{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:OPY7ZPLN4ZNH5CYAABSKKEOA5Q","short_pith_number":"pith:OPY7ZPLN","canonical_record":{"source":{"id":"1711.09171","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-11-25T00:04:31Z","cross_cats_sorted":[],"title_canon_sha256":"ad5a94e7ba0434dfe26f9b65cb75c49f2e0e6b53a7de9e84c2fedd106182c4e7","abstract_canon_sha256":"6e5c8fd562e8b83a994ddd7c288d4357b20462407f00695034ce5a4aa73988ad"},"schema_version":"1.0"},"canonical_sha256":"73f1fcbd6de65a7e8b000064a511c0ec391069d3f0ec9cff04897e63eae20a7d","source":{"kind":"arxiv","id":"1711.09171","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1711.09171","created_at":"2026-05-17T23:55:23Z"},{"alias_kind":"arxiv_version","alias_value":"1711.09171v3","created_at":"2026-05-17T23:55:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1711.09171","created_at":"2026-05-17T23:55:23Z"},{"alias_kind":"pith_short_12","alias_value":"OPY7ZPLN4ZNH","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_16","alias_value":"OPY7ZPLN4ZNH5CYA","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_8","alias_value":"OPY7ZPLN","created_at":"2026-05-18T12:31:34Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:OPY7ZPLN4ZNH5CYAABSKKEOA5Q","target":"record","payload":{"canonical_record":{"source":{"id":"1711.09171","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-11-25T00:04:31Z","cross_cats_sorted":[],"title_canon_sha256":"ad5a94e7ba0434dfe26f9b65cb75c49f2e0e6b53a7de9e84c2fedd106182c4e7","abstract_canon_sha256":"6e5c8fd562e8b83a994ddd7c288d4357b20462407f00695034ce5a4aa73988ad"},"schema_version":"1.0"},"canonical_sha256":"73f1fcbd6de65a7e8b000064a511c0ec391069d3f0ec9cff04897e63eae20a7d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:55:23.142701Z","signature_b64":"0EoY9Nsg5RDIrqTpnNC/EC43s9V7VXkKay6E+9AYeJdhPlkgM3S5flmPNnWW7G6zVTElYdQaOINPYYPI+ATOAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"73f1fcbd6de65a7e8b000064a511c0ec391069d3f0ec9cff04897e63eae20a7d","last_reissued_at":"2026-05-17T23:55:23.142274Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:55:23.142274Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1711.09171","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:55:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CfA8mO8wyn8cBK/SWBnFchAh8y48BdouhwT20UeJwNuSSBAMWt+g4SQ+fYHRz/EBXSKV50JK3pNwvCcgng+yAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T06:09:07.349394Z"},"content_sha256":"9651ce860ed071ce388e3bf01140ab4b0c4a4ae25b9aa03b5ed7dde933784486","schema_version":"1.0","event_id":"sha256:9651ce860ed071ce388e3bf01140ab4b0c4a4ae25b9aa03b5ed7dde933784486"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:OPY7ZPLN4ZNH5CYAABSKKEOA5Q","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Interaction-Free Ghost-Imaging of Structured Objects","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Alicia Sit, Avshalom C. Elitzur, Ebrahim Karimi, Eliahu Cohen, Fr\\'ed\\'eric Bouchard, Hugo Larocque, James L. Harden, Robert W. Boyd, Yingwen Zhang","submitted_at":"2017-11-25T00:04:31Z","abstract_excerpt":"Quantum - or classically correlated - light can be employed in various ways to improve resolution and measurement sensitivity. In an \"interaction-free\" measurement, a single photon can be used to reveal the presence of an object placed within one arm of an interferometer without being absorbed by it. This method has previously been applied to imaging. With a technique known as \"ghost imaging\", entangled photon pairs are used for detecting an opaque object with significantly improved signal-to-noise ratio while preventing over-illumination. Here, we integrate these two methods to obtain a new i"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1711.09171","kind":"arxiv","version":3},"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":"2026-05-17T23:55:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+bmZScApIc01qRKgcmHkh+LwrA05EQIqQuo1u1R4KUOoxzWS5P0p0u0Ey1VkfU/NTmwK84Jv3DGR6QW9OF3ADA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T06:09:07.349985Z"},"content_sha256":"ce1aed59c6152fab6848f1422d8bdd4c5ff5bf702fe1154262a63fe0facf7fd0","schema_version":"1.0","event_id":"sha256:ce1aed59c6152fab6848f1422d8bdd4c5ff5bf702fe1154262a63fe0facf7fd0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OPY7ZPLN4ZNH5CYAABSKKEOA5Q/bundle.json","state_url":"https://pith.science/pith/OPY7ZPLN4ZNH5CYAABSKKEOA5Q/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OPY7ZPLN4ZNH5CYAABSKKEOA5Q/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":"2026-05-23T06:09:07Z","links":{"resolver":"https://pith.science/pith/OPY7ZPLN4ZNH5CYAABSKKEOA5Q","bundle":"https://pith.science/pith/OPY7ZPLN4ZNH5CYAABSKKEOA5Q/bundle.json","state":"https://pith.science/pith/OPY7ZPLN4ZNH5CYAABSKKEOA5Q/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OPY7ZPLN4ZNH5CYAABSKKEOA5Q/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:OPY7ZPLN4ZNH5CYAABSKKEOA5Q","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":"6e5c8fd562e8b83a994ddd7c288d4357b20462407f00695034ce5a4aa73988ad","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-11-25T00:04:31Z","title_canon_sha256":"ad5a94e7ba0434dfe26f9b65cb75c49f2e0e6b53a7de9e84c2fedd106182c4e7"},"schema_version":"1.0","source":{"id":"1711.09171","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1711.09171","created_at":"2026-05-17T23:55:23Z"},{"alias_kind":"arxiv_version","alias_value":"1711.09171v3","created_at":"2026-05-17T23:55:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1711.09171","created_at":"2026-05-17T23:55:23Z"},{"alias_kind":"pith_short_12","alias_value":"OPY7ZPLN4ZNH","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_16","alias_value":"OPY7ZPLN4ZNH5CYA","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_8","alias_value":"OPY7ZPLN","created_at":"2026-05-18T12:31:34Z"}],"graph_snapshots":[{"event_id":"sha256:ce1aed59c6152fab6848f1422d8bdd4c5ff5bf702fe1154262a63fe0facf7fd0","target":"graph","created_at":"2026-05-17T23:55:23Z","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":"Quantum - or classically correlated - light can be employed in various ways to improve resolution and measurement sensitivity. In an \"interaction-free\" measurement, a single photon can be used to reveal the presence of an object placed within one arm of an interferometer without being absorbed by it. This method has previously been applied to imaging. With a technique known as \"ghost imaging\", entangled photon pairs are used for detecting an opaque object with significantly improved signal-to-noise ratio while preventing over-illumination. Here, we integrate these two methods to obtain a new i","authors_text":"Alicia Sit, Avshalom C. Elitzur, Ebrahim Karimi, Eliahu Cohen, Fr\\'ed\\'eric Bouchard, Hugo Larocque, James L. Harden, Robert W. Boyd, Yingwen Zhang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-11-25T00:04:31Z","title":"Interaction-Free Ghost-Imaging of Structured Objects"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1711.09171","kind":"arxiv","version":3},"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":"sha256:9651ce860ed071ce388e3bf01140ab4b0c4a4ae25b9aa03b5ed7dde933784486","target":"record","created_at":"2026-05-17T23:55:23Z","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":"6e5c8fd562e8b83a994ddd7c288d4357b20462407f00695034ce5a4aa73988ad","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-11-25T00:04:31Z","title_canon_sha256":"ad5a94e7ba0434dfe26f9b65cb75c49f2e0e6b53a7de9e84c2fedd106182c4e7"},"schema_version":"1.0","source":{"id":"1711.09171","kind":"arxiv","version":3}},"canonical_sha256":"73f1fcbd6de65a7e8b000064a511c0ec391069d3f0ec9cff04897e63eae20a7d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"73f1fcbd6de65a7e8b000064a511c0ec391069d3f0ec9cff04897e63eae20a7d","first_computed_at":"2026-05-17T23:55:23.142274Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:55:23.142274Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"0EoY9Nsg5RDIrqTpnNC/EC43s9V7VXkKay6E+9AYeJdhPlkgM3S5flmPNnWW7G6zVTElYdQaOINPYYPI+ATOAg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:55:23.142701Z","signed_message":"canonical_sha256_bytes"},"source_id":"1711.09171","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9651ce860ed071ce388e3bf01140ab4b0c4a4ae25b9aa03b5ed7dde933784486","sha256:ce1aed59c6152fab6848f1422d8bdd4c5ff5bf702fe1154262a63fe0facf7fd0"],"state_sha256":"77487f986646973d5fa8d3aa560de2b756445d63811018b66e6e715e697327aa"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BTZG5dFDwx5BqL3OtefIg85K1OYIyxlXWNcuL/rU0oB9m+r6bWWE4r8SswW8vGgiZntbUBiWQOOfi/jSj4K8Cg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-23T06:09:07.353171Z","bundle_sha256":"92fc8ba2db68a5145d188dbfd36a88f223ea80f50a4d10e1b05d3d40c084ed1c"}}