{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:532QIEVDKMBJAXKFUEPK2HZOGE","short_pith_number":"pith:532QIEVD","canonical_record":{"source":{"id":"1502.02996","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-02-10T17:18:45Z","cross_cats_sorted":[],"title_canon_sha256":"bb81a167c08c16ad00222529dd3f1f27dc795796f3491d1067a5b60be40f0c46","abstract_canon_sha256":"5e1293f3cecd34117059318e08ad3b0dda60a51927eba2727490482e5a551f14"},"schema_version":"1.0"},"canonical_sha256":"eef50412a35302905d45a11ead1f2e3123c7964a031a7cfa568a815a1086bf42","source":{"kind":"arxiv","id":"1502.02996","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1502.02996","created_at":"2026-05-18T02:17:00Z"},{"alias_kind":"arxiv_version","alias_value":"1502.02996v1","created_at":"2026-05-18T02:17:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1502.02996","created_at":"2026-05-18T02:17:00Z"},{"alias_kind":"pith_short_12","alias_value":"532QIEVDKMBJ","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_16","alias_value":"532QIEVDKMBJAXKF","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_8","alias_value":"532QIEVD","created_at":"2026-05-18T12:29:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:532QIEVDKMBJAXKFUEPK2HZOGE","target":"record","payload":{"canonical_record":{"source":{"id":"1502.02996","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-02-10T17:18:45Z","cross_cats_sorted":[],"title_canon_sha256":"bb81a167c08c16ad00222529dd3f1f27dc795796f3491d1067a5b60be40f0c46","abstract_canon_sha256":"5e1293f3cecd34117059318e08ad3b0dda60a51927eba2727490482e5a551f14"},"schema_version":"1.0"},"canonical_sha256":"eef50412a35302905d45a11ead1f2e3123c7964a031a7cfa568a815a1086bf42","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:17:00.508469Z","signature_b64":"/qjl85Vw4d25wVaq1rV+NY7eQCm7bZOR/DOJan43cvodbEof9X49mXhv23z+BfO6nPyZqguoHEwb9bWEWte1Ag==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"eef50412a35302905d45a11ead1f2e3123c7964a031a7cfa568a815a1086bf42","last_reissued_at":"2026-05-18T02:17:00.507787Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:17:00.507787Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1502.02996","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":"2026-05-18T02:17:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"K7/KFFnvHFZnz6wu4jD6SrPeEF6HV5NAgs5bkiihb5EU1pp+yGFjWSe6FM+wkHpwJAssn/dQsYLCcxnMdaieAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T13:00:26.965536Z"},"content_sha256":"e6815e946000d69c9e85393ee9ef702ab820e243a0120be43039d44563af6b61","schema_version":"1.0","event_id":"sha256:e6815e946000d69c9e85393ee9ef702ab820e243a0120be43039d44563af6b61"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:532QIEVDKMBJAXKFUEPK2HZOGE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Revealing Genuine Optical-Path Entanglement","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"A. Martin, F. Monteiro, H. Zbinden, J.-D. Bancal, N. Sangouard, R.T. Thew, T. Guerreiro, V. Caprara Vivoli","submitted_at":"2015-02-10T17:18:45Z","abstract_excerpt":"How can one detect entanglement between multiple optical paths sharing a single photon? We address this question by proposing a scalable protocol, which only uses local measurements where single photon detection is combined with small displacement operations. The resulting entanglement witness does not require post-selection, nor assumptions about the photon number in each path. Furthermore, it guarantees that entanglement lies in a subspace with at most one photon per optical path and reveals genuinely multipartite entanglement. We demonstrate its scalability and resistance to loss by perform"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.02996","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":"2026-05-18T02:17:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"L8ovnUW0cIRMjXzXhO/JEpd8bo5/gsoZ9Eph8CnP+Q6w8ySowTXqnTLA2YRAi4j/fry1aIee4Al3tZkr2Hb2Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T13:00:26.966229Z"},"content_sha256":"f73c460db961298cf44f038696ca38894c69b34e6d34e58a89f0cb6267c2f8e8","schema_version":"1.0","event_id":"sha256:f73c460db961298cf44f038696ca38894c69b34e6d34e58a89f0cb6267c2f8e8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/532QIEVDKMBJAXKFUEPK2HZOGE/bundle.json","state_url":"https://pith.science/pith/532QIEVDKMBJAXKFUEPK2HZOGE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/532QIEVDKMBJAXKFUEPK2HZOGE/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":"2026-05-27T13:00:26Z","links":{"resolver":"https://pith.science/pith/532QIEVDKMBJAXKFUEPK2HZOGE","bundle":"https://pith.science/pith/532QIEVDKMBJAXKFUEPK2HZOGE/bundle.json","state":"https://pith.science/pith/532QIEVDKMBJAXKFUEPK2HZOGE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/532QIEVDKMBJAXKFUEPK2HZOGE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:532QIEVDKMBJAXKFUEPK2HZOGE","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":"5e1293f3cecd34117059318e08ad3b0dda60a51927eba2727490482e5a551f14","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-02-10T17:18:45Z","title_canon_sha256":"bb81a167c08c16ad00222529dd3f1f27dc795796f3491d1067a5b60be40f0c46"},"schema_version":"1.0","source":{"id":"1502.02996","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1502.02996","created_at":"2026-05-18T02:17:00Z"},{"alias_kind":"arxiv_version","alias_value":"1502.02996v1","created_at":"2026-05-18T02:17:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1502.02996","created_at":"2026-05-18T02:17:00Z"},{"alias_kind":"pith_short_12","alias_value":"532QIEVDKMBJ","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_16","alias_value":"532QIEVDKMBJAXKF","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_8","alias_value":"532QIEVD","created_at":"2026-05-18T12:29:05Z"}],"graph_snapshots":[{"event_id":"sha256:f73c460db961298cf44f038696ca38894c69b34e6d34e58a89f0cb6267c2f8e8","target":"graph","created_at":"2026-05-18T02:17:00Z","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":"How can one detect entanglement between multiple optical paths sharing a single photon? We address this question by proposing a scalable protocol, which only uses local measurements where single photon detection is combined with small displacement operations. The resulting entanglement witness does not require post-selection, nor assumptions about the photon number in each path. Furthermore, it guarantees that entanglement lies in a subspace with at most one photon per optical path and reveals genuinely multipartite entanglement. We demonstrate its scalability and resistance to loss by perform","authors_text":"A. Martin, F. Monteiro, H. Zbinden, J.-D. Bancal, N. Sangouard, R.T. Thew, T. Guerreiro, V. Caprara Vivoli","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-02-10T17:18:45Z","title":"Revealing Genuine Optical-Path Entanglement"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.02996","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:e6815e946000d69c9e85393ee9ef702ab820e243a0120be43039d44563af6b61","target":"record","created_at":"2026-05-18T02:17:00Z","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":"5e1293f3cecd34117059318e08ad3b0dda60a51927eba2727490482e5a551f14","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-02-10T17:18:45Z","title_canon_sha256":"bb81a167c08c16ad00222529dd3f1f27dc795796f3491d1067a5b60be40f0c46"},"schema_version":"1.0","source":{"id":"1502.02996","kind":"arxiv","version":1}},"canonical_sha256":"eef50412a35302905d45a11ead1f2e3123c7964a031a7cfa568a815a1086bf42","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"eef50412a35302905d45a11ead1f2e3123c7964a031a7cfa568a815a1086bf42","first_computed_at":"2026-05-18T02:17:00.507787Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:17:00.507787Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/qjl85Vw4d25wVaq1rV+NY7eQCm7bZOR/DOJan43cvodbEof9X49mXhv23z+BfO6nPyZqguoHEwb9bWEWte1Ag==","signature_status":"signed_v1","signed_at":"2026-05-18T02:17:00.508469Z","signed_message":"canonical_sha256_bytes"},"source_id":"1502.02996","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e6815e946000d69c9e85393ee9ef702ab820e243a0120be43039d44563af6b61","sha256:f73c460db961298cf44f038696ca38894c69b34e6d34e58a89f0cb6267c2f8e8"],"state_sha256":"7294d1ecae30050b2f411f24c359bf795e7ddcc40dd2d297ae4c4c1bd4e11e27"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Yu2zk+tM/Im08NNHu8ZY1acAtrnPv7reuBhYBtZK+DE58lVxGg4uiZLo7zTYrnOe+XFy88V8G3osx237kOzJAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T13:00:26.969665Z","bundle_sha256":"a21d324c9916932b45618e38322d8f517657962ade4bd83c683f843c70a5cea2"}}