{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2009:IEKKIM7GGMEE2AOEHBMJVJSJFN","short_pith_number":"pith:IEKKIM7G","schema_version":"1.0","canonical_sha256":"4114a433e633084d01c438589aa6492b459be06addb0697d64162a836d3f858d","source":{"kind":"arxiv","id":"0909.2743","version":1},"attestation_state":"computed","paper":{"title":"Experimental generation of pseudo bound entanglement","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"D. Bruss, D. Suter, H. Kampermann, X. Peng","submitted_at":"2009-09-15T08:30:35Z","abstract_excerpt":"We use Nuclear Magnetic Resonance (NMR) to experimentally generate a bound entangled (more precisely: pseudo bound entangled) state, i.e. a quantum state which is non-distillable but nevertheless entangled. Our quantum system consists of three qubits. We characterize the produced state via state tomography to show that the created state has a positive partial transposition with respect to any bipartite splitting, and we use a witness operator to prove its entanglement."},"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":"0909.2743","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-09-15T08:30:35Z","cross_cats_sorted":[],"title_canon_sha256":"ee00d26a091e5d86b03a910094fe073f041e1a98fb44f352ee41debc1d9b0725","abstract_canon_sha256":"0e08d7c2913441ba7b3efbb848e6006fd6f9b9a1004c2fd8c1451d54d8cd7222"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:36:59.401836Z","signature_b64":"qarV8IO4Y1teGCYuQlKb/0Pru17z7ozsx7YbiuxE/t2VmzyyNvJ7tqthEuKUpG5pea73XdMFVvfkZKJsHplbAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4114a433e633084d01c438589aa6492b459be06addb0697d64162a836d3f858d","last_reissued_at":"2026-05-18T04:36:59.401235Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:36:59.401235Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Experimental generation of pseudo bound entanglement","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"D. Bruss, D. Suter, H. Kampermann, X. Peng","submitted_at":"2009-09-15T08:30:35Z","abstract_excerpt":"We use Nuclear Magnetic Resonance (NMR) to experimentally generate a bound entangled (more precisely: pseudo bound entangled) state, i.e. a quantum state which is non-distillable but nevertheless entangled. Our quantum system consists of three qubits. We characterize the produced state via state tomography to show that the created state has a positive partial transposition with respect to any bipartite splitting, and we use a witness operator to prove its entanglement."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0909.2743","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":"0909.2743","created_at":"2026-05-18T04:36:59.401333+00:00"},{"alias_kind":"arxiv_version","alias_value":"0909.2743v1","created_at":"2026-05-18T04:36:59.401333+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0909.2743","created_at":"2026-05-18T04:36:59.401333+00:00"},{"alias_kind":"pith_short_12","alias_value":"IEKKIM7GGMEE","created_at":"2026-05-18T12:26:00.592388+00:00"},{"alias_kind":"pith_short_16","alias_value":"IEKKIM7GGMEE2AOE","created_at":"2026-05-18T12:26:00.592388+00:00"},{"alias_kind":"pith_short_8","alias_value":"IEKKIM7G","created_at":"2026-05-18T12:26:00.592388+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/IEKKIM7GGMEE2AOEHBMJVJSJFN","json":"https://pith.science/pith/IEKKIM7GGMEE2AOEHBMJVJSJFN.json","graph_json":"https://pith.science/api/pith-number/IEKKIM7GGMEE2AOEHBMJVJSJFN/graph.json","events_json":"https://pith.science/api/pith-number/IEKKIM7GGMEE2AOEHBMJVJSJFN/events.json","paper":"https://pith.science/paper/IEKKIM7G"},"agent_actions":{"view_html":"https://pith.science/pith/IEKKIM7GGMEE2AOEHBMJVJSJFN","download_json":"https://pith.science/pith/IEKKIM7GGMEE2AOEHBMJVJSJFN.json","view_paper":"https://pith.science/paper/IEKKIM7G","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0909.2743&json=true","fetch_graph":"https://pith.science/api/pith-number/IEKKIM7GGMEE2AOEHBMJVJSJFN/graph.json","fetch_events":"https://pith.science/api/pith-number/IEKKIM7GGMEE2AOEHBMJVJSJFN/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/IEKKIM7GGMEE2AOEHBMJVJSJFN/action/timestamp_anchor","attest_storage":"https://pith.science/pith/IEKKIM7GGMEE2AOEHBMJVJSJFN/action/storage_attestation","attest_author":"https://pith.science/pith/IEKKIM7GGMEE2AOEHBMJVJSJFN/action/author_attestation","sign_citation":"https://pith.science/pith/IEKKIM7GGMEE2AOEHBMJVJSJFN/action/citation_signature","submit_replication":"https://pith.science/pith/IEKKIM7GGMEE2AOEHBMJVJSJFN/action/replication_record"}},"created_at":"2026-05-18T04:36:59.401333+00:00","updated_at":"2026-05-18T04:36:59.401333+00:00"}