{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2007:T3GMJCEJMP3PKW37HHGNPMHEBN","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":"b1530e18c73d55191de8bd70e18f3babeef03a3087c5cf2b402e7efa679e82cf","cross_cats_sorted":[],"license":"","primary_cat":"quant-ph","submitted_at":"2007-05-01T21:57:12Z","title_canon_sha256":"c3070921b4f6e9db313d90953bfbdda03256db6187bc977784ec47e81df90357"},"schema_version":"1.0","source":{"id":"0705.0174","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0705.0174","created_at":"2026-05-18T03:42:12Z"},{"alias_kind":"arxiv_version","alias_value":"0705.0174v2","created_at":"2026-05-18T03:42:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0705.0174","created_at":"2026-05-18T03:42:12Z"},{"alias_kind":"pith_short_12","alias_value":"T3GMJCEJMP3P","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_16","alias_value":"T3GMJCEJMP3PKW37","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_8","alias_value":"T3GMJCEJ","created_at":"2026-05-18T12:25:56Z"}],"graph_snapshots":[{"event_id":"sha256:56cffc8342a261f41f438e01a9e439b633aa56a740bb6a2127d63c9ef89d03dd","target":"graph","created_at":"2026-05-18T03:42:12Z","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":"We report an experimental realization of one-way quantum computing on a two-photon four-qubit cluster state. This is accomplished by developing a two-photon cluster state source entangled both in polarization and spatial modes. With this special source, we implemented a highly efficient Grover's search algorithm and high-fidelity two qubits quantum gates. Our experiment demonstrates that such cluster states could serve as an ideal source and a building block for rapid and precise optical quantum computation.","authors_text":"Alexander Goebel, Alois Mair, Che-Ming Li, Jian-Wei Pan, Kai Chen, Qiang Zhang, Shuai Chen, Yu-Ao Chen","cross_cats":[],"headline":"","license":"","primary_cat":"quant-ph","submitted_at":"2007-05-01T21:57:12Z","title":"Experimental realization of one-way quantum computing with two-photon four-qubit cluster states"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0705.0174","kind":"arxiv","version":2},"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":"sha256:05b5ef90dd011d2ce6a0d61117ff52bcddd2beeb6aa6b4f5a17aab4bbbbf8d46","target":"record","created_at":"2026-05-18T03:42:12Z","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":"b1530e18c73d55191de8bd70e18f3babeef03a3087c5cf2b402e7efa679e82cf","cross_cats_sorted":[],"license":"","primary_cat":"quant-ph","submitted_at":"2007-05-01T21:57:12Z","title_canon_sha256":"c3070921b4f6e9db313d90953bfbdda03256db6187bc977784ec47e81df90357"},"schema_version":"1.0","source":{"id":"0705.0174","kind":"arxiv","version":2}},"canonical_sha256":"9eccc4888963f6f55b7f39ccd7b0e40b65fce326d2d5602e312a471e31c14130","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9eccc4888963f6f55b7f39ccd7b0e40b65fce326d2d5602e312a471e31c14130","first_computed_at":"2026-05-18T03:42:12.308418Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:42:12.308418Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"P8j6YH9ALx7Cg9/i6HpLdW+r6267871qLLLGfQD4Bb+vJjTSwZgiXSFa04JoXHUZdBm+n9TQhdN6AVjv08PVDw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:42:12.309170Z","signed_message":"canonical_sha256_bytes"},"source_id":"0705.0174","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:05b5ef90dd011d2ce6a0d61117ff52bcddd2beeb6aa6b4f5a17aab4bbbbf8d46","sha256:56cffc8342a261f41f438e01a9e439b633aa56a740bb6a2127d63c9ef89d03dd"],"state_sha256":"dbb9797c87283902393554cf76269582e7425d4e4d88e9155c95e38bfde5d4cf"}