{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2004:U35QPVGGXFZN64OQPAYCDGBWDO","short_pith_number":"pith:U35QPVGG","canonical_record":{"source":{"id":"cond-mat/0411755","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat.mes-hall","submitted_at":"2004-11-30T15:29:05Z","cross_cats_sorted":["quant-ph"],"title_canon_sha256":"187c8ea1ced18717a406ff190d722398864e010a0914a4374f41c9a92b5688eb","abstract_canon_sha256":"54394a7d11a1d890727f239988301f6281ae749e730e65e4c3450e623cf50404"},"schema_version":"1.0"},"canonical_sha256":"a6fb07d4c6b972df71d078302198361b91c7b94e7666cb08aee6ef346103acc3","source":{"kind":"arxiv","id":"cond-mat/0411755","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/0411755","created_at":"2026-05-18T01:39:57Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/0411755v1","created_at":"2026-05-18T01:39:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/0411755","created_at":"2026-05-18T01:39:57Z"},{"alias_kind":"pith_short_12","alias_value":"U35QPVGGXFZN","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_16","alias_value":"U35QPVGGXFZN64OQ","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_8","alias_value":"U35QPVGG","created_at":"2026-05-18T12:25:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2004:U35QPVGGXFZN64OQPAYCDGBWDO","target":"record","payload":{"canonical_record":{"source":{"id":"cond-mat/0411755","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat.mes-hall","submitted_at":"2004-11-30T15:29:05Z","cross_cats_sorted":["quant-ph"],"title_canon_sha256":"187c8ea1ced18717a406ff190d722398864e010a0914a4374f41c9a92b5688eb","abstract_canon_sha256":"54394a7d11a1d890727f239988301f6281ae749e730e65e4c3450e623cf50404"},"schema_version":"1.0"},"canonical_sha256":"a6fb07d4c6b972df71d078302198361b91c7b94e7666cb08aee6ef346103acc3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:39:57.283373Z","signature_b64":"GCxXFb7U/3vg+maVSbdE7l5kObUN9AVamWrJkXZwXDIvJRTh8wgc5B+6vVFqr1N5yd0RJp/6+rKa6omcnl1jAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a6fb07d4c6b972df71d078302198361b91c7b94e7666cb08aee6ef346103acc3","last_reissued_at":"2026-05-18T01:39:57.282895Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:39:57.282895Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"cond-mat/0411755","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":"2026-05-18T01:39:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"I1/Od5i50ora7+3uCRLdDVRFEh48Essv4JsQ8Wkeuvi/SY4xPzx6G8+PBQnGl9TcLEj+AeVLf49yPCSVffO4Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T00:32:38.434596Z"},"content_sha256":"86d8cc960ac480edfc906e456ddf9532b1411c7f4809b16ebe0308aa9f486609","schema_version":"1.0","event_id":"sha256:86d8cc960ac480edfc906e456ddf9532b1411c7f4809b16ebe0308aa9f486609"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2004:U35QPVGGXFZN64OQPAYCDGBWDO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spin quantum computation in silicon nanostructures","license":"","headline":"","cross_cats":["quant-ph"],"primary_cat":"cond-mat.mes-hall","authors_text":"Belita Koiller, Rogerio de Sousa, S. Das Sarma, Xuedong Hu","submitted_at":"2004-11-30T15:29:05Z","abstract_excerpt":"Proposed silicon-based quantum-computer architectures have attracted attention because of their promise for scalability and their potential for synergetically utilizing the available resources associated with the existing Si technology infrastructure. Electronic and nuclear spins of shallow donors (e.g. phosphorus) in Si are ideal candidates for qubits in such proposals because of their long spin coherence times due to their limited interactions with their environments. For these spin qubits, shallow donor exchange gates are frequently invoked to perform two-qubit operations. We discuss in thi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/0411755","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":"2026-05-18T01:39:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bcZD0slA4KTgd4rdTWGl1IVjouxBcNaZ989BUDbnlsxmsbW3x7oeIiQZfG6+7oczVwFW8yQr1ayRATxn+WELDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T00:32:38.435394Z"},"content_sha256":"350708c993ccda4f579220a6b24a8f93c5885849539ff0117b1d02fb7e2925f5","schema_version":"1.0","event_id":"sha256:350708c993ccda4f579220a6b24a8f93c5885849539ff0117b1d02fb7e2925f5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/U35QPVGGXFZN64OQPAYCDGBWDO/bundle.json","state_url":"https://pith.science/pith/U35QPVGGXFZN64OQPAYCDGBWDO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/U35QPVGGXFZN64OQPAYCDGBWDO/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":"2026-05-31T00:32:38Z","links":{"resolver":"https://pith.science/pith/U35QPVGGXFZN64OQPAYCDGBWDO","bundle":"https://pith.science/pith/U35QPVGGXFZN64OQPAYCDGBWDO/bundle.json","state":"https://pith.science/pith/U35QPVGGXFZN64OQPAYCDGBWDO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/U35QPVGGXFZN64OQPAYCDGBWDO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2004:U35QPVGGXFZN64OQPAYCDGBWDO","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":"54394a7d11a1d890727f239988301f6281ae749e730e65e4c3450e623cf50404","cross_cats_sorted":["quant-ph"],"license":"","primary_cat":"cond-mat.mes-hall","submitted_at":"2004-11-30T15:29:05Z","title_canon_sha256":"187c8ea1ced18717a406ff190d722398864e010a0914a4374f41c9a92b5688eb"},"schema_version":"1.0","source":{"id":"cond-mat/0411755","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/0411755","created_at":"2026-05-18T01:39:57Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/0411755v1","created_at":"2026-05-18T01:39:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/0411755","created_at":"2026-05-18T01:39:57Z"},{"alias_kind":"pith_short_12","alias_value":"U35QPVGGXFZN","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_16","alias_value":"U35QPVGGXFZN64OQ","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_8","alias_value":"U35QPVGG","created_at":"2026-05-18T12:25:52Z"}],"graph_snapshots":[{"event_id":"sha256:350708c993ccda4f579220a6b24a8f93c5885849539ff0117b1d02fb7e2925f5","target":"graph","created_at":"2026-05-18T01:39:57Z","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":"Proposed silicon-based quantum-computer architectures have attracted attention because of their promise for scalability and their potential for synergetically utilizing the available resources associated with the existing Si technology infrastructure. Electronic and nuclear spins of shallow donors (e.g. phosphorus) in Si are ideal candidates for qubits in such proposals because of their long spin coherence times due to their limited interactions with their environments. For these spin qubits, shallow donor exchange gates are frequently invoked to perform two-qubit operations. We discuss in thi","authors_text":"Belita Koiller, Rogerio de Sousa, S. Das Sarma, Xuedong Hu","cross_cats":["quant-ph"],"headline":"","license":"","primary_cat":"cond-mat.mes-hall","submitted_at":"2004-11-30T15:29:05Z","title":"Spin quantum computation in silicon nanostructures"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/0411755","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":"sha256:86d8cc960ac480edfc906e456ddf9532b1411c7f4809b16ebe0308aa9f486609","target":"record","created_at":"2026-05-18T01:39:57Z","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":"54394a7d11a1d890727f239988301f6281ae749e730e65e4c3450e623cf50404","cross_cats_sorted":["quant-ph"],"license":"","primary_cat":"cond-mat.mes-hall","submitted_at":"2004-11-30T15:29:05Z","title_canon_sha256":"187c8ea1ced18717a406ff190d722398864e010a0914a4374f41c9a92b5688eb"},"schema_version":"1.0","source":{"id":"cond-mat/0411755","kind":"arxiv","version":1}},"canonical_sha256":"a6fb07d4c6b972df71d078302198361b91c7b94e7666cb08aee6ef346103acc3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a6fb07d4c6b972df71d078302198361b91c7b94e7666cb08aee6ef346103acc3","first_computed_at":"2026-05-18T01:39:57.282895Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:39:57.282895Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"GCxXFb7U/3vg+maVSbdE7l5kObUN9AVamWrJkXZwXDIvJRTh8wgc5B+6vVFqr1N5yd0RJp/6+rKa6omcnl1jAg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:39:57.283373Z","signed_message":"canonical_sha256_bytes"},"source_id":"cond-mat/0411755","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:86d8cc960ac480edfc906e456ddf9532b1411c7f4809b16ebe0308aa9f486609","sha256:350708c993ccda4f579220a6b24a8f93c5885849539ff0117b1d02fb7e2925f5"],"state_sha256":"a317fb62ee9c37784adbec31f499a14d48b5d8db39e6f21401bd3452453536f5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mSdatR7tCz9k84j/QjYEwOegYSh//cVYKRk7fEELjEIlubt97ot2Pyh7lv4hMUIt3oiepRt43/sADJqgr6tFBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T00:32:38.439209Z","bundle_sha256":"a19d30fc6c015ac7e2b1542bf972bf4936caf3a7c4038f8f41c72a91f0e7b63c"}}