{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:EA5UMPEIHZFMAOZK3CEFK255BN","short_pith_number":"pith:EA5UMPEI","canonical_record":{"source":{"id":"1404.5402","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2014-04-22T07:38:07Z","cross_cats_sorted":[],"title_canon_sha256":"bd9e5ea4eba10b14c096ece60dee662336ab9d8d4067e1662969742b6eb7879c","abstract_canon_sha256":"a97e35dc06eaf4250792d593c588cd737a4cb23253a2d917a5cdd5936552c957"},"schema_version":"1.0"},"canonical_sha256":"203b463c883e4ac03b2ad888556bbd0b413bf24f5b46e085dac95587a7fc3f69","source":{"kind":"arxiv","id":"1404.5402","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1404.5402","created_at":"2026-05-18T01:17:05Z"},{"alias_kind":"arxiv_version","alias_value":"1404.5402v1","created_at":"2026-05-18T01:17:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1404.5402","created_at":"2026-05-18T01:17:05Z"},{"alias_kind":"pith_short_12","alias_value":"EA5UMPEIHZFM","created_at":"2026-05-18T12:28:25Z"},{"alias_kind":"pith_short_16","alias_value":"EA5UMPEIHZFMAOZK","created_at":"2026-05-18T12:28:25Z"},{"alias_kind":"pith_short_8","alias_value":"EA5UMPEI","created_at":"2026-05-18T12:28:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:EA5UMPEIHZFMAOZK3CEFK255BN","target":"record","payload":{"canonical_record":{"source":{"id":"1404.5402","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2014-04-22T07:38:07Z","cross_cats_sorted":[],"title_canon_sha256":"bd9e5ea4eba10b14c096ece60dee662336ab9d8d4067e1662969742b6eb7879c","abstract_canon_sha256":"a97e35dc06eaf4250792d593c588cd737a4cb23253a2d917a5cdd5936552c957"},"schema_version":"1.0"},"canonical_sha256":"203b463c883e4ac03b2ad888556bbd0b413bf24f5b46e085dac95587a7fc3f69","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:17:05.729960Z","signature_b64":"3up2P3MFDz+ZRhLCC0D3LKBGqcRcgajU+K+lrEjSfRnBFh1nsBU2GQmA6k7xfbwvBQMsF13qwWfe38wNzNuiAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"203b463c883e4ac03b2ad888556bbd0b413bf24f5b46e085dac95587a7fc3f69","last_reissued_at":"2026-05-18T01:17:05.729200Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:17:05.729200Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1404.5402","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":"2026-05-18T01:17:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HXXQ3leDd0F4b9C87EhNypWcFyx151vt+mwfhY6KOIVYJNXZ9iaFNpmBVmf0nqH4gvRxLofS3As0vwaLvHmADw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T05:09:04.501955Z"},"content_sha256":"d4a84a4522f5a1354e9d3a23caa4bcf150a21ab9d7bc15550d7eb99df3633528","schema_version":"1.0","event_id":"sha256:d4a84a4522f5a1354e9d3a23caa4bcf150a21ab9d7bc15550d7eb99df3633528"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:EA5UMPEIHZFMAOZK3CEFK255BN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Electrical control of a long-lived spin qubit in a Si/SiGe quantum dot","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"D. E. Savage, D. R. Ward, E. Kawakami, F. R. Braakman, L. M. K. Vandersypen, M. A. Eriksson, Mark Friesen, M. G. Lagally, P. Scarlino, S. N. Coppersmith","submitted_at":"2014-04-22T07:38:07Z","abstract_excerpt":"Nanofabricated quantum bits permit large-scale integration but usually suffer from short coherence times due to interactions with their solid-state environment. The outstanding challenge is to engineer the environment so that it minimally affects the qubit, but still allows qubit control and scalability. Here we demonstrate a long-lived single-electron spin qubit in a Si/SiGe quantum dot with all-electrical two-axis control. The spin is driven by resonant microwave electric fields in a transverse magnetic field gradient from a local micromagnet, and the spin state is read out in single-shot mo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1404.5402","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":"2026-05-18T01:17:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IUoVSsQJt4QjDafze00qUsl9jqqshkLJOvEnivIugPPFzJSb5AukEgN6Snr0sf2HgBQA8lAlROFhV2f5Rtn8AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T05:09:04.502300Z"},"content_sha256":"7b277c4339e78fc8d9ec68eb907ed194837c48e9e14a9662f4707f6d9650b872","schema_version":"1.0","event_id":"sha256:7b277c4339e78fc8d9ec68eb907ed194837c48e9e14a9662f4707f6d9650b872"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EA5UMPEIHZFMAOZK3CEFK255BN/bundle.json","state_url":"https://pith.science/pith/EA5UMPEIHZFMAOZK3CEFK255BN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EA5UMPEIHZFMAOZK3CEFK255BN/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":"2026-06-04T05:09:04Z","links":{"resolver":"https://pith.science/pith/EA5UMPEIHZFMAOZK3CEFK255BN","bundle":"https://pith.science/pith/EA5UMPEIHZFMAOZK3CEFK255BN/bundle.json","state":"https://pith.science/pith/EA5UMPEIHZFMAOZK3CEFK255BN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EA5UMPEIHZFMAOZK3CEFK255BN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:EA5UMPEIHZFMAOZK3CEFK255BN","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":"a97e35dc06eaf4250792d593c588cd737a4cb23253a2d917a5cdd5936552c957","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2014-04-22T07:38:07Z","title_canon_sha256":"bd9e5ea4eba10b14c096ece60dee662336ab9d8d4067e1662969742b6eb7879c"},"schema_version":"1.0","source":{"id":"1404.5402","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1404.5402","created_at":"2026-05-18T01:17:05Z"},{"alias_kind":"arxiv_version","alias_value":"1404.5402v1","created_at":"2026-05-18T01:17:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1404.5402","created_at":"2026-05-18T01:17:05Z"},{"alias_kind":"pith_short_12","alias_value":"EA5UMPEIHZFM","created_at":"2026-05-18T12:28:25Z"},{"alias_kind":"pith_short_16","alias_value":"EA5UMPEIHZFMAOZK","created_at":"2026-05-18T12:28:25Z"},{"alias_kind":"pith_short_8","alias_value":"EA5UMPEI","created_at":"2026-05-18T12:28:25Z"}],"graph_snapshots":[{"event_id":"sha256:7b277c4339e78fc8d9ec68eb907ed194837c48e9e14a9662f4707f6d9650b872","target":"graph","created_at":"2026-05-18T01:17:05Z","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":"Nanofabricated quantum bits permit large-scale integration but usually suffer from short coherence times due to interactions with their solid-state environment. The outstanding challenge is to engineer the environment so that it minimally affects the qubit, but still allows qubit control and scalability. Here we demonstrate a long-lived single-electron spin qubit in a Si/SiGe quantum dot with all-electrical two-axis control. The spin is driven by resonant microwave electric fields in a transverse magnetic field gradient from a local micromagnet, and the spin state is read out in single-shot mo","authors_text":"D. E. Savage, D. R. Ward, E. Kawakami, F. R. Braakman, L. M. K. Vandersypen, M. A. Eriksson, Mark Friesen, M. G. Lagally, P. Scarlino, S. N. Coppersmith","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2014-04-22T07:38:07Z","title":"Electrical control of a long-lived spin qubit in a Si/SiGe quantum dot"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1404.5402","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:d4a84a4522f5a1354e9d3a23caa4bcf150a21ab9d7bc15550d7eb99df3633528","target":"record","created_at":"2026-05-18T01:17:05Z","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":"a97e35dc06eaf4250792d593c588cd737a4cb23253a2d917a5cdd5936552c957","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2014-04-22T07:38:07Z","title_canon_sha256":"bd9e5ea4eba10b14c096ece60dee662336ab9d8d4067e1662969742b6eb7879c"},"schema_version":"1.0","source":{"id":"1404.5402","kind":"arxiv","version":1}},"canonical_sha256":"203b463c883e4ac03b2ad888556bbd0b413bf24f5b46e085dac95587a7fc3f69","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"203b463c883e4ac03b2ad888556bbd0b413bf24f5b46e085dac95587a7fc3f69","first_computed_at":"2026-05-18T01:17:05.729200Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:17:05.729200Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3up2P3MFDz+ZRhLCC0D3LKBGqcRcgajU+K+lrEjSfRnBFh1nsBU2GQmA6k7xfbwvBQMsF13qwWfe38wNzNuiAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:17:05.729960Z","signed_message":"canonical_sha256_bytes"},"source_id":"1404.5402","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d4a84a4522f5a1354e9d3a23caa4bcf150a21ab9d7bc15550d7eb99df3633528","sha256:7b277c4339e78fc8d9ec68eb907ed194837c48e9e14a9662f4707f6d9650b872"],"state_sha256":"0e86e701b9c003b02b4580dfd67fa424611401c6ee8f92518705b69ee33ce56f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VWXTO4DOgOjQPhz/NGXyfHPxKEUfAVTqF4ymE3PdDEjiDA0Y1OCUDzKaMAizHFdoHVGMgu0H3ZoieJWGvimuCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T05:09:04.504365Z","bundle_sha256":"11716cf69836b39adf73bd0de27fcbab9fa5f50b951a20db587c037f9e77c0b0"}}