{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2007:75KAXETDGBECKBHH2BLQD4RKEM","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":"e9d6ceb0ef77d51650dcce26442f9ccddb1beb65352df0d98f811156eb8da8ef","cross_cats_sorted":[],"license":"","primary_cat":"quant-ph","submitted_at":"2007-01-26T16:56:54Z","title_canon_sha256":"14ff6df1a96997fd26cf9eca309e06e33ac718d745260a74b0dff3005ee27aec"},"schema_version":"1.0","source":{"id":"quant-ph/0701191","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"quant-ph/0701191","created_at":"2026-07-05T04:05:26Z"},{"alias_kind":"arxiv_version","alias_value":"quant-ph/0701191v2","created_at":"2026-07-05T04:05:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.quant-ph/0701191","created_at":"2026-07-05T04:05:26Z"},{"alias_kind":"pith_short_12","alias_value":"75KAXETDGBEC","created_at":"2026-07-05T04:05:26Z"},{"alias_kind":"pith_short_16","alias_value":"75KAXETDGBECKBHH","created_at":"2026-07-05T04:05:26Z"},{"alias_kind":"pith_short_8","alias_value":"75KAXETD","created_at":"2026-07-05T04:05:26Z"}],"graph_snapshots":[{"event_id":"sha256:d492a0083b15c3055312a5908075b2c96f9b2f2a7d8bc566603ca0beb2282695","target":"graph","created_at":"2026-07-05T04:05:26Z","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/quant-ph/0701191/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"In Bell experiments, one problem is to achieve high enough photodetection to ensure that there is no possibility of describing the results via a local hidden-variable model. Using the Clauser-Horne inequality and a two-photon non-maximally entangled state, a photodetection efficiency higher than 0.67 is necessary. Here we discuss atom-photon Bell experiments. We show that, assuming perfect detection efficiency of the atom, it is possible to perform a loophole-free atom-photon Bell experiment whenever the photodetection efficiency exceeds 0.50.","authors_text":"Adan Cabello, Jan-{\\AA}ke Larsson","cross_cats":[],"headline":"","license":"","primary_cat":"quant-ph","submitted_at":"2007-01-26T16:56:54Z","title":"Minimum detection efficiency for a loophole-free atom-photon Bell experiment"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"quant-ph/0701191","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:a2ec929ce9f91f31a12c6b314d273ee67afb630c2e75976013de89523e7eec6e","target":"record","created_at":"2026-07-05T04:05:26Z","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":"e9d6ceb0ef77d51650dcce26442f9ccddb1beb65352df0d98f811156eb8da8ef","cross_cats_sorted":[],"license":"","primary_cat":"quant-ph","submitted_at":"2007-01-26T16:56:54Z","title_canon_sha256":"14ff6df1a96997fd26cf9eca309e06e33ac718d745260a74b0dff3005ee27aec"},"schema_version":"1.0","source":{"id":"quant-ph/0701191","kind":"arxiv","version":2}},"canonical_sha256":"ff540b926330482504e7d05701f22a230b7ec5cd89b180647023ba2a27bb5be1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ff540b926330482504e7d05701f22a230b7ec5cd89b180647023ba2a27bb5be1","first_computed_at":"2026-07-05T04:05:26.876658Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:05:26.876658Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"yCpu8N4q9BqXuKWVOaKHBENsSSnRcD3GSF7TpX0zZ5yxCZDZ32qe6zMyI5d8jb4g+Sm2MWuev7FFKkB9GrXnAg==","signature_status":"signed_v1","signed_at":"2026-07-05T04:05:26.877159Z","signed_message":"canonical_sha256_bytes"},"source_id":"quant-ph/0701191","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a2ec929ce9f91f31a12c6b314d273ee67afb630c2e75976013de89523e7eec6e","sha256:d492a0083b15c3055312a5908075b2c96f9b2f2a7d8bc566603ca0beb2282695"],"state_sha256":"2f94ac99ce29974ac231029013950ac7ecfc214792e32e3c732cb1837c37c839"}