{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:SQRYW7TFJXMENKUAAMJWOQL2GW","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":"d93a8ee744da593f8ba4421e19a98aeea7048dc52de87901dd961b2ee107d37e","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-11-23T15:15:59Z","title_canon_sha256":"f1ba33cdd61130cdac3d11b32c4075fa472d09b1c0b7cc4cb879e656db8fa35f"},"schema_version":"1.0","source":{"id":"2111.11937","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2111.11937","created_at":"2026-07-05T05:25:13Z"},{"alias_kind":"arxiv_version","alias_value":"2111.11937v1","created_at":"2026-07-05T05:25:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2111.11937","created_at":"2026-07-05T05:25:13Z"},{"alias_kind":"pith_short_12","alias_value":"SQRYW7TFJXME","created_at":"2026-07-05T05:25:13Z"},{"alias_kind":"pith_short_16","alias_value":"SQRYW7TFJXMENKUA","created_at":"2026-07-05T05:25:13Z"},{"alias_kind":"pith_short_8","alias_value":"SQRYW7TF","created_at":"2026-07-05T05:25:13Z"}],"graph_snapshots":[{"event_id":"sha256:e2186250aa719b676aa0e5ad27c5a16bc8b7f0e00fb78cbf631934cfa1453adb","target":"graph","created_at":"2026-07-05T05:25:13Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2111.11937/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Silicon spin qubits satisfy the necessary criteria for quantum information processing. However, a demonstration of high fidelity state preparation and readout combined with high fidelity single- and two-qubit gates, all of which must be present for quantum error correction, has been lacking. We use a two qubit Si/SiGe quantum processor to demonstrate state preparation and readout with fidelity over 97%, combined with both single- and two-qubit control fidelities exceeding 99%. The operation of the quantum processor is quantitatively characterized using gate set tomography and randomized benchm","authors_text":"A. J. Sigillito, A. R. Mills, C. R. Guinn, E. Nielsen, J. R. Petta, M. J. Gullans, M. M. Feldman","cross_cats":["cond-mat.mes-hall"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-11-23T15:15:59Z","title":"Two-qubit silicon quantum processor with operation fidelity exceeding 99%"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2111.11937","kind":"arxiv","version":1},"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":"sha256:8d571113df13de8f6f0f721f973a8daaa3bfe21075f8aaeb32df8dcedbe3b739","target":"record","created_at":"2026-07-05T05:25:13Z","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":"d93a8ee744da593f8ba4421e19a98aeea7048dc52de87901dd961b2ee107d37e","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-11-23T15:15:59Z","title_canon_sha256":"f1ba33cdd61130cdac3d11b32c4075fa472d09b1c0b7cc4cb879e656db8fa35f"},"schema_version":"1.0","source":{"id":"2111.11937","kind":"arxiv","version":1}},"canonical_sha256":"94238b7e654dd846aa80031367417a358dd61942fe63f647ea43ef2a05725658","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"94238b7e654dd846aa80031367417a358dd61942fe63f647ea43ef2a05725658","first_computed_at":"2026-07-05T05:25:13.296622Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T05:25:13.296622Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"bl0UZ1iMFHw0u/yYWEY+AQQO3eakPpdu/QFj9dsiJVEE5J+9bwpxHN67DFL9x5cSblYHUjKMzaVukp7JCxaqDA==","signature_status":"signed_v1","signed_at":"2026-07-05T05:25:13.297077Z","signed_message":"canonical_sha256_bytes"},"source_id":"2111.11937","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8d571113df13de8f6f0f721f973a8daaa3bfe21075f8aaeb32df8dcedbe3b739","sha256:e2186250aa719b676aa0e5ad27c5a16bc8b7f0e00fb78cbf631934cfa1453adb"],"state_sha256":"ef9b41b22ac44df2c7fdaad8a19b1320ff27bd60c5060047be04f937237313f1"}