{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:LS7PQLXO2IO57Y6RJYINFEUWYO","short_pith_number":"pith:LS7PQLXO","canonical_record":{"source":{"id":"1904.06200","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-04-12T12:48:03Z","cross_cats_sorted":[],"title_canon_sha256":"ddd99274cb5ed9ce79252beacdd363194822b8b929a42361a94830bcbfe8f37c","abstract_canon_sha256":"d11ce16386f4db4216c69272c2d4d8ddbf53fef624b8cc4d271aef389ea826d7"},"schema_version":"1.0"},"canonical_sha256":"5cbef82eeed21ddfe3d14e10d29296c3b861cc5383fe8fb7ae7a9cc5fd44f238","source":{"kind":"arxiv","id":"1904.06200","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.06200","created_at":"2026-05-17T23:46:11Z"},{"alias_kind":"arxiv_version","alias_value":"1904.06200v1","created_at":"2026-05-17T23:46:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.06200","created_at":"2026-05-17T23:46:11Z"},{"alias_kind":"pith_short_12","alias_value":"LS7PQLXO2IO5","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_16","alias_value":"LS7PQLXO2IO57Y6R","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_8","alias_value":"LS7PQLXO","created_at":"2026-05-18T12:33:21Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:LS7PQLXO2IO57Y6RJYINFEUWYO","target":"record","payload":{"canonical_record":{"source":{"id":"1904.06200","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-04-12T12:48:03Z","cross_cats_sorted":[],"title_canon_sha256":"ddd99274cb5ed9ce79252beacdd363194822b8b929a42361a94830bcbfe8f37c","abstract_canon_sha256":"d11ce16386f4db4216c69272c2d4d8ddbf53fef624b8cc4d271aef389ea826d7"},"schema_version":"1.0"},"canonical_sha256":"5cbef82eeed21ddfe3d14e10d29296c3b861cc5383fe8fb7ae7a9cc5fd44f238","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:46:11.759228Z","signature_b64":"jI2QhIBlxxvazOtbGVTMQE/DF70bVHIxO5sEQEBm5QJ2djrs0ZNprxJenV7mbkGXkWriZ0AJRKK6K+QfVfRzCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5cbef82eeed21ddfe3d14e10d29296c3b861cc5383fe8fb7ae7a9cc5fd44f238","last_reissued_at":"2026-05-17T23:46:11.758598Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:46:11.758598Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1904.06200","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":"2026-05-17T23:46:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TV0iCxIQ++h53t1k2nQ3DfE+J5BwU0Pn5y4Vid7ZGVuUT5gT5Vg9bdFmbDfecr5A9vXvK8/Awc1vrl0lIZg2DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T02:34:55.824524Z"},"content_sha256":"9d536b0d2b3b1e020d8f732ec3f4c478607fe7db3732ced9b312bfef3a04a337","schema_version":"1.0","event_id":"sha256:9d536b0d2b3b1e020d8f732ec3f4c478607fe7db3732ced9b312bfef3a04a337"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:LS7PQLXO2IO57Y6RJYINFEUWYO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Experimental investigation of linear-optics-based quantum target detection","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"G. H. Aguilar, J. Thompson, L. C. C\\'eleri, M. A. de Souza, M. Gu, R. M. Gomes, S. P. Walborn","submitted_at":"2019-04-12T12:48:03Z","abstract_excerpt":"The development of new techniques to improve measurements is crucial for all sciences. By employing quantum systems as sensors to probe some physical property of interest allows the application of quantum resources, such as coherent superpositions and quantum correlations, to increase measurement precision. Here we experimentally investigate a scheme for quantum target detection based on linear optical measurment devices, when the object is immersed in unpolarized background light. By comparing the quantum (polarization-entangled photon pairs) and the classical (separable polarization states),"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.06200","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":"2026-05-17T23:46:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0GT8Lb6QE0vy8l4knQ6Oa0Sp+8F4AVzLHLCSQpMzyQz7aO0hdYhEothui9/BoV4yBbaQuZ4jxaKQGibqlkasCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T02:34:55.825239Z"},"content_sha256":"90cd5a8c14b65958990ec7cd40f35980539cbb7cee6cf7a436cf03a7018c9b79","schema_version":"1.0","event_id":"sha256:90cd5a8c14b65958990ec7cd40f35980539cbb7cee6cf7a436cf03a7018c9b79"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LS7PQLXO2IO57Y6RJYINFEUWYO/bundle.json","state_url":"https://pith.science/pith/LS7PQLXO2IO57Y6RJYINFEUWYO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LS7PQLXO2IO57Y6RJYINFEUWYO/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":"2026-05-30T02:34:55Z","links":{"resolver":"https://pith.science/pith/LS7PQLXO2IO57Y6RJYINFEUWYO","bundle":"https://pith.science/pith/LS7PQLXO2IO57Y6RJYINFEUWYO/bundle.json","state":"https://pith.science/pith/LS7PQLXO2IO57Y6RJYINFEUWYO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LS7PQLXO2IO57Y6RJYINFEUWYO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:LS7PQLXO2IO57Y6RJYINFEUWYO","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":"d11ce16386f4db4216c69272c2d4d8ddbf53fef624b8cc4d271aef389ea826d7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-04-12T12:48:03Z","title_canon_sha256":"ddd99274cb5ed9ce79252beacdd363194822b8b929a42361a94830bcbfe8f37c"},"schema_version":"1.0","source":{"id":"1904.06200","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.06200","created_at":"2026-05-17T23:46:11Z"},{"alias_kind":"arxiv_version","alias_value":"1904.06200v1","created_at":"2026-05-17T23:46:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.06200","created_at":"2026-05-17T23:46:11Z"},{"alias_kind":"pith_short_12","alias_value":"LS7PQLXO2IO5","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_16","alias_value":"LS7PQLXO2IO57Y6R","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_8","alias_value":"LS7PQLXO","created_at":"2026-05-18T12:33:21Z"}],"graph_snapshots":[{"event_id":"sha256:90cd5a8c14b65958990ec7cd40f35980539cbb7cee6cf7a436cf03a7018c9b79","target":"graph","created_at":"2026-05-17T23:46:11Z","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 development of new techniques to improve measurements is crucial for all sciences. By employing quantum systems as sensors to probe some physical property of interest allows the application of quantum resources, such as coherent superpositions and quantum correlations, to increase measurement precision. Here we experimentally investigate a scheme for quantum target detection based on linear optical measurment devices, when the object is immersed in unpolarized background light. By comparing the quantum (polarization-entangled photon pairs) and the classical (separable polarization states),","authors_text":"G. H. Aguilar, J. Thompson, L. C. C\\'eleri, M. A. de Souza, M. Gu, R. M. Gomes, S. P. Walborn","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-04-12T12:48:03Z","title":"Experimental investigation of linear-optics-based quantum target detection"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.06200","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":"sha256:9d536b0d2b3b1e020d8f732ec3f4c478607fe7db3732ced9b312bfef3a04a337","target":"record","created_at":"2026-05-17T23:46:11Z","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":"d11ce16386f4db4216c69272c2d4d8ddbf53fef624b8cc4d271aef389ea826d7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-04-12T12:48:03Z","title_canon_sha256":"ddd99274cb5ed9ce79252beacdd363194822b8b929a42361a94830bcbfe8f37c"},"schema_version":"1.0","source":{"id":"1904.06200","kind":"arxiv","version":1}},"canonical_sha256":"5cbef82eeed21ddfe3d14e10d29296c3b861cc5383fe8fb7ae7a9cc5fd44f238","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5cbef82eeed21ddfe3d14e10d29296c3b861cc5383fe8fb7ae7a9cc5fd44f238","first_computed_at":"2026-05-17T23:46:11.758598Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:46:11.758598Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jI2QhIBlxxvazOtbGVTMQE/DF70bVHIxO5sEQEBm5QJ2djrs0ZNprxJenV7mbkGXkWriZ0AJRKK6K+QfVfRzCg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:46:11.759228Z","signed_message":"canonical_sha256_bytes"},"source_id":"1904.06200","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9d536b0d2b3b1e020d8f732ec3f4c478607fe7db3732ced9b312bfef3a04a337","sha256:90cd5a8c14b65958990ec7cd40f35980539cbb7cee6cf7a436cf03a7018c9b79"],"state_sha256":"2dcfe27c617ab9a5842f29d75f141d9c1d9fddf0d9a630ed58b1b4d4553f9a41"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jLZUu2+bXfR8esTimgYLF59XtibDDw8XpfkgQEOX9upOvIwVn+IIHXdwYLzU33HPogs2wFMvK/eLlCZ2qF4eAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T02:34:55.832105Z","bundle_sha256":"73d00c7db433e180368cb237dbae0c99baceba3d39851df9551ce9f67aa46473"}}