{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:I3EFW73V7FJNLE337M325VYUDY","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":"ee203d0b607328c85eac32e18e6693aaf58caaf4b6829e16e4a00d898b82f7c0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2008-03-13T13:40:06Z","title_canon_sha256":"3ede6ed7f2b2345ee900e72323eff6f01cadc265e3120b5e5c66912cfec558cc"},"schema_version":"1.0","source":{"id":"0803.1965","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0803.1965","created_at":"2026-05-18T00:10:14Z"},{"alias_kind":"arxiv_version","alias_value":"0803.1965v1","created_at":"2026-05-18T00:10:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0803.1965","created_at":"2026-05-18T00:10:14Z"},{"alias_kind":"pith_short_12","alias_value":"I3EFW73V7FJN","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_16","alias_value":"I3EFW73V7FJNLE33","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_8","alias_value":"I3EFW73V","created_at":"2026-05-18T12:25:57Z"}],"graph_snapshots":[{"event_id":"sha256:83861a384d5c31985950127cbe4aaa0e72f68956366086d7c43c47d7b387092d","target":"graph","created_at":"2026-05-18T00:10:14Z","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":"Repeated observations of a quantum system interacting with another one can drive the latter toward a particular quantum state, irrespectively of its initial condition, because of an {\\em effective non-unitary evolution}. If the target state is a pure one, the degree of purity of the system approaches unity, even when the initial condition of the system is a mixed state. In this paper we study the behavior of the purity from the initial value to the final one, that is unity. Depending on the parameters, after a finite number of measurements, the purity exhibits oscillations, that brings about a","authors_text":"A. Messina, B. Militello, H. Nakazato, K. Yuasa","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2008-03-13T13:40:06Z","title":"Oscillations of the purity in the repeated-measurement-based generation of quantum states"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0803.1965","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:cb5af36f723bf2b36a98054f246ee87e8ab54bab7719614b24bc5e9e8fb95988","target":"record","created_at":"2026-05-18T00:10:14Z","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":"ee203d0b607328c85eac32e18e6693aaf58caaf4b6829e16e4a00d898b82f7c0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2008-03-13T13:40:06Z","title_canon_sha256":"3ede6ed7f2b2345ee900e72323eff6f01cadc265e3120b5e5c66912cfec558cc"},"schema_version":"1.0","source":{"id":"0803.1965","kind":"arxiv","version":1}},"canonical_sha256":"46c85b7f75f952d5937bfb37aed7141e00752341d76add319e6b8402d3191d53","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"46c85b7f75f952d5937bfb37aed7141e00752341d76add319e6b8402d3191d53","first_computed_at":"2026-05-18T00:10:14.455969Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:10:14.455969Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"baQKq1QcysoZR1udjDlDt3xD37lszVWdUu5jYWFA0TsdWYxnDF1pnq44zBI+JvMBiQMTtF4zF7pICQyhUhyACA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:10:14.456643Z","signed_message":"canonical_sha256_bytes"},"source_id":"0803.1965","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cb5af36f723bf2b36a98054f246ee87e8ab54bab7719614b24bc5e9e8fb95988","sha256:83861a384d5c31985950127cbe4aaa0e72f68956366086d7c43c47d7b387092d"],"state_sha256":"c88aaa61c4de4d21bf3256f3496e74968ff6ca02d7d8e40a01a16708aed244c0"}