{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:22FJWW2JNCFCYPOPKM4Z5WGKAZ","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":"c3d4a62fc1a5f38f17dec35d7df7bcfb49d932ec2b0bb711cd96b3589461d8a5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-09-09T12:14:46Z","title_canon_sha256":"4805ce39a1d5cd18b105658a96493dcd35acdb85c26818eb7d9477fc76504bd6"},"schema_version":"1.0","source":{"id":"1609.02758","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1609.02758","created_at":"2026-05-18T00:43:02Z"},{"alias_kind":"arxiv_version","alias_value":"1609.02758v2","created_at":"2026-05-18T00:43:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1609.02758","created_at":"2026-05-18T00:43:02Z"},{"alias_kind":"pith_short_12","alias_value":"22FJWW2JNCFC","created_at":"2026-05-18T12:29:52Z"},{"alias_kind":"pith_short_16","alias_value":"22FJWW2JNCFCYPOP","created_at":"2026-05-18T12:29:52Z"},{"alias_kind":"pith_short_8","alias_value":"22FJWW2J","created_at":"2026-05-18T12:29:52Z"}],"graph_snapshots":[{"event_id":"sha256:561d2e66c1e50c78b1e86654ddb6a8d4f6b050d0c3e0906a35b4a684a2c87dd6","target":"graph","created_at":"2026-05-18T00:43:02Z","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":"We study a simple model describing superradiance in a system of two-level atoms interacting with a single-mode bosonic field. The model permits a continuous crossover between integrable and partially chaotic regimes and shows a complex thermodynamic and quantum phase structure. Several types of excited-state quantum phase transitions separate quantum phases that are characterized by specific energy dependences of various observables and by different atom-field and atom-atom entanglement properties. We observe an approximate revival of some states from the weak atom-field coupling limit in the ","authors_text":"Michal Kloc, Pavel Cejnar, Pavel Stransky","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-09-09T12:14:46Z","title":"Quantum phases and entanglement properties of an extended Dicke model"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1609.02758","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:f082802d256f50a94908a69a84353288630454147f59f7dc4d8fbf5a3b28e4da","target":"record","created_at":"2026-05-18T00:43:02Z","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":"c3d4a62fc1a5f38f17dec35d7df7bcfb49d932ec2b0bb711cd96b3589461d8a5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-09-09T12:14:46Z","title_canon_sha256":"4805ce39a1d5cd18b105658a96493dcd35acdb85c26818eb7d9477fc76504bd6"},"schema_version":"1.0","source":{"id":"1609.02758","kind":"arxiv","version":2}},"canonical_sha256":"d68a9b5b49688a2c3dcf53399ed8ca0674700cf081fcdded693d80165c7e027c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d68a9b5b49688a2c3dcf53399ed8ca0674700cf081fcdded693d80165c7e027c","first_computed_at":"2026-05-18T00:43:02.294540Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:43:02.294540Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"nxNDkdkntXjBsOIccULawfpNv1wjeh++fQ5t4+CTImW14DTwEuul33KEYOLyjPhqDdKLEQwb4bzX6dFxDKw7CA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:43:02.295209Z","signed_message":"canonical_sha256_bytes"},"source_id":"1609.02758","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f082802d256f50a94908a69a84353288630454147f59f7dc4d8fbf5a3b28e4da","sha256:561d2e66c1e50c78b1e86654ddb6a8d4f6b050d0c3e0906a35b4a684a2c87dd6"],"state_sha256":"228c4630ac65c842a65babb1d9e8fe481159aec319d29f19ad559082a33a3e52"}