{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:XB2UPAFMMCHDXNCAISX36X3REK","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":"9ddfb3bc297c4f1bf265650c798b8be3f6ad86f4404b95e0bc54c1b4b6c2e3d8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2008-02-04T18:34:26Z","title_canon_sha256":"0eda45a8c3fcd76ae3908268e43702d8d00eb541aaea6a2dea59eb944c0175d7"},"schema_version":"1.0","source":{"id":"0802.0472","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0802.0472","created_at":"2026-05-18T03:24:43Z"},{"alias_kind":"arxiv_version","alias_value":"0802.0472v2","created_at":"2026-05-18T03:24:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0802.0472","created_at":"2026-05-18T03:24:43Z"},{"alias_kind":"pith_short_12","alias_value":"XB2UPAFMMCHD","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"XB2UPAFMMCHDXNCA","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"XB2UPAFM","created_at":"2026-05-18T12:25:58Z"}],"graph_snapshots":[{"event_id":"sha256:8bc2049b4d63fd9ed26f2ec6de649ca180a5fe21c37b6cd9de2170110865e955","target":"graph","created_at":"2026-05-18T03:24:43Z","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":"The human eye can detect optical signals containing only a few photons. We investigate the possibility to demonstrate entanglement with such biological detectors. While one person could not detect entanglement by simply observing photons, we discuss the possibility for several observers to demonstrate entanglement in a Bell-type experiment, in which standard detectors are replaced by human eyes. Using a toy model for biological detectors that captures their main characteristic, namely a detection threshold, we show that Bell inequalities can be violated, thus demonstrating entanglement. Remark","authors_text":"Cyril Branciard, Nicolas Brunner, Nicolas Gisin","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2008-02-04T18:34:26Z","title":"Can one see entanglement ?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0802.0472","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:deb724c1bc3cb421cada0efbefd214b8bf639c15f019e0030c1acc21c030d14e","target":"record","created_at":"2026-05-18T03:24:43Z","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":"9ddfb3bc297c4f1bf265650c798b8be3f6ad86f4404b95e0bc54c1b4b6c2e3d8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2008-02-04T18:34:26Z","title_canon_sha256":"0eda45a8c3fcd76ae3908268e43702d8d00eb541aaea6a2dea59eb944c0175d7"},"schema_version":"1.0","source":{"id":"0802.0472","kind":"arxiv","version":2}},"canonical_sha256":"b8754780ac608e3bb44044afbf5f7122874430c22b57dd4a28d8e92dd7944282","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b8754780ac608e3bb44044afbf5f7122874430c22b57dd4a28d8e92dd7944282","first_computed_at":"2026-05-18T03:24:43.125027Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:24:43.125027Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"LrB54fX76CtdbxY/xZVuhj8NadPbNB3V7++kQzbepVTtzFLoflxg6WN2//hE1dRSGvBJxw+2YOUB+sXYg5gADQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:24:43.125786Z","signed_message":"canonical_sha256_bytes"},"source_id":"0802.0472","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:deb724c1bc3cb421cada0efbefd214b8bf639c15f019e0030c1acc21c030d14e","sha256:8bc2049b4d63fd9ed26f2ec6de649ca180a5fe21c37b6cd9de2170110865e955"],"state_sha256":"1e1b97388ba89ae0273ec592c9efc6dcc64f8c6c3b0e5e65868235f9678ddff0"}