{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:DAZY5URCAYYPV2YYWLHVATVX55","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":"ca1b33bf11384e3c11a0e317311ed146e66a012db7a5e72d763533b1eb811851","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-02-21T09:58:16Z","title_canon_sha256":"a9b31534484be8c7fea315d130fbf51f7101387e3561c60eb2ddd6afd77abec8"},"schema_version":"1.0","source":{"id":"1302.5232","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1302.5232","created_at":"2026-05-18T01:51:34Z"},{"alias_kind":"arxiv_version","alias_value":"1302.5232v1","created_at":"2026-05-18T01:51:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1302.5232","created_at":"2026-05-18T01:51:34Z"},{"alias_kind":"pith_short_12","alias_value":"DAZY5URCAYYP","created_at":"2026-05-18T12:27:40Z"},{"alias_kind":"pith_short_16","alias_value":"DAZY5URCAYYPV2YY","created_at":"2026-05-18T12:27:40Z"},{"alias_kind":"pith_short_8","alias_value":"DAZY5URC","created_at":"2026-05-18T12:27:40Z"}],"graph_snapshots":[{"event_id":"sha256:f09a0494321defa8c95d5ee13002125983702e0c03ba42d568ea5ca85d42e2a9","target":"graph","created_at":"2026-05-18T01:51:34Z","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":"An isolated spin system that is in internal thermodynamic equilibrium and that has an upper limit to its allowed energy states can possess a negative temperature. We calculate the thermodynamic characteristics and the concurrence in this system over the entire range of positive and negative temperatures. Our calculation was performed for different real structures, which can be used in experiments. It is found that the temperature dependence of the concurrence is substantially asymmetrical similarly other thermodynamic characteristics. At a negative temperature the maximum concurrence and the a","authors_text":"G.B. Furman, V.L. Sokolovsky, V. M. Meerovich","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-02-21T09:58:16Z","title":"Quantum entanglement at negative temperature"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1302.5232","kind":"arxiv","version":1},"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":"sha256:552763961e0afe357e65457b5c4081f5ac6120322b15e65145baa0462d16997a","target":"record","created_at":"2026-05-18T01:51:34Z","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":"ca1b33bf11384e3c11a0e317311ed146e66a012db7a5e72d763533b1eb811851","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-02-21T09:58:16Z","title_canon_sha256":"a9b31534484be8c7fea315d130fbf51f7101387e3561c60eb2ddd6afd77abec8"},"schema_version":"1.0","source":{"id":"1302.5232","kind":"arxiv","version":1}},"canonical_sha256":"18338ed2220630faeb18b2cf504eb7ef6f3c251d995702f0dff030ecba4e3cff","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"18338ed2220630faeb18b2cf504eb7ef6f3c251d995702f0dff030ecba4e3cff","first_computed_at":"2026-05-18T01:51:34.570921Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:51:34.570921Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"nEGaZf1zruDKi3/NFO9JwidSAQ5pcUGH+DMipNx6HaZEEoZ6UruDXupxTN7Y6dSSKWEws2EeaLP2vRscYZKiAA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:51:34.571413Z","signed_message":"canonical_sha256_bytes"},"source_id":"1302.5232","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:552763961e0afe357e65457b5c4081f5ac6120322b15e65145baa0462d16997a","sha256:f09a0494321defa8c95d5ee13002125983702e0c03ba42d568ea5ca85d42e2a9"],"state_sha256":"b055c72e55c9798dd9d200de3d56379508e62a3c6c59c79ce864f6c9c4125232"}