{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:YQJMO7AS76FZKKR4NX3ZIHDIAS","short_pith_number":"pith:YQJMO7AS","canonical_record":{"source":{"id":"1405.5837","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2014-05-22T17:46:56Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"9a66097d8bf420a1fcd4c19cfaaf9f80d6712150d2f7ea1cc0b779e3e15573ba","abstract_canon_sha256":"71bd58cc58dd7c34fb4cb30b8fc27837524a2db42fe2b12015fccf16d1abd44a"},"schema_version":"1.0"},"canonical_sha256":"c412c77c12ff8b952a3c6df7941c6804bbb132a4e5676f14d8752bb1bdcc4c37","source":{"kind":"arxiv","id":"1405.5837","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1405.5837","created_at":"2026-05-18T02:43:35Z"},{"alias_kind":"arxiv_version","alias_value":"1405.5837v2","created_at":"2026-05-18T02:43:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1405.5837","created_at":"2026-05-18T02:43:35Z"},{"alias_kind":"pith_short_12","alias_value":"YQJMO7AS76FZ","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_16","alias_value":"YQJMO7AS76FZKKR4","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_8","alias_value":"YQJMO7AS","created_at":"2026-05-18T12:28:57Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:YQJMO7AS76FZKKR4NX3ZIHDIAS","target":"record","payload":{"canonical_record":{"source":{"id":"1405.5837","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2014-05-22T17:46:56Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"9a66097d8bf420a1fcd4c19cfaaf9f80d6712150d2f7ea1cc0b779e3e15573ba","abstract_canon_sha256":"71bd58cc58dd7c34fb4cb30b8fc27837524a2db42fe2b12015fccf16d1abd44a"},"schema_version":"1.0"},"canonical_sha256":"c412c77c12ff8b952a3c6df7941c6804bbb132a4e5676f14d8752bb1bdcc4c37","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:43:35.442623Z","signature_b64":"EOyU02T7VXxCfVO6i9IL4IgrryGtttuu2qYsacJdhfZiv3Ei/nNgegPn4k2o94dnH8IelbTKI5zCmgVedoWfDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c412c77c12ff8b952a3c6df7941c6804bbb132a4e5676f14d8752bb1bdcc4c37","last_reissued_at":"2026-05-18T02:43:35.442111Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:43:35.442111Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1405.5837","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:43:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZxFLdOQ1LUczpY5eU1TO6FCTca21nySoOlnVCm71Pudog/L5lB57783OcyxICOoy/u6bZL0+k04h6yTdPTiBBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T15:56:13.299722Z"},"content_sha256":"f73231ac58126510cae2a5a0c30bdf01d4a24c6fac678dff38c7468e00840e58","schema_version":"1.0","event_id":"sha256:f73231ac58126510cae2a5a0c30bdf01d4a24c6fac678dff38c7468e00840e58"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:YQJMO7AS76FZKKR4NX3ZIHDIAS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Isotopic identification of engineered nitrogen-vacancy spin qubits in ultrapure diamond","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"cond-mat.mes-hall","authors_text":"B. Naydenov, C. M\\\"uller, D. J. Twitchen, F. Dolde, F. Jelezko, H. Fedder, J. Honert, J. Isoya, J. Wrachtrup, K. Watanabe, L. P. McGuinness, M. L. Markham, S. Koizumi, S. Onoda, T. Ohshima, T. Teraji, T. Umeda, T. Yamamoto","submitted_at":"2014-05-22T17:46:56Z","abstract_excerpt":"Nitrogen impurities help to stabilize the negatively-charged-state of NV$^-$ in diamond, whereas magnetic fluctuations from nitrogen spins lead to decoherence of NV$^-$ qubits. It is not known what donor concentration optimizes these conflicting requirements. Here we used 10-MeV $^{15}$N$^{3+}$ ion implantation to create NV$^-$ in ultrapure diamond. Optically detected magnetic resonance of single centers revealed a high creation yield of $40\\pm3$% from $^{15}$N$^{3+}$ ions and an additional yield of $56\\pm3$% from $^{14}$N impurities. High-temperature anneal was used to reduce residual defects"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1405.5837","kind":"arxiv","version":2},"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":"2026-05-18T02:43:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"D5dezk109eqnH4OtLUJ96RGBGSRYOw85woSRsQrmulFa1Aa9cFdb/usbmFwhYThY9yYaV2uREoov4w3JvWY1Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T15:56:13.300080Z"},"content_sha256":"f9ff5eefe206174d7e638b5bed12cdddf002d5a076519fda4d9545bf61c06c01","schema_version":"1.0","event_id":"sha256:f9ff5eefe206174d7e638b5bed12cdddf002d5a076519fda4d9545bf61c06c01"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YQJMO7AS76FZKKR4NX3ZIHDIAS/bundle.json","state_url":"https://pith.science/pith/YQJMO7AS76FZKKR4NX3ZIHDIAS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YQJMO7AS76FZKKR4NX3ZIHDIAS/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":"2026-06-02T15:56:13Z","links":{"resolver":"https://pith.science/pith/YQJMO7AS76FZKKR4NX3ZIHDIAS","bundle":"https://pith.science/pith/YQJMO7AS76FZKKR4NX3ZIHDIAS/bundle.json","state":"https://pith.science/pith/YQJMO7AS76FZKKR4NX3ZIHDIAS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YQJMO7AS76FZKKR4NX3ZIHDIAS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:YQJMO7AS76FZKKR4NX3ZIHDIAS","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":"71bd58cc58dd7c34fb4cb30b8fc27837524a2db42fe2b12015fccf16d1abd44a","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2014-05-22T17:46:56Z","title_canon_sha256":"9a66097d8bf420a1fcd4c19cfaaf9f80d6712150d2f7ea1cc0b779e3e15573ba"},"schema_version":"1.0","source":{"id":"1405.5837","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1405.5837","created_at":"2026-05-18T02:43:35Z"},{"alias_kind":"arxiv_version","alias_value":"1405.5837v2","created_at":"2026-05-18T02:43:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1405.5837","created_at":"2026-05-18T02:43:35Z"},{"alias_kind":"pith_short_12","alias_value":"YQJMO7AS76FZ","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_16","alias_value":"YQJMO7AS76FZKKR4","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_8","alias_value":"YQJMO7AS","created_at":"2026-05-18T12:28:57Z"}],"graph_snapshots":[{"event_id":"sha256:f9ff5eefe206174d7e638b5bed12cdddf002d5a076519fda4d9545bf61c06c01","target":"graph","created_at":"2026-05-18T02:43:35Z","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":"Nitrogen impurities help to stabilize the negatively-charged-state of NV$^-$ in diamond, whereas magnetic fluctuations from nitrogen spins lead to decoherence of NV$^-$ qubits. It is not known what donor concentration optimizes these conflicting requirements. Here we used 10-MeV $^{15}$N$^{3+}$ ion implantation to create NV$^-$ in ultrapure diamond. Optically detected magnetic resonance of single centers revealed a high creation yield of $40\\pm3$% from $^{15}$N$^{3+}$ ions and an additional yield of $56\\pm3$% from $^{14}$N impurities. High-temperature anneal was used to reduce residual defects","authors_text":"B. Naydenov, C. M\\\"uller, D. J. Twitchen, F. Dolde, F. Jelezko, H. Fedder, J. Honert, J. Isoya, J. Wrachtrup, K. Watanabe, L. P. McGuinness, M. L. Markham, S. Koizumi, S. Onoda, T. Ohshima, T. Teraji, T. Umeda, T. Yamamoto","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2014-05-22T17:46:56Z","title":"Isotopic identification of engineered nitrogen-vacancy spin qubits in ultrapure diamond"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1405.5837","kind":"arxiv","version":2},"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:f73231ac58126510cae2a5a0c30bdf01d4a24c6fac678dff38c7468e00840e58","target":"record","created_at":"2026-05-18T02:43:35Z","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":"71bd58cc58dd7c34fb4cb30b8fc27837524a2db42fe2b12015fccf16d1abd44a","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2014-05-22T17:46:56Z","title_canon_sha256":"9a66097d8bf420a1fcd4c19cfaaf9f80d6712150d2f7ea1cc0b779e3e15573ba"},"schema_version":"1.0","source":{"id":"1405.5837","kind":"arxiv","version":2}},"canonical_sha256":"c412c77c12ff8b952a3c6df7941c6804bbb132a4e5676f14d8752bb1bdcc4c37","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c412c77c12ff8b952a3c6df7941c6804bbb132a4e5676f14d8752bb1bdcc4c37","first_computed_at":"2026-05-18T02:43:35.442111Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:43:35.442111Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"EOyU02T7VXxCfVO6i9IL4IgrryGtttuu2qYsacJdhfZiv3Ei/nNgegPn4k2o94dnH8IelbTKI5zCmgVedoWfDA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:43:35.442623Z","signed_message":"canonical_sha256_bytes"},"source_id":"1405.5837","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f73231ac58126510cae2a5a0c30bdf01d4a24c6fac678dff38c7468e00840e58","sha256:f9ff5eefe206174d7e638b5bed12cdddf002d5a076519fda4d9545bf61c06c01"],"state_sha256":"42bb4c96560bfcbeeb8d8ee7ffddcf06ad9bfb24d7d2308c46aedd8736875b9d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"o7BIpnuBs5E2v2xA28rgxz6rlStaHXayqkSch8rYZhLVs3gVu7IjTDhJIPL+0Ex/Cp56ujLQpkO13w/dRySLAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T15:56:13.302075Z","bundle_sha256":"eb4865b7d199d6bceeaa45a7d9f392dbf02f403deaf957196b0326e3d596f694"}}