{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:THAWAXMIJPLIMMWY3WFPH5FZ77","short_pith_number":"pith:THAWAXMI","canonical_record":{"source":{"id":"1608.04258","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2016-08-15T12:48:08Z","cross_cats_sorted":["quant-ph"],"title_canon_sha256":"8be37da1f719705ecea3a99159706ed06fba49cf5aef08e33032e930698a5a6a","abstract_canon_sha256":"60675b6a14dfb85ed4a0859943d9d4d2495b43da2b571cb75ff9804e50c8e8d6"},"schema_version":"1.0"},"canonical_sha256":"99c1605d884bd68632d8dd8af3f4b9ffd2e59ef1d8f343bf68e983b9826ac20f","source":{"kind":"arxiv","id":"1608.04258","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1608.04258","created_at":"2026-05-18T01:09:03Z"},{"alias_kind":"arxiv_version","alias_value":"1608.04258v1","created_at":"2026-05-18T01:09:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1608.04258","created_at":"2026-05-18T01:09:03Z"},{"alias_kind":"pith_short_12","alias_value":"THAWAXMIJPLI","created_at":"2026-05-18T12:30:44Z"},{"alias_kind":"pith_short_16","alias_value":"THAWAXMIJPLIMMWY","created_at":"2026-05-18T12:30:44Z"},{"alias_kind":"pith_short_8","alias_value":"THAWAXMI","created_at":"2026-05-18T12:30:44Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:THAWAXMIJPLIMMWY3WFPH5FZ77","target":"record","payload":{"canonical_record":{"source":{"id":"1608.04258","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2016-08-15T12:48:08Z","cross_cats_sorted":["quant-ph"],"title_canon_sha256":"8be37da1f719705ecea3a99159706ed06fba49cf5aef08e33032e930698a5a6a","abstract_canon_sha256":"60675b6a14dfb85ed4a0859943d9d4d2495b43da2b571cb75ff9804e50c8e8d6"},"schema_version":"1.0"},"canonical_sha256":"99c1605d884bd68632d8dd8af3f4b9ffd2e59ef1d8f343bf68e983b9826ac20f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:09:03.931629Z","signature_b64":"hkkqFmTuVE7KIeBQC/lnxNmhnEmLwD1xK1VajScSu2PY5G0wLe5hfZpzNS5f4/B7yQXoZMUXjgbGhXKRtDBgAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"99c1605d884bd68632d8dd8af3f4b9ffd2e59ef1d8f343bf68e983b9826ac20f","last_reissued_at":"2026-05-18T01:09:03.931128Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:09:03.931128Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1608.04258","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:09:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9I9cz9Bw6E1oBVF/h4lopzLVOXaGSncAoHNxVc2pDZR/VT6K9fqkSGX8ub66DJeCnIIRiLsByAbL4wtXeVFBCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T21:33:36.058002Z"},"content_sha256":"9722e088d9e64244393a654e335d42b33c4b59d6f81ed017d8a3f463a1ee505e","schema_version":"1.0","event_id":"sha256:9722e088d9e64244393a654e335d42b33c4b59d6f81ed017d8a3f463a1ee505e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:THAWAXMIJPLIMMWY3WFPH5FZ77","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"High-fidelity entangling gate for double-quantum-dot spin qubits","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["quant-ph"],"primary_cat":"cond-mat.mes-hall","authors_text":"Amir Yacoby, Geoffrey C. Gardner, John M. Nichol, Lucas A. Orona, Michael J. Manfra, Saeed Fallahi, Shannon P. Harvey","submitted_at":"2016-08-15T12:48:08Z","abstract_excerpt":"Electron spins in semiconductors are promising qubits because their long coherence times enable nearly 10^9 coherent quantum gate operations. However, developing a scalable high-fidelity two-qubit gate remains challenging. Here, we demonstrate an entangling gate between two double-quantum-dot spin qubits in GaAs by using a magnetic field gradient between the two dots in each qubit to suppress decoherence due to charge noise. When the magnetic gradient dominates the voltage-controlled exchange interaction between electrons, qubit coherence times increase by an order of magnitude. Using randomiz"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1608.04258","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:09:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"F3HYxvZokotZSxn7fNlqNDQpA5x6POykP3clV9gDdOcEtlPeJ/Ze3dt8P1dzsDzs0PDIdmIixAI6dMgIG1A9Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T21:33:36.058391Z"},"content_sha256":"a5cdd52e85c1b2866bbb396b85bd0b2106580a4a6668d1a37e76b37e01fd5e18","schema_version":"1.0","event_id":"sha256:a5cdd52e85c1b2866bbb396b85bd0b2106580a4a6668d1a37e76b37e01fd5e18"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/THAWAXMIJPLIMMWY3WFPH5FZ77/bundle.json","state_url":"https://pith.science/pith/THAWAXMIJPLIMMWY3WFPH5FZ77/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/THAWAXMIJPLIMMWY3WFPH5FZ77/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-02T21:33:36Z","links":{"resolver":"https://pith.science/pith/THAWAXMIJPLIMMWY3WFPH5FZ77","bundle":"https://pith.science/pith/THAWAXMIJPLIMMWY3WFPH5FZ77/bundle.json","state":"https://pith.science/pith/THAWAXMIJPLIMMWY3WFPH5FZ77/state.json","well_known_bundle":"https://pith.science/.well-known/pith/THAWAXMIJPLIMMWY3WFPH5FZ77/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:THAWAXMIJPLIMMWY3WFPH5FZ77","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":"60675b6a14dfb85ed4a0859943d9d4d2495b43da2b571cb75ff9804e50c8e8d6","cross_cats_sorted":["quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2016-08-15T12:48:08Z","title_canon_sha256":"8be37da1f719705ecea3a99159706ed06fba49cf5aef08e33032e930698a5a6a"},"schema_version":"1.0","source":{"id":"1608.04258","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1608.04258","created_at":"2026-05-18T01:09:03Z"},{"alias_kind":"arxiv_version","alias_value":"1608.04258v1","created_at":"2026-05-18T01:09:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1608.04258","created_at":"2026-05-18T01:09:03Z"},{"alias_kind":"pith_short_12","alias_value":"THAWAXMIJPLI","created_at":"2026-05-18T12:30:44Z"},{"alias_kind":"pith_short_16","alias_value":"THAWAXMIJPLIMMWY","created_at":"2026-05-18T12:30:44Z"},{"alias_kind":"pith_short_8","alias_value":"THAWAXMI","created_at":"2026-05-18T12:30:44Z"}],"graph_snapshots":[{"event_id":"sha256:a5cdd52e85c1b2866bbb396b85bd0b2106580a4a6668d1a37e76b37e01fd5e18","target":"graph","created_at":"2026-05-18T01:09:03Z","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":"Electron spins in semiconductors are promising qubits because their long coherence times enable nearly 10^9 coherent quantum gate operations. However, developing a scalable high-fidelity two-qubit gate remains challenging. Here, we demonstrate an entangling gate between two double-quantum-dot spin qubits in GaAs by using a magnetic field gradient between the two dots in each qubit to suppress decoherence due to charge noise. When the magnetic gradient dominates the voltage-controlled exchange interaction between electrons, qubit coherence times increase by an order of magnitude. Using randomiz","authors_text":"Amir Yacoby, Geoffrey C. Gardner, John M. Nichol, Lucas A. Orona, Michael J. Manfra, Saeed Fallahi, Shannon P. Harvey","cross_cats":["quant-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2016-08-15T12:48:08Z","title":"High-fidelity entangling gate for double-quantum-dot spin qubits"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1608.04258","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":"sha256:9722e088d9e64244393a654e335d42b33c4b59d6f81ed017d8a3f463a1ee505e","target":"record","created_at":"2026-05-18T01:09:03Z","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":"60675b6a14dfb85ed4a0859943d9d4d2495b43da2b571cb75ff9804e50c8e8d6","cross_cats_sorted":["quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2016-08-15T12:48:08Z","title_canon_sha256":"8be37da1f719705ecea3a99159706ed06fba49cf5aef08e33032e930698a5a6a"},"schema_version":"1.0","source":{"id":"1608.04258","kind":"arxiv","version":1}},"canonical_sha256":"99c1605d884bd68632d8dd8af3f4b9ffd2e59ef1d8f343bf68e983b9826ac20f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"99c1605d884bd68632d8dd8af3f4b9ffd2e59ef1d8f343bf68e983b9826ac20f","first_computed_at":"2026-05-18T01:09:03.931128Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:09:03.931128Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hkkqFmTuVE7KIeBQC/lnxNmhnEmLwD1xK1VajScSu2PY5G0wLe5hfZpzNS5f4/B7yQXoZMUXjgbGhXKRtDBgAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:09:03.931629Z","signed_message":"canonical_sha256_bytes"},"source_id":"1608.04258","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9722e088d9e64244393a654e335d42b33c4b59d6f81ed017d8a3f463a1ee505e","sha256:a5cdd52e85c1b2866bbb396b85bd0b2106580a4a6668d1a37e76b37e01fd5e18"],"state_sha256":"fed7157c217f2e4563e2ce84611528edf74c646a9798237c48ab6a7050fdf687"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YtO5aHq4JRG2WSliwpY1J3C2VXTBHvSjkZBvkC04S+HZFPJMkCVcMd095W4U9HLXPjUzxBlRsDnNs3ystCHXAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T21:33:36.060343Z","bundle_sha256":"bed9909d0ca979b196b1dcd64b5e9cba240d3ff523a5eac05ffedb80931685e4"}}