{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:T7GDWSHH3OBSKBBOZMG7EOPHZV","short_pith_number":"pith:T7GDWSHH","canonical_record":{"source":{"id":"1110.6406","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2011-10-28T17:24:50Z","cross_cats_sorted":["cond-mat.other"],"title_canon_sha256":"3e86c0306513ad39ad5659372b55c120d5a0ef4f7204189661902eaaba1224fd","abstract_canon_sha256":"082586daf135d760b60817321e57b62d45819ed56fac37f770bfe5267f7c2a54"},"schema_version":"1.0"},"canonical_sha256":"9fcc3b48e7db8325042ecb0df239e7cd798a59e99b26489cddecf2a1be5a5a49","source":{"kind":"arxiv","id":"1110.6406","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1110.6406","created_at":"2026-05-18T03:53:20Z"},{"alias_kind":"arxiv_version","alias_value":"1110.6406v2","created_at":"2026-05-18T03:53:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1110.6406","created_at":"2026-05-18T03:53:20Z"},{"alias_kind":"pith_short_12","alias_value":"T7GDWSHH3OBS","created_at":"2026-05-18T12:26:41Z"},{"alias_kind":"pith_short_16","alias_value":"T7GDWSHH3OBSKBBO","created_at":"2026-05-18T12:26:41Z"},{"alias_kind":"pith_short_8","alias_value":"T7GDWSHH","created_at":"2026-05-18T12:26:41Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:T7GDWSHH3OBSKBBOZMG7EOPHZV","target":"record","payload":{"canonical_record":{"source":{"id":"1110.6406","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2011-10-28T17:24:50Z","cross_cats_sorted":["cond-mat.other"],"title_canon_sha256":"3e86c0306513ad39ad5659372b55c120d5a0ef4f7204189661902eaaba1224fd","abstract_canon_sha256":"082586daf135d760b60817321e57b62d45819ed56fac37f770bfe5267f7c2a54"},"schema_version":"1.0"},"canonical_sha256":"9fcc3b48e7db8325042ecb0df239e7cd798a59e99b26489cddecf2a1be5a5a49","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:53:20.204468Z","signature_b64":"yURHHZU+XiQiVs70M6YJK5lmBdriar0/5Dx49wE8BIqTHrgSxj9G41r/8IXRK+vrXfFXAaJCp+J0W4OlFrxMAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9fcc3b48e7db8325042ecb0df239e7cd798a59e99b26489cddecf2a1be5a5a49","last_reissued_at":"2026-05-18T03:53:20.203820Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:53:20.203820Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1110.6406","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":"2026-05-18T03:53:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BcakFFANYOcPWiOvZkKzhqbLOoEuMH9ILWLaub8QiCCl6BSo3FTYHmLpXW/XLNwOiBBUJskTgnt/PUbgajURAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-25T19:13:53.997376Z"},"content_sha256":"531364b31af45951933f67754cb549a923060fa79fba51529ca56a74ef45ecef","schema_version":"1.0","event_id":"sha256:531364b31af45951933f67754cb549a923060fa79fba51529ca56a74ef45ecef"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:T7GDWSHH3OBSKBBOZMG7EOPHZV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Thermal Entanglement of a Spin-1/2 Ising-Heisenberg Model on a Symmetrical Diamond Chain","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.other"],"primary_cat":"cond-mat.str-el","authors_text":"L. A. Chakhmakhchyan, L. N. Ananikyan, N. S. Ananikian, Onofre Rojas","submitted_at":"2011-10-28T17:24:50Z","abstract_excerpt":"The entanglement quantum properties of a spin-1/2 Ising-Heisenberg model on a symmetrical diamond chain were analyzed. Due to the separable nature of the Ising-type exchange interactions between neighboring Heisenberg dimers, calculation of the entanglement can be performed exactly for each individual dimer. Pairwise thermal entanglement was studied in terms of the isotropic Ising-Heisenberg model, and analytical expressions for the concurrence (as a measure of bipartite entanglement) were obtained. The effects of external magnetic field $H$ and next-nearest neighbor interaction $J_m$ between "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1110.6406","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":"2026-05-18T03:53:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2fm/HNfRekH4Xh27NZ2pY/nZgMYxuWIyvoGbQWI9K3J8t6LoB7pD7c7FzpdJdCMsJXogzLFwJU92aVjdfbzRAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-25T19:13:53.997720Z"},"content_sha256":"cdcd0f7de35c3f74f6e7f7cc88c93bdebee8e9cc28aa95b16f5189a9cef65871","schema_version":"1.0","event_id":"sha256:cdcd0f7de35c3f74f6e7f7cc88c93bdebee8e9cc28aa95b16f5189a9cef65871"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/T7GDWSHH3OBSKBBOZMG7EOPHZV/bundle.json","state_url":"https://pith.science/pith/T7GDWSHH3OBSKBBOZMG7EOPHZV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/T7GDWSHH3OBSKBBOZMG7EOPHZV/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":"2026-06-25T19:13:53Z","links":{"resolver":"https://pith.science/pith/T7GDWSHH3OBSKBBOZMG7EOPHZV","bundle":"https://pith.science/pith/T7GDWSHH3OBSKBBOZMG7EOPHZV/bundle.json","state":"https://pith.science/pith/T7GDWSHH3OBSKBBOZMG7EOPHZV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/T7GDWSHH3OBSKBBOZMG7EOPHZV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:T7GDWSHH3OBSKBBOZMG7EOPHZV","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":"082586daf135d760b60817321e57b62d45819ed56fac37f770bfe5267f7c2a54","cross_cats_sorted":["cond-mat.other"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2011-10-28T17:24:50Z","title_canon_sha256":"3e86c0306513ad39ad5659372b55c120d5a0ef4f7204189661902eaaba1224fd"},"schema_version":"1.0","source":{"id":"1110.6406","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1110.6406","created_at":"2026-05-18T03:53:20Z"},{"alias_kind":"arxiv_version","alias_value":"1110.6406v2","created_at":"2026-05-18T03:53:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1110.6406","created_at":"2026-05-18T03:53:20Z"},{"alias_kind":"pith_short_12","alias_value":"T7GDWSHH3OBS","created_at":"2026-05-18T12:26:41Z"},{"alias_kind":"pith_short_16","alias_value":"T7GDWSHH3OBSKBBO","created_at":"2026-05-18T12:26:41Z"},{"alias_kind":"pith_short_8","alias_value":"T7GDWSHH","created_at":"2026-05-18T12:26:41Z"}],"graph_snapshots":[{"event_id":"sha256:cdcd0f7de35c3f74f6e7f7cc88c93bdebee8e9cc28aa95b16f5189a9cef65871","target":"graph","created_at":"2026-05-18T03:53:20Z","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 entanglement quantum properties of a spin-1/2 Ising-Heisenberg model on a symmetrical diamond chain were analyzed. Due to the separable nature of the Ising-type exchange interactions between neighboring Heisenberg dimers, calculation of the entanglement can be performed exactly for each individual dimer. Pairwise thermal entanglement was studied in terms of the isotropic Ising-Heisenberg model, and analytical expressions for the concurrence (as a measure of bipartite entanglement) were obtained. The effects of external magnetic field $H$ and next-nearest neighbor interaction $J_m$ between ","authors_text":"L. A. Chakhmakhchyan, L. N. Ananikyan, N. S. Ananikian, Onofre Rojas","cross_cats":["cond-mat.other"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2011-10-28T17:24:50Z","title":"Thermal Entanglement of a Spin-1/2 Ising-Heisenberg Model on a Symmetrical Diamond Chain"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1110.6406","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":"sha256:531364b31af45951933f67754cb549a923060fa79fba51529ca56a74ef45ecef","target":"record","created_at":"2026-05-18T03:53:20Z","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":"082586daf135d760b60817321e57b62d45819ed56fac37f770bfe5267f7c2a54","cross_cats_sorted":["cond-mat.other"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2011-10-28T17:24:50Z","title_canon_sha256":"3e86c0306513ad39ad5659372b55c120d5a0ef4f7204189661902eaaba1224fd"},"schema_version":"1.0","source":{"id":"1110.6406","kind":"arxiv","version":2}},"canonical_sha256":"9fcc3b48e7db8325042ecb0df239e7cd798a59e99b26489cddecf2a1be5a5a49","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9fcc3b48e7db8325042ecb0df239e7cd798a59e99b26489cddecf2a1be5a5a49","first_computed_at":"2026-05-18T03:53:20.203820Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:53:20.203820Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"yURHHZU+XiQiVs70M6YJK5lmBdriar0/5Dx49wE8BIqTHrgSxj9G41r/8IXRK+vrXfFXAaJCp+J0W4OlFrxMAA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:53:20.204468Z","signed_message":"canonical_sha256_bytes"},"source_id":"1110.6406","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:531364b31af45951933f67754cb549a923060fa79fba51529ca56a74ef45ecef","sha256:cdcd0f7de35c3f74f6e7f7cc88c93bdebee8e9cc28aa95b16f5189a9cef65871"],"state_sha256":"1787db90b4be7eb2c9ff99837620e15c056d7210b7ad67e2b04ed61387464807"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yxhZbWbCK6EIrwNeAKH2CgSdxcGLY5hSzCCTaGCK1CUnucmwvUbUyZNGoyXKgzyQu/Rp6dVwFpGTLAGBvN7LCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-25T19:13:53.999699Z","bundle_sha256":"f689810f9fd74b58b8ad93e729e32973d9c0c9a38d80d426a1098cca4dd142f0"}}