{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:7P45OFDW2B3FJPZP4OPKVEU2GA","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":"54f5b997bb464a29c2a586d6b50b3433fb8858f2f49513842e8042f342905da4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-12-15T18:21:32Z","title_canon_sha256":"e1023ba78d1f4da297ed978993d19318faef9c34b03e1238e8d93d37771cb862"},"schema_version":"1.0","source":{"id":"1212.3713","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1212.3713","created_at":"2026-05-18T01:52:37Z"},{"alias_kind":"arxiv_version","alias_value":"1212.3713v2","created_at":"2026-05-18T01:52:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1212.3713","created_at":"2026-05-18T01:52:37Z"},{"alias_kind":"pith_short_12","alias_value":"7P45OFDW2B3F","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_16","alias_value":"7P45OFDW2B3FJPZP","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_8","alias_value":"7P45OFDW","created_at":"2026-05-18T12:26:58Z"}],"graph_snapshots":[{"event_id":"sha256:53fefc52249bc41d8d339a45d458989bec33f3114cdaad0d4f83468fdca9150d","target":"graph","created_at":"2026-05-18T01:52:37Z","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":"Schroedinger's famous thought experiment involves a (macroscopic) cat whose quantum state becomes entangled with that of a (microscopic) decaying nucleus. The creation of such micro-macro entanglement is currently being pursued in several fields, including atomic ensembles, superconducting circuits, electro-mechanical and opto-mechanical systems. For purely optical systems, there have been several proposals to create micro-macro entanglement by greatly amplifying one half of an initial microscopic entangled state of light, but experimental attempts have so far been inconclusive. Here we experi","authors_text":"A. Chandra, A. I. Lvovsky, A. S. Prasad, C. Simon, R. Ghobadi","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-12-15T18:21:32Z","title":"Observation of micro-macro entanglement of light"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1212.3713","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:e69724770e57c15d28001dd1b8a0af5548d33c4cdbd4d43371bb46e7047a519a","target":"record","created_at":"2026-05-18T01:52:37Z","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":"54f5b997bb464a29c2a586d6b50b3433fb8858f2f49513842e8042f342905da4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-12-15T18:21:32Z","title_canon_sha256":"e1023ba78d1f4da297ed978993d19318faef9c34b03e1238e8d93d37771cb862"},"schema_version":"1.0","source":{"id":"1212.3713","kind":"arxiv","version":2}},"canonical_sha256":"fbf9d71476d07654bf2fe39eaa929a301ed0529df44eafb80bea3b1c1073866b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fbf9d71476d07654bf2fe39eaa929a301ed0529df44eafb80bea3b1c1073866b","first_computed_at":"2026-05-18T01:52:37.856135Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:52:37.856135Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"em5jeY9t3L8GNepP99+Jirs1hkpcbcqLxnrNm5I3ssPxfrsDBh/9Gy/maD2IfiyNI/xQ/HhfXpBdiJdC01fYCA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:52:37.856804Z","signed_message":"canonical_sha256_bytes"},"source_id":"1212.3713","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e69724770e57c15d28001dd1b8a0af5548d33c4cdbd4d43371bb46e7047a519a","sha256:53fefc52249bc41d8d339a45d458989bec33f3114cdaad0d4f83468fdca9150d"],"state_sha256":"4cadf370b0531000f78f8feec2e42cae9f922fbb636e377ba38e7d2b3cca0b56"}