc2f767a1b1e0bc904d7f82357608f73de28","target":"record","created_at":"2026-05-18T02:11:36Z","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":"f045a5f65a9c098a643a141f360b969193aeb3e2572ca173a5eba4e67799f9d4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-09-30T06:19:01Z","title_canon_sha256":"b9ff28e0155e02c6c02f59f4a6811a2ff0de3abe0e066106dc8e6479984fd2f6"},"schema_version":"1.0","source":{"id":"0909.5519","kind":"arxiv","version":1}},"canonical_sha256":"4329860f15be09226a947d411c95146701d9405b09ee944cda8ba64fa7c98435","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4329860f15be09226a947d411c95146701d9405b09ee944cda8ba64fa7c98435","first_computed_at":"2026-05-18T02:11:36.136760Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:11:36.136760Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"RE+UkhG1kEBioB0B4XUQsO7OERl6LoaOXhHELfRXx2MGWUr74XW6LYAXbyjfGAW9xW10/Y7gjdG4iyybjjzOAg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:11:36.137671Z","signed_message":"canonical_sha256_bytes"},"source_id":"0909.5519","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:44d87ab1dc489c8eeb9399fa2db6dc2f767a1b1e0bc904d7f82357608f73de28","sha256:5b93afaff59b468b13ac4acb3cafcfb09fd35f720fd8043ff820447e31ce6377"],"state_sha256":"6a56e1481c1e6b1d89b26e9fe8c21b499b08aaeb78643b616923eb09962269d3"}