{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:7P53EIGJJNDDIWF6H7FF4U6WLQ","short_pith_number":"pith:7P53EIGJ","canonical_record":{"source":{"id":"1208.6222","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-08-30T16:15:19Z","cross_cats_sorted":[],"title_canon_sha256":"0bd63d237249c4d18dd559d230ec850d9b8ef7a70cafebc09102ef2ae9b31737","abstract_canon_sha256":"6343b22f047baa8855319dd7bc547c5ab7911ad3fd9b0391aad31ee1cd2e361a"},"schema_version":"1.0"},"canonical_sha256":"fbfbb220c94b463458be3fca5e53d65c1cf167c86d8a7dfefcd2f8e20dea211f","source":{"kind":"arxiv","id":"1208.6222","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1208.6222","created_at":"2026-05-18T01:54:49Z"},{"alias_kind":"arxiv_version","alias_value":"1208.6222v1","created_at":"2026-05-18T01:54:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1208.6222","created_at":"2026-05-18T01:54:49Z"},{"alias_kind":"pith_short_12","alias_value":"7P53EIGJJNDD","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_16","alias_value":"7P53EIGJJNDDIWF6","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_8","alias_value":"7P53EIGJ","created_at":"2026-05-18T12:26:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:7P53EIGJJNDDIWF6H7FF4U6WLQ","target":"record","payload":{"canonical_record":{"source":{"id":"1208.6222","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-08-30T16:15:19Z","cross_cats_sorted":[],"title_canon_sha256":"0bd63d237249c4d18dd559d230ec850d9b8ef7a70cafebc09102ef2ae9b31737","abstract_canon_sha256":"6343b22f047baa8855319dd7bc547c5ab7911ad3fd9b0391aad31ee1cd2e361a"},"schema_version":"1.0"},"canonical_sha256":"fbfbb220c94b463458be3fca5e53d65c1cf167c86d8a7dfefcd2f8e20dea211f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:54:49.500310Z","signature_b64":"HL7JAik9xE+BUODiB+5MYrqmmtJVRW+4rz1yUYWqx+EpVMj3LmaikMKeSmpl0/fV3skolksu2aNTT39Ehl4DBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fbfbb220c94b463458be3fca5e53d65c1cf167c86d8a7dfefcd2f8e20dea211f","last_reissued_at":"2026-05-18T01:54:49.499636Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:54:49.499636Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1208.6222","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":"2026-05-18T01:54:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZY/2aPxzxbgUsA1GnZ1kOC+x1pzFqh4zk/D61fx8nP4Hb6Mn5GKZ0CROWsqQdG97It+FMErbTUq7wP0/VHu6AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T08:36:04.342693Z"},"content_sha256":"38cde0031fb43a3da24dd5084fd806cadef5d2d10ce1101bb908f7070041c6f3","schema_version":"1.0","event_id":"sha256:38cde0031fb43a3da24dd5084fd806cadef5d2d10ce1101bb908f7070041c6f3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:7P53EIGJJNDDIWF6H7FF4U6WLQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Experimental Observation of Quantum Correlations in Modular Variables","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"G. F. Borges, J. Ferraz, M. A. D. Carvalho, P. L. de Assis, S. P\\'adua, S. P. Walborn","submitted_at":"2012-08-30T16:15:19Z","abstract_excerpt":"We experimentally detect entanglement in modular position and momentum variables of photon pairs which have passed through $D$-slit apertures. We first employ an entanglement criteria recently proposed in [Phys. Rev. Lett. {\\bf 106}, 210501 (2011)], using variances of the modular variables. We then propose an entanglement witness for modular variables based on the Shannon entropy, and test it experimentally. Finally, we derive criteria for Einstein-Podolsky-Rosen-Steering correlations using variances and entropy functions. In both cases, the entropic criteria are more successful at identifying"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1208.6222","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":"2026-05-18T01:54:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"y183f3BT17TBJKwQGFUXJ/ytukUt4a/cALGpvF46I9T/2UPhuwmG/FHAorgkqAZpoECHh93lzHJtJkJhNJ4NAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T08:36:04.343046Z"},"content_sha256":"0cc3591a47ffa440bbb3c36ddb7562d9b94bbe0453f8b4aeb8edc7a17221a304","schema_version":"1.0","event_id":"sha256:0cc3591a47ffa440bbb3c36ddb7562d9b94bbe0453f8b4aeb8edc7a17221a304"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7P53EIGJJNDDIWF6H7FF4U6WLQ/bundle.json","state_url":"https://pith.science/pith/7P53EIGJJNDDIWF6H7FF4U6WLQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7P53EIGJJNDDIWF6H7FF4U6WLQ/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":"2026-06-03T08:36:04Z","links":{"resolver":"https://pith.science/pith/7P53EIGJJNDDIWF6H7FF4U6WLQ","bundle":"https://pith.science/pith/7P53EIGJJNDDIWF6H7FF4U6WLQ/bundle.json","state":"https://pith.science/pith/7P53EIGJJNDDIWF6H7FF4U6WLQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7P53EIGJJNDDIWF6H7FF4U6WLQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:7P53EIGJJNDDIWF6H7FF4U6WLQ","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":"6343b22f047baa8855319dd7bc547c5ab7911ad3fd9b0391aad31ee1cd2e361a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-08-30T16:15:19Z","title_canon_sha256":"0bd63d237249c4d18dd559d230ec850d9b8ef7a70cafebc09102ef2ae9b31737"},"schema_version":"1.0","source":{"id":"1208.6222","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1208.6222","created_at":"2026-05-18T01:54:49Z"},{"alias_kind":"arxiv_version","alias_value":"1208.6222v1","created_at":"2026-05-18T01:54:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1208.6222","created_at":"2026-05-18T01:54:49Z"},{"alias_kind":"pith_short_12","alias_value":"7P53EIGJJNDD","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_16","alias_value":"7P53EIGJJNDDIWF6","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_8","alias_value":"7P53EIGJ","created_at":"2026-05-18T12:26:58Z"}],"graph_snapshots":[{"event_id":"sha256:0cc3591a47ffa440bbb3c36ddb7562d9b94bbe0453f8b4aeb8edc7a17221a304","target":"graph","created_at":"2026-05-18T01:54:49Z","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":"We experimentally detect entanglement in modular position and momentum variables of photon pairs which have passed through $D$-slit apertures. We first employ an entanglement criteria recently proposed in [Phys. Rev. Lett. {\\bf 106}, 210501 (2011)], using variances of the modular variables. We then propose an entanglement witness for modular variables based on the Shannon entropy, and test it experimentally. Finally, we derive criteria for Einstein-Podolsky-Rosen-Steering correlations using variances and entropy functions. In both cases, the entropic criteria are more successful at identifying","authors_text":"G. F. Borges, J. Ferraz, M. A. D. Carvalho, P. L. de Assis, S. P\\'adua, S. P. Walborn","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-08-30T16:15:19Z","title":"Experimental Observation of Quantum Correlations in Modular Variables"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1208.6222","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":"sha256:38cde0031fb43a3da24dd5084fd806cadef5d2d10ce1101bb908f7070041c6f3","target":"record","created_at":"2026-05-18T01:54:49Z","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":"6343b22f047baa8855319dd7bc547c5ab7911ad3fd9b0391aad31ee1cd2e361a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-08-30T16:15:19Z","title_canon_sha256":"0bd63d237249c4d18dd559d230ec850d9b8ef7a70cafebc09102ef2ae9b31737"},"schema_version":"1.0","source":{"id":"1208.6222","kind":"arxiv","version":1}},"canonical_sha256":"fbfbb220c94b463458be3fca5e53d65c1cf167c86d8a7dfefcd2f8e20dea211f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fbfbb220c94b463458be3fca5e53d65c1cf167c86d8a7dfefcd2f8e20dea211f","first_computed_at":"2026-05-18T01:54:49.499636Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:54:49.499636Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HL7JAik9xE+BUODiB+5MYrqmmtJVRW+4rz1yUYWqx+EpVMj3LmaikMKeSmpl0/fV3skolksu2aNTT39Ehl4DBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:54:49.500310Z","signed_message":"canonical_sha256_bytes"},"source_id":"1208.6222","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:38cde0031fb43a3da24dd5084fd806cadef5d2d10ce1101bb908f7070041c6f3","sha256:0cc3591a47ffa440bbb3c36ddb7562d9b94bbe0453f8b4aeb8edc7a17221a304"],"state_sha256":"6319e3352800f35897e66a8ba9b994f456e5d8e3ad1e3326d17507e0bc0daeee"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SpW4uNZYo73eu52L0OI0SMECI9a8fCNHi5g6ECJZMauM3Ytnmi5gh/wSJgV8EUU+RqywCSFJ5MNQgGm0y1ZGAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T08:36:04.345035Z","bundle_sha256":"e48dc391f4b54dd3fbd9dfa7826123706dd9819a6e0ce20e77e881a1a8cd33eb"}}