{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2021:FBYLN3BCLSDQT4N3SC5I5L2PTF","short_pith_number":"pith:FBYLN3BC","schema_version":"1.0","canonical_sha256":"2870b6ec225c8709f1bb90ba8eaf4f9952437c1501819cd01aae8f5f744985a8","source":{"kind":"arxiv","id":"2105.08609","version":2},"attestation_state":"computed","paper":{"title":"Generating time-domain linear cluster state by recycling superconducting qubits","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Hiroto Mukai, Jaw-Shen Tsai, Keiichi Sakata, Shotaro Shirai, Yu Zhou","submitted_at":"2021-05-18T15:41:00Z","abstract_excerpt":"Cluster states, a type of highly entangled state, are essential resources for quantum information processing. Here we demonstrated the generation of a time-domain linear cluster state (t-LCS) using a superconducting quantum circuit consisting of only two transmon qubits. By recycling the physical qubits, the t-LCS equivalent up to four physical qubits was validated by quantum state tomography with fidelity of 59%. We further confirmed the true generation of t-LCS by examining the expectation value of an entanglement witness. Our demonstrated protocol of t-LCS generation allows efficient use of"},"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":"2105.08609","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-05-18T15:41:00Z","cross_cats_sorted":[],"title_canon_sha256":"425754253bcd6ccdd1af873e70b802c09095e3264a44bd5d7c4eb1627d79c4e8","abstract_canon_sha256":"ff24e64222f49079f7023e0598a9951b6e40dd25cd9ccc6c046fbad60bfc8bdb"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:40:42.700853Z","signature_b64":"Lxnj2Lve3A7eFBpAVkE97ZcBcR2ZrtU5WP9BPsrQcjEbivwxC/GWOMdskEiPAoYN2uuLXJzBRHE9yl6/+MgwCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2870b6ec225c8709f1bb90ba8eaf4f9952437c1501819cd01aae8f5f744985a8","last_reissued_at":"2026-07-05T05:40:42.700349Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:40:42.700349Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Generating time-domain linear cluster state by recycling superconducting qubits","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Hiroto Mukai, Jaw-Shen Tsai, Keiichi Sakata, Shotaro Shirai, Yu Zhou","submitted_at":"2021-05-18T15:41:00Z","abstract_excerpt":"Cluster states, a type of highly entangled state, are essential resources for quantum information processing. Here we demonstrated the generation of a time-domain linear cluster state (t-LCS) using a superconducting quantum circuit consisting of only two transmon qubits. By recycling the physical qubits, the t-LCS equivalent up to four physical qubits was validated by quantum state tomography with fidelity of 59%. We further confirmed the true generation of t-LCS by examining the expectation value of an entanglement witness. Our demonstrated protocol of t-LCS generation allows efficient use of"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2105.08609","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2105.08609/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2105.08609","created_at":"2026-07-05T05:40:42.700410+00:00"},{"alias_kind":"arxiv_version","alias_value":"2105.08609v2","created_at":"2026-07-05T05:40:42.700410+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2105.08609","created_at":"2026-07-05T05:40:42.700410+00:00"},{"alias_kind":"pith_short_12","alias_value":"FBYLN3BCLSDQ","created_at":"2026-07-05T05:40:42.700410+00:00"},{"alias_kind":"pith_short_16","alias_value":"FBYLN3BCLSDQT4N3","created_at":"2026-07-05T05:40:42.700410+00:00"},{"alias_kind":"pith_short_8","alias_value":"FBYLN3BC","created_at":"2026-07-05T05:40:42.700410+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/FBYLN3BCLSDQT4N3SC5I5L2PTF","json":"https://pith.science/pith/FBYLN3BCLSDQT4N3SC5I5L2PTF.json","graph_json":"https://pith.science/api/pith-number/FBYLN3BCLSDQT4N3SC5I5L2PTF/graph.json","events_json":"https://pith.science/api/pith-number/FBYLN3BCLSDQT4N3SC5I5L2PTF/events.json","paper":"https://pith.science/paper/FBYLN3BC"},"agent_actions":{"view_html":"https://pith.science/pith/FBYLN3BCLSDQT4N3SC5I5L2PTF","download_json":"https://pith.science/pith/FBYLN3BCLSDQT4N3SC5I5L2PTF.json","view_paper":"https://pith.science/paper/FBYLN3BC","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2105.08609&json=true","fetch_graph":"https://pith.science/api/pith-number/FBYLN3BCLSDQT4N3SC5I5L2PTF/graph.json","fetch_events":"https://pith.science/api/pith-number/FBYLN3BCLSDQT4N3SC5I5L2PTF/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/FBYLN3BCLSDQT4N3SC5I5L2PTF/action/timestamp_anchor","attest_storage":"https://pith.science/pith/FBYLN3BCLSDQT4N3SC5I5L2PTF/action/storage_attestation","attest_author":"https://pith.science/pith/FBYLN3BCLSDQT4N3SC5I5L2PTF/action/author_attestation","sign_citation":"https://pith.science/pith/FBYLN3BCLSDQT4N3SC5I5L2PTF/action/citation_signature","submit_replication":"https://pith.science/pith/FBYLN3BCLSDQT4N3SC5I5L2PTF/action/replication_record"}},"created_at":"2026-07-05T05:40:42.700410+00:00","updated_at":"2026-07-05T05:40:42.700410+00:00"}