{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:2SST22KKDDAIEQCV23LKITJLHZ","short_pith_number":"pith:2SST22KK","schema_version":"1.0","canonical_sha256":"d4a53d694a18c0824055d6d6a44d2b3e696b8308abbfa8cdb6bd39884f1072c5","source":{"kind":"arxiv","id":"1804.10543","version":2},"attestation_state":"computed","paper":{"title":"Quantum chaos and entanglement in ergodic and non-ergodic systems","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Angelo Piga, James Q. Quach, Maciej Lewenstein","submitted_at":"2018-04-27T14:54:32Z","abstract_excerpt":"We study entanglement entropy (EE) as a signature of quantum chaos in ergodic and non-ergodic systems. In particular we look at the quantum kicked top and kicked rotor as multi-qubit systems, and investigate the single qubit EE which characterizes bipartite entanglement of this qubit with the rest of the system. We study the correspondence of the Kolmogorov-Sinai entropy of the classical kicked systems with the EE of their quantum counterparts. We find that EE is a signature of global chaos in ergodic systems, and local chaos in non-ergodic systems. In particular, we show that EE can be maximi"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1804.10543","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2018-04-27T14:54:32Z","cross_cats_sorted":[],"title_canon_sha256":"5a7a7b21741c96727fc4115289752ee193698aafb4cdef9df8ae0bcd264d1a1d","abstract_canon_sha256":"e136fa75624e2775c491b48c9f0bccf4ac722d53568939c4dc8fe10658bc132b"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:50:13.759929Z","signature_b64":"QhZPQDFDcS5zd9ziMmz7jZz6S6+jZx3FzW793+BcIWjBdsTlE42qVr4Q5+2L4vIvKJ9lzFmjAcuR8hPClcfDDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d4a53d694a18c0824055d6d6a44d2b3e696b8308abbfa8cdb6bd39884f1072c5","last_reissued_at":"2026-05-17T23:50:13.759257Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:50:13.759257Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Quantum chaos and entanglement in ergodic and non-ergodic systems","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Angelo Piga, James Q. Quach, Maciej Lewenstein","submitted_at":"2018-04-27T14:54:32Z","abstract_excerpt":"We study entanglement entropy (EE) as a signature of quantum chaos in ergodic and non-ergodic systems. In particular we look at the quantum kicked top and kicked rotor as multi-qubit systems, and investigate the single qubit EE which characterizes bipartite entanglement of this qubit with the rest of the system. We study the correspondence of the Kolmogorov-Sinai entropy of the classical kicked systems with the EE of their quantum counterparts. We find that EE is a signature of global chaos in ergodic systems, and local chaos in non-ergodic systems. In particular, we show that EE can be maximi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.10543","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1804.10543","created_at":"2026-05-17T23:50:13.759359+00:00"},{"alias_kind":"arxiv_version","alias_value":"1804.10543v2","created_at":"2026-05-17T23:50:13.759359+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.10543","created_at":"2026-05-17T23:50:13.759359+00:00"},{"alias_kind":"pith_short_12","alias_value":"2SST22KKDDAI","created_at":"2026-05-18T12:32:02.567920+00:00"},{"alias_kind":"pith_short_16","alias_value":"2SST22KKDDAIEQCV","created_at":"2026-05-18T12:32:02.567920+00:00"},{"alias_kind":"pith_short_8","alias_value":"2SST22KK","created_at":"2026-05-18T12:32:02.567920+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/2SST22KKDDAIEQCV23LKITJLHZ","json":"https://pith.science/pith/2SST22KKDDAIEQCV23LKITJLHZ.json","graph_json":"https://pith.science/api/pith-number/2SST22KKDDAIEQCV23LKITJLHZ/graph.json","events_json":"https://pith.science/api/pith-number/2SST22KKDDAIEQCV23LKITJLHZ/events.json","paper":"https://pith.science/paper/2SST22KK"},"agent_actions":{"view_html":"https://pith.science/pith/2SST22KKDDAIEQCV23LKITJLHZ","download_json":"https://pith.science/pith/2SST22KKDDAIEQCV23LKITJLHZ.json","view_paper":"https://pith.science/paper/2SST22KK","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1804.10543&json=true","fetch_graph":"https://pith.science/api/pith-number/2SST22KKDDAIEQCV23LKITJLHZ/graph.json","fetch_events":"https://pith.science/api/pith-number/2SST22KKDDAIEQCV23LKITJLHZ/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/2SST22KKDDAIEQCV23LKITJLHZ/action/timestamp_anchor","attest_storage":"https://pith.science/pith/2SST22KKDDAIEQCV23LKITJLHZ/action/storage_attestation","attest_author":"https://pith.science/pith/2SST22KKDDAIEQCV23LKITJLHZ/action/author_attestation","sign_citation":"https://pith.science/pith/2SST22KKDDAIEQCV23LKITJLHZ/action/citation_signature","submit_replication":"https://pith.science/pith/2SST22KKDDAIEQCV23LKITJLHZ/action/replication_record"}},"created_at":"2026-05-17T23:50:13.759359+00:00","updated_at":"2026-05-17T23:50:13.759359+00:00"}