{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:FN5USF6W3LVJKNCVVKOIQ7II7G","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":"beff189e022e8005a1b0551c6471c2741f3dd6740a95c8cc68b81976de9e4d5a","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-08-08T20:40:47Z","title_canon_sha256":"8f5088c86404d7e35f6ee6ac91a1aaf52e693fb95eea236da8383d935ffb8bf2"},"schema_version":"1.0","source":{"id":"2608.08329","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2608.08329","created_at":"2026-08-11T01:22:20Z"},{"alias_kind":"arxiv_version","alias_value":"2608.08329v1","created_at":"2026-08-11T01:22:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2608.08329","created_at":"2026-08-11T01:22:20Z"},{"alias_kind":"pith_short_12","alias_value":"FN5USF6W3LVJ","created_at":"2026-08-11T01:22:20Z"},{"alias_kind":"pith_short_16","alias_value":"FN5USF6W3LVJKNCV","created_at":"2026-08-11T01:22:20Z"},{"alias_kind":"pith_short_8","alias_value":"FN5USF6W","created_at":"2026-08-11T01:22:20Z"}],"graph_snapshots":[{"event_id":"sha256:ee13d51c2f4e11b999dcb6f662918f7bfb9435f6aceb36f6205ba254af2835fb","target":"graph","created_at":"2026-08-11T01:22:20Z","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/2608.08329/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We investigate the prepare-and-broadcast scenario, a multipartite extension of dimension-constrained prepare-and-measure experiments in which a quantum system is distributed to multiple receivers. We derive fundamental trade-offs between prepare-and-measure witnesses, Bell nonlocality, and quantum random access code performance. We further develop a semi-device-independent randomness certification framework based on prepare-and-broadcast witnesses, showing that the maximal quantum violation certifies two bits of joint randomness, exceeding the limit achievable from the CHSH inequality while re","authors_text":"A. de Oliveira Junior, Diogo H. G. Duarte, Mois\\'es Alves, Rafael Chaves, Santiago Zamora, Tailan S. Sarubi, Vin\\'icius F. Alves","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-08-08T20:40:47Z","title":"Randomness Certification and Trade-offs in the Prepare-and-Broadcast Scenario"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2608.08329","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":"sha256:400c475a8449fda9a8c45b6933b02c5e7a01b28dd212a84669af241d53709a7d","target":"record","created_at":"2026-08-11T01:22:20Z","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":"beff189e022e8005a1b0551c6471c2741f3dd6740a95c8cc68b81976de9e4d5a","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-08-08T20:40:47Z","title_canon_sha256":"8f5088c86404d7e35f6ee6ac91a1aaf52e693fb95eea236da8383d935ffb8bf2"},"schema_version":"1.0","source":{"id":"2608.08329","kind":"arxiv","version":1}},"canonical_sha256":"2b7b4917d6daea953455aa9c887d08f9a7c64e7ee21df58257bc805393ac6bb5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2b7b4917d6daea953455aa9c887d08f9a7c64e7ee21df58257bc805393ac6bb5","first_computed_at":"2026-08-11T01:22:20.493729Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-08-11T01:22:20.493729Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"gnOG5AJQAhVHZvBGJV4edpK+C5NzIXOO2qXgnse8hTFMSC6/3q9+5Iz5lJyxKjxU/Ol77+sNPtKf09Emp5CGCQ==","signature_status":"signed_v1","signed_at":"2026-08-11T01:22:20.496193Z","signed_message":"canonical_sha256_bytes"},"source_id":"2608.08329","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:400c475a8449fda9a8c45b6933b02c5e7a01b28dd212a84669af241d53709a7d","sha256:ee13d51c2f4e11b999dcb6f662918f7bfb9435f6aceb36f6205ba254af2835fb"],"state_sha256":"d6cb4b7cde841e729b65d7ce161877289601ebb388d6f5d6502af350e9334976"}