{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:5CJOCUY52BENSG6DZ4TDSR3D7P","short_pith_number":"pith:5CJOCUY5","canonical_record":{"source":{"id":"1410.7629","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-10-28T14:23:47Z","cross_cats_sorted":[],"title_canon_sha256":"c07dd04c6a4db87a737b09dbae5ac8157ef263d38b5344741876641ab5a8bc07","abstract_canon_sha256":"77680f9c90d35f80a942dceaf764c7beb8ae1af0c1e3df1b0d53317d171d8201"},"schema_version":"1.0"},"canonical_sha256":"e892e1531dd048d91bc3cf26394763fbe07f194d5b681c19d4b1fdc49b78a96e","source":{"kind":"arxiv","id":"1410.7629","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1410.7629","created_at":"2026-05-18T01:41:39Z"},{"alias_kind":"arxiv_version","alias_value":"1410.7629v1","created_at":"2026-05-18T01:41:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1410.7629","created_at":"2026-05-18T01:41:39Z"},{"alias_kind":"pith_short_12","alias_value":"5CJOCUY52BEN","created_at":"2026-05-18T12:28:14Z"},{"alias_kind":"pith_short_16","alias_value":"5CJOCUY52BENSG6D","created_at":"2026-05-18T12:28:14Z"},{"alias_kind":"pith_short_8","alias_value":"5CJOCUY5","created_at":"2026-05-18T12:28:14Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:5CJOCUY52BENSG6DZ4TDSR3D7P","target":"record","payload":{"canonical_record":{"source":{"id":"1410.7629","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-10-28T14:23:47Z","cross_cats_sorted":[],"title_canon_sha256":"c07dd04c6a4db87a737b09dbae5ac8157ef263d38b5344741876641ab5a8bc07","abstract_canon_sha256":"77680f9c90d35f80a942dceaf764c7beb8ae1af0c1e3df1b0d53317d171d8201"},"schema_version":"1.0"},"canonical_sha256":"e892e1531dd048d91bc3cf26394763fbe07f194d5b681c19d4b1fdc49b78a96e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:41:39.265810Z","signature_b64":"Y9x0Noq7HGwa/QTowdJHG7BNG2Hwptfgyrhn2JxmfaRTQ6jJfIcKPT69M3Sz1s4IZPI4mhVz/t2LbIHgrlp6BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e892e1531dd048d91bc3cf26394763fbe07f194d5b681c19d4b1fdc49b78a96e","last_reissued_at":"2026-05-18T01:41:39.265109Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:41:39.265109Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1410.7629","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:41:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jV6/cgu6xDbEGaw7jorLsQjF3P0m8zWXJtgoLaqhQcQ308UYx8SWC3M6BM4a8JMGlIli3KUJEzuZV71/to7iBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T22:34:23.208430Z"},"content_sha256":"f709459e73146ed6f494b55ecf57975c8cba958df9cd26cce6e57193ac3caec2","schema_version":"1.0","event_id":"sha256:f709459e73146ed6f494b55ecf57975c8cba958df9cd26cce6e57193ac3caec2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:5CJOCUY52BENSG6DZ4TDSR3D7P","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Optimal randomness generation from optical Bell experiments","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Alejandro M\\'attar, Antonio Ac\\'in, Daniel Cavalcanti, Jonatan Bohr Brask, Paul Skrzypczyk","submitted_at":"2014-10-28T14:23:47Z","abstract_excerpt":"Genuine randomness can be certified from Bell tests without any detailed assumptions on the working of the devices with which the test is implemented. An important class of experiments for implementing such tests is optical setups based on polarisation measurements of entangled photons distributed from a spontaneous parametric down conversion source. Here we compute the maximal amount of randomness which can be certified in such setups under realistic conditions. We provide relevant yet unexpected numerical values for the physical parameters and achieve four times more randomness than previous"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1410.7629","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":""},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:41:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"x4aF8dvsEK8jpgwMGMxbNiwLsv2xhXJt1zNLTsYwQpraNT9EBRZ0Cc5SQuAUvD59RJZSHuzLqs3/oJGgnG6BAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T22:34:23.209150Z"},"content_sha256":"cd2293114b963bb72e7f6d1fce878b5fcdc1dc7569c92074ee96e58b284d7f00","schema_version":"1.0","event_id":"sha256:cd2293114b963bb72e7f6d1fce878b5fcdc1dc7569c92074ee96e58b284d7f00"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5CJOCUY52BENSG6DZ4TDSR3D7P/bundle.json","state_url":"https://pith.science/pith/5CJOCUY52BENSG6DZ4TDSR3D7P/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5CJOCUY52BENSG6DZ4TDSR3D7P/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-30T22:34:23Z","links":{"resolver":"https://pith.science/pith/5CJOCUY52BENSG6DZ4TDSR3D7P","bundle":"https://pith.science/pith/5CJOCUY52BENSG6DZ4TDSR3D7P/bundle.json","state":"https://pith.science/pith/5CJOCUY52BENSG6DZ4TDSR3D7P/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5CJOCUY52BENSG6DZ4TDSR3D7P/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:5CJOCUY52BENSG6DZ4TDSR3D7P","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":"77680f9c90d35f80a942dceaf764c7beb8ae1af0c1e3df1b0d53317d171d8201","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-10-28T14:23:47Z","title_canon_sha256":"c07dd04c6a4db87a737b09dbae5ac8157ef263d38b5344741876641ab5a8bc07"},"schema_version":"1.0","source":{"id":"1410.7629","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1410.7629","created_at":"2026-05-18T01:41:39Z"},{"alias_kind":"arxiv_version","alias_value":"1410.7629v1","created_at":"2026-05-18T01:41:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1410.7629","created_at":"2026-05-18T01:41:39Z"},{"alias_kind":"pith_short_12","alias_value":"5CJOCUY52BEN","created_at":"2026-05-18T12:28:14Z"},{"alias_kind":"pith_short_16","alias_value":"5CJOCUY52BENSG6D","created_at":"2026-05-18T12:28:14Z"},{"alias_kind":"pith_short_8","alias_value":"5CJOCUY5","created_at":"2026-05-18T12:28:14Z"}],"graph_snapshots":[{"event_id":"sha256:cd2293114b963bb72e7f6d1fce878b5fcdc1dc7569c92074ee96e58b284d7f00","target":"graph","created_at":"2026-05-18T01:41:39Z","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":"Genuine randomness can be certified from Bell tests without any detailed assumptions on the working of the devices with which the test is implemented. An important class of experiments for implementing such tests is optical setups based on polarisation measurements of entangled photons distributed from a spontaneous parametric down conversion source. Here we compute the maximal amount of randomness which can be certified in such setups under realistic conditions. We provide relevant yet unexpected numerical values for the physical parameters and achieve four times more randomness than previous","authors_text":"Alejandro M\\'attar, Antonio Ac\\'in, Daniel Cavalcanti, Jonatan Bohr Brask, Paul Skrzypczyk","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-10-28T14:23:47Z","title":"Optimal randomness generation from optical Bell experiments"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1410.7629","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:f709459e73146ed6f494b55ecf57975c8cba958df9cd26cce6e57193ac3caec2","target":"record","created_at":"2026-05-18T01:41:39Z","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":"77680f9c90d35f80a942dceaf764c7beb8ae1af0c1e3df1b0d53317d171d8201","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-10-28T14:23:47Z","title_canon_sha256":"c07dd04c6a4db87a737b09dbae5ac8157ef263d38b5344741876641ab5a8bc07"},"schema_version":"1.0","source":{"id":"1410.7629","kind":"arxiv","version":1}},"canonical_sha256":"e892e1531dd048d91bc3cf26394763fbe07f194d5b681c19d4b1fdc49b78a96e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e892e1531dd048d91bc3cf26394763fbe07f194d5b681c19d4b1fdc49b78a96e","first_computed_at":"2026-05-18T01:41:39.265109Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:41:39.265109Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Y9x0Noq7HGwa/QTowdJHG7BNG2Hwptfgyrhn2JxmfaRTQ6jJfIcKPT69M3Sz1s4IZPI4mhVz/t2LbIHgrlp6BA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:41:39.265810Z","signed_message":"canonical_sha256_bytes"},"source_id":"1410.7629","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f709459e73146ed6f494b55ecf57975c8cba958df9cd26cce6e57193ac3caec2","sha256:cd2293114b963bb72e7f6d1fce878b5fcdc1dc7569c92074ee96e58b284d7f00"],"state_sha256":"2fcb74ed052bb676b86af4313f598967bb0a85ef5c8787d851214d576a814848"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hpGOToWldY6ZexMcZA+8sn9ztZQCDX18cjNWJ/uxUgjUmpIC3lLHUFX33EP8+1gZS0D7Q9roBMdKQqd0VFJOAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T22:34:23.213351Z","bundle_sha256":"8f997ba17926676f8024145383de8883600589a1edd9fcd1a42894b0b7f56425"}}