{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2009:P7THU5UZN7KG6BDWTSOOU4QVOM","short_pith_number":"pith:P7THU5UZ","schema_version":"1.0","canonical_sha256":"7fe67a76996fd46f04769c9cea7215731df100700e84593ec62bc7f849b60d55","source":{"kind":"arxiv","id":"0902.2697","version":1},"attestation_state":"computed","paper":{"title":"Entanglement Sudden Death as an Indicator of Fidelity in a Four-Qubit Cluster State","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Yaakov S. Weinstein","submitted_at":"2009-02-16T14:14:14Z","abstract_excerpt":"I explore the entanglement evolution of a four qubit cluster state in a dephasing environment concentrating on the phenomenon of entanglement sudden death (ESD). Specifically, I ask whether the onset of ESD has an effect on the utilization of this cluster state as a means of implementing a single qubit rotation in the measurement based cluster state model of quantum computation. To do this I compare the evolution of the entanglement to the fidelity, a measure of how accurately the desired state (after the measurement based operations) is achieved. I find that ESD does not cause a change of beh"},"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":"0902.2697","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-02-16T14:14:14Z","cross_cats_sorted":[],"title_canon_sha256":"7dcaed71424a4cffec27cc1da0702512c5e31173cbdde2ff49b9287305358d5f","abstract_canon_sha256":"45af7deb4dc7c6fede63d9ee876786ea602b1ff579aeac8982941c4dd5901393"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:14:47.623289Z","signature_b64":"MBfyF3Pk3qqM19RbSRK09ty5swcXpqkYYfkC4UKjoX+Hhc8G3uzHgp3E0U+aZuJW4C01CFPLQDs6ymrQJTvhBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7fe67a76996fd46f04769c9cea7215731df100700e84593ec62bc7f849b60d55","last_reissued_at":"2026-05-18T02:14:47.622667Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:14:47.622667Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Entanglement Sudden Death as an Indicator of Fidelity in a Four-Qubit Cluster State","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Yaakov S. Weinstein","submitted_at":"2009-02-16T14:14:14Z","abstract_excerpt":"I explore the entanglement evolution of a four qubit cluster state in a dephasing environment concentrating on the phenomenon of entanglement sudden death (ESD). Specifically, I ask whether the onset of ESD has an effect on the utilization of this cluster state as a means of implementing a single qubit rotation in the measurement based cluster state model of quantum computation. To do this I compare the evolution of the entanglement to the fidelity, a measure of how accurately the desired state (after the measurement based operations) is achieved. I find that ESD does not cause a change of beh"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0902.2697","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":"0902.2697","created_at":"2026-05-18T02:14:47.622766+00:00"},{"alias_kind":"arxiv_version","alias_value":"0902.2697v1","created_at":"2026-05-18T02:14:47.622766+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0902.2697","created_at":"2026-05-18T02:14:47.622766+00:00"},{"alias_kind":"pith_short_12","alias_value":"P7THU5UZN7KG","created_at":"2026-05-18T12:26:01.383474+00:00"},{"alias_kind":"pith_short_16","alias_value":"P7THU5UZN7KG6BDW","created_at":"2026-05-18T12:26:01.383474+00:00"},{"alias_kind":"pith_short_8","alias_value":"P7THU5UZ","created_at":"2026-05-18T12:26:01.383474+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/P7THU5UZN7KG6BDWTSOOU4QVOM","json":"https://pith.science/pith/P7THU5UZN7KG6BDWTSOOU4QVOM.json","graph_json":"https://pith.science/api/pith-number/P7THU5UZN7KG6BDWTSOOU4QVOM/graph.json","events_json":"https://pith.science/api/pith-number/P7THU5UZN7KG6BDWTSOOU4QVOM/events.json","paper":"https://pith.science/paper/P7THU5UZ"},"agent_actions":{"view_html":"https://pith.science/pith/P7THU5UZN7KG6BDWTSOOU4QVOM","download_json":"https://pith.science/pith/P7THU5UZN7KG6BDWTSOOU4QVOM.json","view_paper":"https://pith.science/paper/P7THU5UZ","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0902.2697&json=true","fetch_graph":"https://pith.science/api/pith-number/P7THU5UZN7KG6BDWTSOOU4QVOM/graph.json","fetch_events":"https://pith.science/api/pith-number/P7THU5UZN7KG6BDWTSOOU4QVOM/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/P7THU5UZN7KG6BDWTSOOU4QVOM/action/timestamp_anchor","attest_storage":"https://pith.science/pith/P7THU5UZN7KG6BDWTSOOU4QVOM/action/storage_attestation","attest_author":"https://pith.science/pith/P7THU5UZN7KG6BDWTSOOU4QVOM/action/author_attestation","sign_citation":"https://pith.science/pith/P7THU5UZN7KG6BDWTSOOU4QVOM/action/citation_signature","submit_replication":"https://pith.science/pith/P7THU5UZN7KG6BDWTSOOU4QVOM/action/replication_record"}},"created_at":"2026-05-18T02:14:47.622766+00:00","updated_at":"2026-05-18T02:14:47.622766+00:00"}