{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:MUA2DKZHY75KJPSA4QMRTGWPBH","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":"e2148917d4843e991036b54b2012741cb82a4d7adfb5758f48beb8f3c8ff7a5a","cross_cats_sorted":["math-ph","math.MP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-09-19T10:56:29Z","title_canon_sha256":"19eda1727cef0b5db469d1add30b3424a928bdb2eca1aad67bcd91fb2a1c3650"},"schema_version":"1.0","source":{"id":"1409.5596","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1409.5596","created_at":"2026-05-18T02:42:26Z"},{"alias_kind":"arxiv_version","alias_value":"1409.5596v1","created_at":"2026-05-18T02:42:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1409.5596","created_at":"2026-05-18T02:42:26Z"},{"alias_kind":"pith_short_12","alias_value":"MUA2DKZHY75K","created_at":"2026-05-18T12:28:38Z"},{"alias_kind":"pith_short_16","alias_value":"MUA2DKZHY75KJPSA","created_at":"2026-05-18T12:28:38Z"},{"alias_kind":"pith_short_8","alias_value":"MUA2DKZH","created_at":"2026-05-18T12:28:38Z"}],"graph_snapshots":[{"event_id":"sha256:487e4187741d1f9868659a8cc9d857794c43624975ba8f0cd4ac5d2e4a1ee6fe","target":"graph","created_at":"2026-05-18T02:42:26Z","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 propose coherent (`Schr\\\"odinger catlike') states adapted to the parity symmetry providing a remarkable variational description of the ground and first excited states of vibron models for finite-($N$)-size molecules. Vibron models undergo a quantum shape phase transition (from linear to bent) at a critical value $\\xi_c$ of a control parameter. These trial cat states reveal a sudden increase of vibration-rotation entanglement linear ($L$) and von Neumann ($S$) entropies from zero to $L^{(N)}_{\\rm cat}(\\xi)\\simeq 1-{2}/{\\sqrt{\\pi N}}$ [to be compared with $L^{(N)}_{\\rm max.}(\\xi)=1-{1}/{(N+1)","authors_text":"E. Romera, M. Calixto, R. Del Real","cross_cats":["math-ph","math.MP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-09-19T10:56:29Z","title":"Parity-symmetry-adapted coherent states and entanglement in quantum phase transitions of vibron models"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1409.5596","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":"sha256:5bc1e7f783939aa111876c07d4745a3dd0cc1642355e502775fd05d01f772e37","target":"record","created_at":"2026-05-18T02:42:26Z","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":"e2148917d4843e991036b54b2012741cb82a4d7adfb5758f48beb8f3c8ff7a5a","cross_cats_sorted":["math-ph","math.MP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-09-19T10:56:29Z","title_canon_sha256":"19eda1727cef0b5db469d1add30b3424a928bdb2eca1aad67bcd91fb2a1c3650"},"schema_version":"1.0","source":{"id":"1409.5596","kind":"arxiv","version":1}},"canonical_sha256":"6501a1ab27c7faa4be40e419199acf09d13241e210cf577060d7ce31310d7538","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6501a1ab27c7faa4be40e419199acf09d13241e210cf577060d7ce31310d7538","first_computed_at":"2026-05-18T02:42:26.891563Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:42:26.891563Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HDVyTFWAdkqOyaz310cAMThTwXOLrAK9IJQq+rQ7lOa1G0nTxfSKSUlOiAzcHVRFp8lq3TgO4HWCyx6tiehiBA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:42:26.892473Z","signed_message":"canonical_sha256_bytes"},"source_id":"1409.5596","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5bc1e7f783939aa111876c07d4745a3dd0cc1642355e502775fd05d01f772e37","sha256:487e4187741d1f9868659a8cc9d857794c43624975ba8f0cd4ac5d2e4a1ee6fe"],"state_sha256":"ff2f776f0f18425b14a0d18315555a8c4abcb28ded7b1c1c96364eaaf502e283"}