{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:IO6FEQ7OGSBT23EFYHI4ECRXEQ","short_pith_number":"pith:IO6FEQ7O","canonical_record":{"source":{"id":"1203.4834","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-03-21T21:00:14Z","cross_cats_sorted":[],"title_canon_sha256":"5a3b9f237492e5b046700a6d9b67f0af596cddfac5754e76941c2c51c40351ef","abstract_canon_sha256":"b445db31dc04c4f75af46c8b21d033752bdf6730101b77f84be9f1900acf6388"},"schema_version":"1.0"},"canonical_sha256":"43bc5243ee34833d6c85c1d1c20a3724043360edcacc6f6144bf639d4f7be5d1","source":{"kind":"arxiv","id":"1203.4834","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1203.4834","created_at":"2026-05-18T01:58:04Z"},{"alias_kind":"arxiv_version","alias_value":"1203.4834v2","created_at":"2026-05-18T01:58:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1203.4834","created_at":"2026-05-18T01:58:04Z"},{"alias_kind":"pith_short_12","alias_value":"IO6FEQ7OGSBT","created_at":"2026-05-18T12:27:09Z"},{"alias_kind":"pith_short_16","alias_value":"IO6FEQ7OGSBT23EF","created_at":"2026-05-18T12:27:09Z"},{"alias_kind":"pith_short_8","alias_value":"IO6FEQ7O","created_at":"2026-05-18T12:27:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:IO6FEQ7OGSBT23EFYHI4ECRXEQ","target":"record","payload":{"canonical_record":{"source":{"id":"1203.4834","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-03-21T21:00:14Z","cross_cats_sorted":[],"title_canon_sha256":"5a3b9f237492e5b046700a6d9b67f0af596cddfac5754e76941c2c51c40351ef","abstract_canon_sha256":"b445db31dc04c4f75af46c8b21d033752bdf6730101b77f84be9f1900acf6388"},"schema_version":"1.0"},"canonical_sha256":"43bc5243ee34833d6c85c1d1c20a3724043360edcacc6f6144bf639d4f7be5d1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:58:04.827630Z","signature_b64":"LO5sc8asHnU4WkjI2JUA3Db+Y6hGTdqi3zWdvDID28UDNkmYhvlf5T78s0DIh05Z2VNuEv6PMKZQMIwYv32hDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"43bc5243ee34833d6c85c1d1c20a3724043360edcacc6f6144bf639d4f7be5d1","last_reissued_at":"2026-05-18T01:58:04.826974Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:58:04.826974Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1203.4834","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:58:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OVwnQ7iOfC3buiLJEwG/U7FI3VeiKbqmQGW9MzjtwN5DaauEz6jS+oRDVHlyzixeq2ApxjGiYQmp3B9iM38zDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T19:23:13.679422Z"},"content_sha256":"82e5431898799f118b0b793b8cad788807fa6c7ad98f29202aaac7c66383c2c7","schema_version":"1.0","event_id":"sha256:82e5431898799f118b0b793b8cad788807fa6c7ad98f29202aaac7c66383c2c7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:IO6FEQ7OGSBT23EFYHI4ECRXEQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Experimental delayed-choice entanglement swapping","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Anton Zeilinger, Johannes Kofler, Rupert Ursin, Stefan Zotter, Thomas Jennewein, \\v{C}aslav Brukner, Xiao-song Ma","submitted_at":"2012-03-21T21:00:14Z","abstract_excerpt":"Motivated by the question, which kind of physical interactions and processes are needed for the production of quantum entanglement, Peres has put forward the radical idea of delayed-choice entanglement swapping. There, entanglement can be \"produced a posteriori, after the entangled particles have been measured and may no longer exist\". In this work we report the first realization of Peres' gedanken experiment. Using four photons, we can actively delay the choice of measurement-implemented via a high-speed tunable bipartite state analyzer and a quantum random number generator-on two of the phot"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1203.4834","kind":"arxiv","version":2},"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":"2026-05-18T01:58:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7ldpTWPj1qcM5hrjrmSgxKQ2U5GFRkauwxuSkltXOgJyTgcy5VdVjaevoJFqVxQTYq7ohMEIS4CpkKuaQAB3CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T19:23:13.680027Z"},"content_sha256":"7936c805b68bb98a7891496b68a5e598d0f647ebbef8162a541254ce41a9e55f","schema_version":"1.0","event_id":"sha256:7936c805b68bb98a7891496b68a5e598d0f647ebbef8162a541254ce41a9e55f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IO6FEQ7OGSBT23EFYHI4ECRXEQ/bundle.json","state_url":"https://pith.science/pith/IO6FEQ7OGSBT23EFYHI4ECRXEQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IO6FEQ7OGSBT23EFYHI4ECRXEQ/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":"2026-05-25T19:23:13Z","links":{"resolver":"https://pith.science/pith/IO6FEQ7OGSBT23EFYHI4ECRXEQ","bundle":"https://pith.science/pith/IO6FEQ7OGSBT23EFYHI4ECRXEQ/bundle.json","state":"https://pith.science/pith/IO6FEQ7OGSBT23EFYHI4ECRXEQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IO6FEQ7OGSBT23EFYHI4ECRXEQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:IO6FEQ7OGSBT23EFYHI4ECRXEQ","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":"b445db31dc04c4f75af46c8b21d033752bdf6730101b77f84be9f1900acf6388","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-03-21T21:00:14Z","title_canon_sha256":"5a3b9f237492e5b046700a6d9b67f0af596cddfac5754e76941c2c51c40351ef"},"schema_version":"1.0","source":{"id":"1203.4834","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1203.4834","created_at":"2026-05-18T01:58:04Z"},{"alias_kind":"arxiv_version","alias_value":"1203.4834v2","created_at":"2026-05-18T01:58:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1203.4834","created_at":"2026-05-18T01:58:04Z"},{"alias_kind":"pith_short_12","alias_value":"IO6FEQ7OGSBT","created_at":"2026-05-18T12:27:09Z"},{"alias_kind":"pith_short_16","alias_value":"IO6FEQ7OGSBT23EF","created_at":"2026-05-18T12:27:09Z"},{"alias_kind":"pith_short_8","alias_value":"IO6FEQ7O","created_at":"2026-05-18T12:27:09Z"}],"graph_snapshots":[{"event_id":"sha256:7936c805b68bb98a7891496b68a5e598d0f647ebbef8162a541254ce41a9e55f","target":"graph","created_at":"2026-05-18T01:58:04Z","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":"Motivated by the question, which kind of physical interactions and processes are needed for the production of quantum entanglement, Peres has put forward the radical idea of delayed-choice entanglement swapping. There, entanglement can be \"produced a posteriori, after the entangled particles have been measured and may no longer exist\". In this work we report the first realization of Peres' gedanken experiment. Using four photons, we can actively delay the choice of measurement-implemented via a high-speed tunable bipartite state analyzer and a quantum random number generator-on two of the phot","authors_text":"Anton Zeilinger, Johannes Kofler, Rupert Ursin, Stefan Zotter, Thomas Jennewein, \\v{C}aslav Brukner, Xiao-song Ma","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-03-21T21:00:14Z","title":"Experimental delayed-choice entanglement swapping"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1203.4834","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":"sha256:82e5431898799f118b0b793b8cad788807fa6c7ad98f29202aaac7c66383c2c7","target":"record","created_at":"2026-05-18T01:58:04Z","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":"b445db31dc04c4f75af46c8b21d033752bdf6730101b77f84be9f1900acf6388","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-03-21T21:00:14Z","title_canon_sha256":"5a3b9f237492e5b046700a6d9b67f0af596cddfac5754e76941c2c51c40351ef"},"schema_version":"1.0","source":{"id":"1203.4834","kind":"arxiv","version":2}},"canonical_sha256":"43bc5243ee34833d6c85c1d1c20a3724043360edcacc6f6144bf639d4f7be5d1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"43bc5243ee34833d6c85c1d1c20a3724043360edcacc6f6144bf639d4f7be5d1","first_computed_at":"2026-05-18T01:58:04.826974Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:58:04.826974Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"LO5sc8asHnU4WkjI2JUA3Db+Y6hGTdqi3zWdvDID28UDNkmYhvlf5T78s0DIh05Z2VNuEv6PMKZQMIwYv32hDA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:58:04.827630Z","signed_message":"canonical_sha256_bytes"},"source_id":"1203.4834","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:82e5431898799f118b0b793b8cad788807fa6c7ad98f29202aaac7c66383c2c7","sha256:7936c805b68bb98a7891496b68a5e598d0f647ebbef8162a541254ce41a9e55f"],"state_sha256":"f2fe196a350a3e595138d6bc54d53e174cb9adf17a1b0600f5c66ad559f013d2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UIim1JQpPnBBaO7TxreGvQncnbg8t90evioKjnmIzSL6vAjFIZIe5pQhQC3KR71dCWrLb7emEVMJPggkukuCAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T19:23:13.683613Z","bundle_sha256":"ee3fbc3622f737fafe99efc517ef7d554b5d1dbf7f5ff5697bf821dda0ea1e4a"}}