{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2005:UGFAPQ23Z6PR2XXAZC2E53K4N2","short_pith_number":"pith:UGFAPQ23","schema_version":"1.0","canonical_sha256":"a18a07c35bcf9f1d5ee0c8b44eed5c6e8fe83388e5e94d2f66e21a53bafda322","source":{"kind":"arxiv","id":"quant-ph/0508235","version":1},"attestation_state":"computed","paper":{"title":"Local uncertainty relations serving as measures of entanglement in a bipartite two-level system","license":"","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Gunnar Bj\\\"ork, Simon Samuelsson","submitted_at":"2005-08-31T10:04:54Z","abstract_excerpt":"We comment on the recent suggestion to use a family of local uncertainty relations as a standard way of quantifying entanglement in two-qubit systems. Some statements made on the applicability of the proposed \"measures\" are overly optimistic. We exemplify how these specific \"measures\" fall short, and present a minor modification of the general theory which uses the same experimentally gathered information, but in a slightly different, better way."},"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":"quant-ph/0508235","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"quant-ph","submitted_at":"2005-08-31T10:04:54Z","cross_cats_sorted":[],"title_canon_sha256":"3b1dedcd5781d841945868470fcf5e98f2e931d77d26bf676fd1d6f46bf8b548","abstract_canon_sha256":"3fcd90cb128817b8be671d6c1c9427d79120fccdebd65daf61173e7c2e99705b"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:08:45.601983Z","signature_b64":"0XYho3AVXHZphVtoU4lORMsssi+5X1ThPon0Qympa5oewfxWk1jwxttmMQK4z7xffz4xTG2kWmyyVLn2KfmYCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a18a07c35bcf9f1d5ee0c8b44eed5c6e8fe83388e5e94d2f66e21a53bafda322","last_reissued_at":"2026-05-18T01:08:45.601602Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:08:45.601602Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Local uncertainty relations serving as measures of entanglement in a bipartite two-level system","license":"","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Gunnar Bj\\\"ork, Simon Samuelsson","submitted_at":"2005-08-31T10:04:54Z","abstract_excerpt":"We comment on the recent suggestion to use a family of local uncertainty relations as a standard way of quantifying entanglement in two-qubit systems. Some statements made on the applicability of the proposed \"measures\" are overly optimistic. We exemplify how these specific \"measures\" fall short, and present a minor modification of the general theory which uses the same experimentally gathered information, but in a slightly different, better way."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"quant-ph/0508235","kind":"arxiv","version":1},"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":"quant-ph/0508235","created_at":"2026-05-18T01:08:45.601667+00:00"},{"alias_kind":"arxiv_version","alias_value":"quant-ph/0508235v1","created_at":"2026-05-18T01:08:45.601667+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.quant-ph/0508235","created_at":"2026-05-18T01:08:45.601667+00:00"},{"alias_kind":"pith_short_12","alias_value":"UGFAPQ23Z6PR","created_at":"2026-05-18T12:25:53.939244+00:00"},{"alias_kind":"pith_short_16","alias_value":"UGFAPQ23Z6PR2XXA","created_at":"2026-05-18T12:25:53.939244+00:00"},{"alias_kind":"pith_short_8","alias_value":"UGFAPQ23","created_at":"2026-05-18T12:25:53.939244+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/UGFAPQ23Z6PR2XXAZC2E53K4N2","json":"https://pith.science/pith/UGFAPQ23Z6PR2XXAZC2E53K4N2.json","graph_json":"https://pith.science/api/pith-number/UGFAPQ23Z6PR2XXAZC2E53K4N2/graph.json","events_json":"https://pith.science/api/pith-number/UGFAPQ23Z6PR2XXAZC2E53K4N2/events.json","paper":"https://pith.science/paper/UGFAPQ23"},"agent_actions":{"view_html":"https://pith.science/pith/UGFAPQ23Z6PR2XXAZC2E53K4N2","download_json":"https://pith.science/pith/UGFAPQ23Z6PR2XXAZC2E53K4N2.json","view_paper":"https://pith.science/paper/UGFAPQ23","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=quant-ph/0508235&json=true","fetch_graph":"https://pith.science/api/pith-number/UGFAPQ23Z6PR2XXAZC2E53K4N2/graph.json","fetch_events":"https://pith.science/api/pith-number/UGFAPQ23Z6PR2XXAZC2E53K4N2/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/UGFAPQ23Z6PR2XXAZC2E53K4N2/action/timestamp_anchor","attest_storage":"https://pith.science/pith/UGFAPQ23Z6PR2XXAZC2E53K4N2/action/storage_attestation","attest_author":"https://pith.science/pith/UGFAPQ23Z6PR2XXAZC2E53K4N2/action/author_attestation","sign_citation":"https://pith.science/pith/UGFAPQ23Z6PR2XXAZC2E53K4N2/action/citation_signature","submit_replication":"https://pith.science/pith/UGFAPQ23Z6PR2XXAZC2E53K4N2/action/replication_record"}},"created_at":"2026-05-18T01:08:45.601667+00:00","updated_at":"2026-05-18T01:08:45.601667+00:00"}