{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:T5GCKST2B73ZST6B6PLPVFCCYO","short_pith_number":"pith:T5GCKST2","canonical_record":{"source":{"id":"1409.8051","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-09-29T09:52:38Z","cross_cats_sorted":[],"title_canon_sha256":"3d561650cbe10de70fb2b7308504018e71017e405ac6830741036cf958a348ff","abstract_canon_sha256":"61005051143b911f8fafb6fc7328967b395ed9d6c7bfcf2128e43d450b749320"},"schema_version":"1.0"},"canonical_sha256":"9f4c254a7a0ff7994fc1f3d6fa9442c3b9d7348e3484774fac55bbe814665ec5","source":{"kind":"arxiv","id":"1409.8051","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1409.8051","created_at":"2026-05-18T02:26:10Z"},{"alias_kind":"arxiv_version","alias_value":"1409.8051v2","created_at":"2026-05-18T02:26:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1409.8051","created_at":"2026-05-18T02:26:10Z"},{"alias_kind":"pith_short_12","alias_value":"T5GCKST2B73Z","created_at":"2026-05-18T12:28:49Z"},{"alias_kind":"pith_short_16","alias_value":"T5GCKST2B73ZST6B","created_at":"2026-05-18T12:28:49Z"},{"alias_kind":"pith_short_8","alias_value":"T5GCKST2","created_at":"2026-05-18T12:28:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:T5GCKST2B73ZST6B6PLPVFCCYO","target":"record","payload":{"canonical_record":{"source":{"id":"1409.8051","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-09-29T09:52:38Z","cross_cats_sorted":[],"title_canon_sha256":"3d561650cbe10de70fb2b7308504018e71017e405ac6830741036cf958a348ff","abstract_canon_sha256":"61005051143b911f8fafb6fc7328967b395ed9d6c7bfcf2128e43d450b749320"},"schema_version":"1.0"},"canonical_sha256":"9f4c254a7a0ff7994fc1f3d6fa9442c3b9d7348e3484774fac55bbe814665ec5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:26:10.460489Z","signature_b64":"r3ODvlZOxk8nfJUMCV01SejUNqJyC+RBrDFejlXHjp5KNNQ9UpUe5hFVy5uiDRqqTvAt/vSUgLsqvVfD5+IOAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9f4c254a7a0ff7994fc1f3d6fa9442c3b9d7348e3484774fac55bbe814665ec5","last_reissued_at":"2026-05-18T02:26:10.459807Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:26:10.459807Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1409.8051","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:26:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Y1WBD8rUWdCaXVZREr1D4yzHxnRXM81Mr/ATyODrnkoziXOTsGEYVS7Esmt6ksXmoUnMyHKxYNJdL9VbTby9Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T05:29:33.946597Z"},"content_sha256":"f9972108a281259ee7ec542d7c44763387783a2b286b421450841bfa79deeb7f","schema_version":"1.0","event_id":"sha256:f9972108a281259ee7ec542d7c44763387783a2b286b421450841bfa79deeb7f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:T5GCKST2B73ZST6B6PLPVFCCYO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Comparing different approaches for generating random numbers device-independently using a photon pair source","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"A. Martin, C.C.W. Lim, H. Zbinden, J.-D. Bancal, N. Gisin, N. Sangouard, P. Sekatski, R.T. Thew, V. Caprara Vivoli","submitted_at":"2014-09-29T09:52:38Z","abstract_excerpt":"What is the most efficient way to generate random numbers device-independently using a photon pair source based on spontaneous parametric down conversion (SPDC)? We consider this question by comparing two implementations of a detection-loophole-free Bell test. In particular, we study in detail a scenario where a heralded single photon source (HSPS) is used to herald path-entangled states, i.e. entanglement between two spatial modes sharing a single photon and where non-locality is revealed using photon counting preceded by small displacement operations. We start by giving a theoretical descrip"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1409.8051","kind":"arxiv","version":2},"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":"2026-05-18T02:26:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IPnwOt+gglkfMAhmWAY4WxeP2c7gQa515xv+8DnHcH4iwWK65zNTLG77qv0hEmLL7eXo/35D0LJuEcQFFZ1QAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T05:29:33.947282Z"},"content_sha256":"bd98be06df7285521ef8f882ab24a87b7dc336d24280489e7fcd1471ac50e459","schema_version":"1.0","event_id":"sha256:bd98be06df7285521ef8f882ab24a87b7dc336d24280489e7fcd1471ac50e459"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/T5GCKST2B73ZST6B6PLPVFCCYO/bundle.json","state_url":"https://pith.science/pith/T5GCKST2B73ZST6B6PLPVFCCYO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/T5GCKST2B73ZST6B6PLPVFCCYO/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":"2026-05-20T05:29:33Z","links":{"resolver":"https://pith.science/pith/T5GCKST2B73ZST6B6PLPVFCCYO","bundle":"https://pith.science/pith/T5GCKST2B73ZST6B6PLPVFCCYO/bundle.json","state":"https://pith.science/pith/T5GCKST2B73ZST6B6PLPVFCCYO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/T5GCKST2B73ZST6B6PLPVFCCYO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:T5GCKST2B73ZST6B6PLPVFCCYO","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":"61005051143b911f8fafb6fc7328967b395ed9d6c7bfcf2128e43d450b749320","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-09-29T09:52:38Z","title_canon_sha256":"3d561650cbe10de70fb2b7308504018e71017e405ac6830741036cf958a348ff"},"schema_version":"1.0","source":{"id":"1409.8051","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1409.8051","created_at":"2026-05-18T02:26:10Z"},{"alias_kind":"arxiv_version","alias_value":"1409.8051v2","created_at":"2026-05-18T02:26:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1409.8051","created_at":"2026-05-18T02:26:10Z"},{"alias_kind":"pith_short_12","alias_value":"T5GCKST2B73Z","created_at":"2026-05-18T12:28:49Z"},{"alias_kind":"pith_short_16","alias_value":"T5GCKST2B73ZST6B","created_at":"2026-05-18T12:28:49Z"},{"alias_kind":"pith_short_8","alias_value":"T5GCKST2","created_at":"2026-05-18T12:28:49Z"}],"graph_snapshots":[{"event_id":"sha256:bd98be06df7285521ef8f882ab24a87b7dc336d24280489e7fcd1471ac50e459","target":"graph","created_at":"2026-05-18T02:26:10Z","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":"What is the most efficient way to generate random numbers device-independently using a photon pair source based on spontaneous parametric down conversion (SPDC)? We consider this question by comparing two implementations of a detection-loophole-free Bell test. In particular, we study in detail a scenario where a heralded single photon source (HSPS) is used to herald path-entangled states, i.e. entanglement between two spatial modes sharing a single photon and where non-locality is revealed using photon counting preceded by small displacement operations. We start by giving a theoretical descrip","authors_text":"A. Martin, C.C.W. Lim, H. Zbinden, J.-D. Bancal, N. Gisin, N. Sangouard, P. Sekatski, R.T. Thew, V. Caprara Vivoli","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-09-29T09:52:38Z","title":"Comparing different approaches for generating random numbers device-independently using a photon pair source"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1409.8051","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:f9972108a281259ee7ec542d7c44763387783a2b286b421450841bfa79deeb7f","target":"record","created_at":"2026-05-18T02:26:10Z","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":"61005051143b911f8fafb6fc7328967b395ed9d6c7bfcf2128e43d450b749320","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-09-29T09:52:38Z","title_canon_sha256":"3d561650cbe10de70fb2b7308504018e71017e405ac6830741036cf958a348ff"},"schema_version":"1.0","source":{"id":"1409.8051","kind":"arxiv","version":2}},"canonical_sha256":"9f4c254a7a0ff7994fc1f3d6fa9442c3b9d7348e3484774fac55bbe814665ec5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9f4c254a7a0ff7994fc1f3d6fa9442c3b9d7348e3484774fac55bbe814665ec5","first_computed_at":"2026-05-18T02:26:10.459807Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:26:10.459807Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"r3ODvlZOxk8nfJUMCV01SejUNqJyC+RBrDFejlXHjp5KNNQ9UpUe5hFVy5uiDRqqTvAt/vSUgLsqvVfD5+IOAA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:26:10.460489Z","signed_message":"canonical_sha256_bytes"},"source_id":"1409.8051","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f9972108a281259ee7ec542d7c44763387783a2b286b421450841bfa79deeb7f","sha256:bd98be06df7285521ef8f882ab24a87b7dc336d24280489e7fcd1471ac50e459"],"state_sha256":"9b289562ec9ab8f7d1b96fae572bfec8e328286316dcfc40d950ebfeb2e4eb7f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"We0gH/WulcTJObh8hzXyUmWD2dsuM9El6ljYf0cxjWYuJHd4rPcOcajG4uoJscA2CjNPAlfk2PgvggVFFPeHDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-20T05:29:33.950930Z","bundle_sha256":"329f48db4b5f86f11d97de20939ba4965a3027d53bb56bb0a9a966c6ad130822"}}