{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:RVBDM5I4QYTNM35VI4MPNBNGVX","short_pith_number":"pith:RVBDM5I4","canonical_record":{"source":{"id":"2405.10667","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2024-05-17T09:58:47Z","cross_cats_sorted":[],"title_canon_sha256":"6edb8c7cb1656b48ee645d5d385a46b9bc97e930e79f5366d064d017e6563093","abstract_canon_sha256":"5c9866359d6ca965c5fb028e6adf3b34707ebf90b8b97279e7ace6cd39fa5cb5"},"schema_version":"1.0"},"canonical_sha256":"8d4236751c8626d66fb54718f685a6adf6b33315a9c2c9d5c2fcc79e58b99f72","source":{"kind":"arxiv","id":"2405.10667","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2405.10667","created_at":"2026-07-05T08:20:15Z"},{"alias_kind":"arxiv_version","alias_value":"2405.10667v1","created_at":"2026-07-05T08:20:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2405.10667","created_at":"2026-07-05T08:20:15Z"},{"alias_kind":"pith_short_12","alias_value":"RVBDM5I4QYTN","created_at":"2026-07-05T08:20:15Z"},{"alias_kind":"pith_short_16","alias_value":"RVBDM5I4QYTNM35V","created_at":"2026-07-05T08:20:15Z"},{"alias_kind":"pith_short_8","alias_value":"RVBDM5I4","created_at":"2026-07-05T08:20:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:RVBDM5I4QYTNM35VI4MPNBNGVX","target":"record","payload":{"canonical_record":{"source":{"id":"2405.10667","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2024-05-17T09:58:47Z","cross_cats_sorted":[],"title_canon_sha256":"6edb8c7cb1656b48ee645d5d385a46b9bc97e930e79f5366d064d017e6563093","abstract_canon_sha256":"5c9866359d6ca965c5fb028e6adf3b34707ebf90b8b97279e7ace6cd39fa5cb5"},"schema_version":"1.0"},"canonical_sha256":"8d4236751c8626d66fb54718f685a6adf6b33315a9c2c9d5c2fcc79e58b99f72","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T08:20:15.125456Z","signature_b64":"ZG8XR3nkg3b4x0rui86pDiTr0EPIbi3AM3r0HoJSeZtk6N0Mp3XMMP0SJdbnvl9spgzoiVtMejnjFQqND1Y9DA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8d4236751c8626d66fb54718f685a6adf6b33315a9c2c9d5c2fcc79e58b99f72","last_reissued_at":"2026-07-05T08:20:15.124989Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T08:20:15.124989Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2405.10667","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":"2026-07-05T08:20:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SP26G9IqJNhX7/WRxHvKYlGXAN49dm+qyHWjQl6YXPTLRi5Tww+/xvkUuQkKo0QkyKtIYcRtx9sxCxVaVdRxAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-13T19:11:42.167452Z"},"content_sha256":"a9d6929e29056922953e55fbd7a8bfc666f4db24c94f6886479ccc95a8ccd05f","schema_version":"1.0","event_id":"sha256:a9d6929e29056922953e55fbd7a8bfc666f4db24c94f6886479ccc95a8ccd05f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:RVBDM5I4QYTNM35VI4MPNBNGVX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Coherence limit due to hyperfine interaction with nuclei in the barrier material of Si spin qubits","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"Christoph Wilhelmer, Daniel Loss, Dominic Waldh\\\"or, Lukas Cvitkovich, Peter Stano, Tibor Grasser, Yann-Michel Niquet","submitted_at":"2024-05-17T09:58:47Z","abstract_excerpt":"On the quest to understand and reduce environmental noise in Si spin qubits, hyperfine interactions between electron and nuclear spins impose a major challenge. Silicon is a promising host material because one can enhance the spin coherence time by removing spinful $^{29}$Si isotopes. As more experiments rely on isotopic purification of Si, the role of other spinful atoms in the device should be clarified. This is not a straightforward task, as the hyperfine interactions with atoms in the barrier layers are poorly understood. We utilize density functional theory to determine the hyperfine tens"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2405.10667","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2405.10667/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T08:20:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pzRqlTlqQQGtutSpja2dCJ/y8DCaU+WKHa51gp2t7Pd4C22Av1I3Y9a0JLZu88Yi/9ElGSQnFRp1GqBy2fg7Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-13T19:11:42.168243Z"},"content_sha256":"9dea85c0147d691320c8b794dfeac1fecf78697d057ee40390d575da04e90aba","schema_version":"1.0","event_id":"sha256:9dea85c0147d691320c8b794dfeac1fecf78697d057ee40390d575da04e90aba"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RVBDM5I4QYTNM35VI4MPNBNGVX/bundle.json","state_url":"https://pith.science/pith/RVBDM5I4QYTNM35VI4MPNBNGVX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RVBDM5I4QYTNM35VI4MPNBNGVX/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":"2026-08-13T19:11:42Z","links":{"resolver":"https://pith.science/pith/RVBDM5I4QYTNM35VI4MPNBNGVX","bundle":"https://pith.science/pith/RVBDM5I4QYTNM35VI4MPNBNGVX/bundle.json","state":"https://pith.science/pith/RVBDM5I4QYTNM35VI4MPNBNGVX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RVBDM5I4QYTNM35VI4MPNBNGVX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:RVBDM5I4QYTNM35VI4MPNBNGVX","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":"5c9866359d6ca965c5fb028e6adf3b34707ebf90b8b97279e7ace6cd39fa5cb5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2024-05-17T09:58:47Z","title_canon_sha256":"6edb8c7cb1656b48ee645d5d385a46b9bc97e930e79f5366d064d017e6563093"},"schema_version":"1.0","source":{"id":"2405.10667","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2405.10667","created_at":"2026-07-05T08:20:15Z"},{"alias_kind":"arxiv_version","alias_value":"2405.10667v1","created_at":"2026-07-05T08:20:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2405.10667","created_at":"2026-07-05T08:20:15Z"},{"alias_kind":"pith_short_12","alias_value":"RVBDM5I4QYTN","created_at":"2026-07-05T08:20:15Z"},{"alias_kind":"pith_short_16","alias_value":"RVBDM5I4QYTNM35V","created_at":"2026-07-05T08:20:15Z"},{"alias_kind":"pith_short_8","alias_value":"RVBDM5I4","created_at":"2026-07-05T08:20:15Z"}],"graph_snapshots":[{"event_id":"sha256:9dea85c0147d691320c8b794dfeac1fecf78697d057ee40390d575da04e90aba","target":"graph","created_at":"2026-07-05T08:20:15Z","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/2405.10667/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"On the quest to understand and reduce environmental noise in Si spin qubits, hyperfine interactions between electron and nuclear spins impose a major challenge. Silicon is a promising host material because one can enhance the spin coherence time by removing spinful $^{29}$Si isotopes. As more experiments rely on isotopic purification of Si, the role of other spinful atoms in the device should be clarified. This is not a straightforward task, as the hyperfine interactions with atoms in the barrier layers are poorly understood. We utilize density functional theory to determine the hyperfine tens","authors_text":"Christoph Wilhelmer, Daniel Loss, Dominic Waldh\\\"or, Lukas Cvitkovich, Peter Stano, Tibor Grasser, Yann-Michel Niquet","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2024-05-17T09:58:47Z","title":"Coherence limit due to hyperfine interaction with nuclei in the barrier material of Si spin qubits"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2405.10667","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:a9d6929e29056922953e55fbd7a8bfc666f4db24c94f6886479ccc95a8ccd05f","target":"record","created_at":"2026-07-05T08:20:15Z","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":"5c9866359d6ca965c5fb028e6adf3b34707ebf90b8b97279e7ace6cd39fa5cb5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2024-05-17T09:58:47Z","title_canon_sha256":"6edb8c7cb1656b48ee645d5d385a46b9bc97e930e79f5366d064d017e6563093"},"schema_version":"1.0","source":{"id":"2405.10667","kind":"arxiv","version":1}},"canonical_sha256":"8d4236751c8626d66fb54718f685a6adf6b33315a9c2c9d5c2fcc79e58b99f72","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8d4236751c8626d66fb54718f685a6adf6b33315a9c2c9d5c2fcc79e58b99f72","first_computed_at":"2026-07-05T08:20:15.124989Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T08:20:15.124989Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ZG8XR3nkg3b4x0rui86pDiTr0EPIbi3AM3r0HoJSeZtk6N0Mp3XMMP0SJdbnvl9spgzoiVtMejnjFQqND1Y9DA==","signature_status":"signed_v1","signed_at":"2026-07-05T08:20:15.125456Z","signed_message":"canonical_sha256_bytes"},"source_id":"2405.10667","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a9d6929e29056922953e55fbd7a8bfc666f4db24c94f6886479ccc95a8ccd05f","sha256:9dea85c0147d691320c8b794dfeac1fecf78697d057ee40390d575da04e90aba"],"state_sha256":"a467afd085d70207460964f2b275d0098732c2664b7098c0b9094e5f5d047673"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3Qi6lM56HEEqSAI5tgSIKfG2xL8Zb6Rl02SE9xSkbt4qwOXnVOxU8EqerpypbKy0YZL+UhrUU7uofTZ62zAiDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-13T19:11:42.198966Z","bundle_sha256":"e817b6f3604d7a198d84c9cc7e3c5cf80ca80b7ec5f4afed5dd73c61aec90f4c"}}