{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:XKONUD257ZTOM7GG4X5AXBPPA6","short_pith_number":"pith:XKONUD25","canonical_record":{"source":{"id":"1208.5459","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-08-27T18:03:52Z","cross_cats_sorted":[],"title_canon_sha256":"93f47dad9454bae7dd5fdc981e13e3a11f3409381f20b3835392c824627be258","abstract_canon_sha256":"38e6811218005a48c5beda9b6bfbf358855a6d1353815bca2d4c55631bbfd9df"},"schema_version":"1.0"},"canonical_sha256":"ba9cda0f5dfe66e67cc6e5fa0b85ef079f279bbdccfdd38f6c481adb6a54e48e","source":{"kind":"arxiv","id":"1208.5459","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1208.5459","created_at":"2026-05-18T03:38:57Z"},{"alias_kind":"arxiv_version","alias_value":"1208.5459v2","created_at":"2026-05-18T03:38:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1208.5459","created_at":"2026-05-18T03:38:57Z"},{"alias_kind":"pith_short_12","alias_value":"XKONUD257ZTO","created_at":"2026-05-18T12:27:27Z"},{"alias_kind":"pith_short_16","alias_value":"XKONUD257ZTOM7GG","created_at":"2026-05-18T12:27:27Z"},{"alias_kind":"pith_short_8","alias_value":"XKONUD25","created_at":"2026-05-18T12:27:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:XKONUD257ZTOM7GG4X5AXBPPA6","target":"record","payload":{"canonical_record":{"source":{"id":"1208.5459","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-08-27T18:03:52Z","cross_cats_sorted":[],"title_canon_sha256":"93f47dad9454bae7dd5fdc981e13e3a11f3409381f20b3835392c824627be258","abstract_canon_sha256":"38e6811218005a48c5beda9b6bfbf358855a6d1353815bca2d4c55631bbfd9df"},"schema_version":"1.0"},"canonical_sha256":"ba9cda0f5dfe66e67cc6e5fa0b85ef079f279bbdccfdd38f6c481adb6a54e48e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:38:57.385135Z","signature_b64":"RbKQaaEZDKpIABXgV5eMv+tmB3RLMmVbyEhWgIOvJn71c3UUbM4AFYV2+XIfz68UU4jagir7gNur2XHiSjZEAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ba9cda0f5dfe66e67cc6e5fa0b85ef079f279bbdccfdd38f6c481adb6a54e48e","last_reissued_at":"2026-05-18T03:38:57.384569Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:38:57.384569Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1208.5459","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":"2026-05-18T03:38:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nZuPZBSQXCpoqYaVUlQugQvN8+7NhBBDiL1LkSdZg//H0driII/M0+w8sovfSS6AHkU+WHcFDhlM2XtkD/GnAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T20:31:38.726038Z"},"content_sha256":"3ca1fe34090a820bde501e67bae93f733bbf6085c637669d156b453608ec060b","schema_version":"1.0","event_id":"sha256:3ca1fe34090a820bde501e67bae93f733bbf6085c637669d156b453608ec060b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:XKONUD257ZTOM7GG4X5AXBPPA6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Evidence for entanglement at high temperatures in an engineered molecular magnet","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"A. M. dos Santos, B. C. Sales, D. O. Soares-Pinto, M. S. Reis, P. Brandao, S. Soriano","submitted_at":"2012-08-27T18:03:52Z","abstract_excerpt":"The molecular compound [Fe$_{2}$($\\mu_{2}$-oxo)(C$_{3}$H$_{4}$N$_{2}$)$_{6}$(C$_{2}$O$_{4}$)$_{2}$] was designed and synthesized for the first time and its structure was determined using single-crystal X-ray diffraction. The magnetic susceptibility of this compound was measured from 2 to 300 K. The analysis of the susceptibility data using protocols developed for other spin singlet ground-state systems indicates that the quantum entanglement would remain at temperatures up to 732 K, significantly above the highest entanglement temperature reported to date. The large gap between the ground stat"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1208.5459","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":"2026-05-18T03:38:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Hce9xOdqg7lhixKGiIZS3UTHTwkuFMWOo6Ktr3DzOgARvAtUbGx8QZ3a5KEklB3slg39A50rQlSsU3je4y3RBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T20:31:38.726408Z"},"content_sha256":"85a3b61b3f073e8d0839ffa7053123aa9007f3bdd9ed6af767a913fe6a26f956","schema_version":"1.0","event_id":"sha256:85a3b61b3f073e8d0839ffa7053123aa9007f3bdd9ed6af767a913fe6a26f956"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XKONUD257ZTOM7GG4X5AXBPPA6/bundle.json","state_url":"https://pith.science/pith/XKONUD257ZTOM7GG4X5AXBPPA6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XKONUD257ZTOM7GG4X5AXBPPA6/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":"2026-05-29T20:31:38Z","links":{"resolver":"https://pith.science/pith/XKONUD257ZTOM7GG4X5AXBPPA6","bundle":"https://pith.science/pith/XKONUD257ZTOM7GG4X5AXBPPA6/bundle.json","state":"https://pith.science/pith/XKONUD257ZTOM7GG4X5AXBPPA6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XKONUD257ZTOM7GG4X5AXBPPA6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:XKONUD257ZTOM7GG4X5AXBPPA6","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":"38e6811218005a48c5beda9b6bfbf358855a6d1353815bca2d4c55631bbfd9df","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-08-27T18:03:52Z","title_canon_sha256":"93f47dad9454bae7dd5fdc981e13e3a11f3409381f20b3835392c824627be258"},"schema_version":"1.0","source":{"id":"1208.5459","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1208.5459","created_at":"2026-05-18T03:38:57Z"},{"alias_kind":"arxiv_version","alias_value":"1208.5459v2","created_at":"2026-05-18T03:38:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1208.5459","created_at":"2026-05-18T03:38:57Z"},{"alias_kind":"pith_short_12","alias_value":"XKONUD257ZTO","created_at":"2026-05-18T12:27:27Z"},{"alias_kind":"pith_short_16","alias_value":"XKONUD257ZTOM7GG","created_at":"2026-05-18T12:27:27Z"},{"alias_kind":"pith_short_8","alias_value":"XKONUD25","created_at":"2026-05-18T12:27:27Z"}],"graph_snapshots":[{"event_id":"sha256:85a3b61b3f073e8d0839ffa7053123aa9007f3bdd9ed6af767a913fe6a26f956","target":"graph","created_at":"2026-05-18T03:38:57Z","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 molecular compound [Fe$_{2}$($\\mu_{2}$-oxo)(C$_{3}$H$_{4}$N$_{2}$)$_{6}$(C$_{2}$O$_{4}$)$_{2}$] was designed and synthesized for the first time and its structure was determined using single-crystal X-ray diffraction. The magnetic susceptibility of this compound was measured from 2 to 300 K. The analysis of the susceptibility data using protocols developed for other spin singlet ground-state systems indicates that the quantum entanglement would remain at temperatures up to 732 K, significantly above the highest entanglement temperature reported to date. The large gap between the ground stat","authors_text":"A. M. dos Santos, B. C. Sales, D. O. Soares-Pinto, M. S. Reis, P. Brandao, S. Soriano","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-08-27T18:03:52Z","title":"Evidence for entanglement at high temperatures in an engineered molecular magnet"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1208.5459","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":"sha256:3ca1fe34090a820bde501e67bae93f733bbf6085c637669d156b453608ec060b","target":"record","created_at":"2026-05-18T03:38:57Z","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":"38e6811218005a48c5beda9b6bfbf358855a6d1353815bca2d4c55631bbfd9df","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-08-27T18:03:52Z","title_canon_sha256":"93f47dad9454bae7dd5fdc981e13e3a11f3409381f20b3835392c824627be258"},"schema_version":"1.0","source":{"id":"1208.5459","kind":"arxiv","version":2}},"canonical_sha256":"ba9cda0f5dfe66e67cc6e5fa0b85ef079f279bbdccfdd38f6c481adb6a54e48e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ba9cda0f5dfe66e67cc6e5fa0b85ef079f279bbdccfdd38f6c481adb6a54e48e","first_computed_at":"2026-05-18T03:38:57.384569Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:38:57.384569Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"RbKQaaEZDKpIABXgV5eMv+tmB3RLMmVbyEhWgIOvJn71c3UUbM4AFYV2+XIfz68UU4jagir7gNur2XHiSjZEAw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:38:57.385135Z","signed_message":"canonical_sha256_bytes"},"source_id":"1208.5459","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3ca1fe34090a820bde501e67bae93f733bbf6085c637669d156b453608ec060b","sha256:85a3b61b3f073e8d0839ffa7053123aa9007f3bdd9ed6af767a913fe6a26f956"],"state_sha256":"978edf95a0249e61e5e21abcb43edeb1ed752c22bb428748cafc3c645c66729c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Frt9SiqDvZ9ws3IayvpOu8RLNQB41Zh9+ckvDo0YdkAhx80Ozg0NoOlzJTHdUgXnMK5fWpH6Xs5vHTIO99VGAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-29T20:31:38.728729Z","bundle_sha256":"c9336a41a7485db8d8a0c45b0fe61500fcab34f8525dd8f762757ea902961dcd"}}