{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2011:JWNSWAE4S5JDNAMUW43BZ7ZS53","short_pith_number":"pith:JWNSWAE4","schema_version":"1.0","canonical_sha256":"4d9b2b009c9752368194b7361cff32eedce36aa9806b5271f1ab29b36559f64d","source":{"kind":"arxiv","id":"1108.1027","version":1},"attestation_state":"computed","paper":{"title":"Loophole-free Bell test for one atom and less than one photon","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"H. Weinfurter, J.-D. Bancal, M. Weber, N. Gisin, N. Sangouard, P. Sekatski, W. Rosenfeld","submitted_at":"2011-08-04T09:25:12Z","abstract_excerpt":"We consider the entanglement between two internal states of a single atom and two photon number states describing either the vaccum or a single photon and thus containing, on average, less than one photon. We show that this intriguing entanglement can be characterized through substantial violations of a Bell inequality by performing homodyne detections on the optical mode. We present the experimental challenges that need to be overcome to pave the way towards a loophole-free Bell test in this setup."},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1108.1027","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-08-04T09:25:12Z","cross_cats_sorted":[],"title_canon_sha256":"a00bc22113525eba24e9ea5764e55d36543a26ed99184ffdea5de43648b61b71","abstract_canon_sha256":"4e994656fd86f069dd612c51ea193e2634b58fc1a22471da2e7637a58bebf62d"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:01:03.039635Z","signature_b64":"3TLDa/qMxCRrHvrnxFo6J2Qj8zH/CiT2Lgg64BjtawhPGaHctU9T+qf8YC90+b4vfce8w770LMoSwx61IH+tBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4d9b2b009c9752368194b7361cff32eedce36aa9806b5271f1ab29b36559f64d","last_reissued_at":"2026-05-18T02:01:03.038923Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:01:03.038923Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Loophole-free Bell test for one atom and less than one photon","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"H. Weinfurter, J.-D. Bancal, M. Weber, N. Gisin, N. Sangouard, P. Sekatski, W. Rosenfeld","submitted_at":"2011-08-04T09:25:12Z","abstract_excerpt":"We consider the entanglement between two internal states of a single atom and two photon number states describing either the vaccum or a single photon and thus containing, on average, less than one photon. We show that this intriguing entanglement can be characterized through substantial violations of a Bell inequality by performing homodyne detections on the optical mode. We present the experimental challenges that need to be overcome to pave the way towards a loophole-free Bell test in this setup."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1108.1027","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1108.1027","created_at":"2026-05-18T02:01:03.039043+00:00"},{"alias_kind":"arxiv_version","alias_value":"1108.1027v1","created_at":"2026-05-18T02:01:03.039043+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1108.1027","created_at":"2026-05-18T02:01:03.039043+00:00"},{"alias_kind":"pith_short_12","alias_value":"JWNSWAE4S5JD","created_at":"2026-05-18T12:26:32.869790+00:00"},{"alias_kind":"pith_short_16","alias_value":"JWNSWAE4S5JDNAMU","created_at":"2026-05-18T12:26:32.869790+00:00"},{"alias_kind":"pith_short_8","alias_value":"JWNSWAE4","created_at":"2026-05-18T12:26:32.869790+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/JWNSWAE4S5JDNAMUW43BZ7ZS53","json":"https://pith.science/pith/JWNSWAE4S5JDNAMUW43BZ7ZS53.json","graph_json":"https://pith.science/api/pith-number/JWNSWAE4S5JDNAMUW43BZ7ZS53/graph.json","events_json":"https://pith.science/api/pith-number/JWNSWAE4S5JDNAMUW43BZ7ZS53/events.json","paper":"https://pith.science/paper/JWNSWAE4"},"agent_actions":{"view_html":"https://pith.science/pith/JWNSWAE4S5JDNAMUW43BZ7ZS53","download_json":"https://pith.science/pith/JWNSWAE4S5JDNAMUW43BZ7ZS53.json","view_paper":"https://pith.science/paper/JWNSWAE4","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1108.1027&json=true","fetch_graph":"https://pith.science/api/pith-number/JWNSWAE4S5JDNAMUW43BZ7ZS53/graph.json","fetch_events":"https://pith.science/api/pith-number/JWNSWAE4S5JDNAMUW43BZ7ZS53/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/JWNSWAE4S5JDNAMUW43BZ7ZS53/action/timestamp_anchor","attest_storage":"https://pith.science/pith/JWNSWAE4S5JDNAMUW43BZ7ZS53/action/storage_attestation","attest_author":"https://pith.science/pith/JWNSWAE4S5JDNAMUW43BZ7ZS53/action/author_attestation","sign_citation":"https://pith.science/pith/JWNSWAE4S5JDNAMUW43BZ7ZS53/action/citation_signature","submit_replication":"https://pith.science/pith/JWNSWAE4S5JDNAMUW43BZ7ZS53/action/replication_record"}},"created_at":"2026-05-18T02:01:03.039043+00:00","updated_at":"2026-05-18T02:01:03.039043+00:00"}