{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:MOEYA7LQADQNEWQ2OA3TUWPBL5","short_pith_number":"pith:MOEYA7LQ","canonical_record":{"source":{"id":"1207.2784","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-07-11T20:39:49Z","cross_cats_sorted":["cond-mat.mes-hall","quant-ph"],"title_canon_sha256":"c9bf1b90c7d8c60e80759016e70264031caddec61bd7009d471e9ca322d3b9ba","abstract_canon_sha256":"2b4aaaa0746cd267e7679d2e783092916b3dc3f4d0536d5b1b13c4138d39a7c7"},"schema_version":"1.0"},"canonical_sha256":"6389807d7000e0d25a1a70373a59e15f66cad3194b756fba672b9a599b0f69ea","source":{"kind":"arxiv","id":"1207.2784","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1207.2784","created_at":"2026-05-18T03:47:52Z"},{"alias_kind":"arxiv_version","alias_value":"1207.2784v1","created_at":"2026-05-18T03:47:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1207.2784","created_at":"2026-05-18T03:47:52Z"},{"alias_kind":"pith_short_12","alias_value":"MOEYA7LQADQN","created_at":"2026-05-18T12:27:14Z"},{"alias_kind":"pith_short_16","alias_value":"MOEYA7LQADQNEWQ2","created_at":"2026-05-18T12:27:14Z"},{"alias_kind":"pith_short_8","alias_value":"MOEYA7LQ","created_at":"2026-05-18T12:27:14Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:MOEYA7LQADQNEWQ2OA3TUWPBL5","target":"record","payload":{"canonical_record":{"source":{"id":"1207.2784","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-07-11T20:39:49Z","cross_cats_sorted":["cond-mat.mes-hall","quant-ph"],"title_canon_sha256":"c9bf1b90c7d8c60e80759016e70264031caddec61bd7009d471e9ca322d3b9ba","abstract_canon_sha256":"2b4aaaa0746cd267e7679d2e783092916b3dc3f4d0536d5b1b13c4138d39a7c7"},"schema_version":"1.0"},"canonical_sha256":"6389807d7000e0d25a1a70373a59e15f66cad3194b756fba672b9a599b0f69ea","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:47:52.516933Z","signature_b64":"5/NC5NCTqlmNKOc/Jy2lVs2ZHJMaJbsdIFJbjTZ+ziClcFK6xEV0HUji552k7jFeirLb0yZtCC2nIubKvFbXCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6389807d7000e0d25a1a70373a59e15f66cad3194b756fba672b9a599b0f69ea","last_reissued_at":"2026-05-18T03:47:52.516549Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:47:52.516549Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1207.2784","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":"2026-05-18T03:47:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XQ7Gx2A6iFToMkeIJJhdvgE6KxWgUanqCYog8rvesuY+ewKJnL1G0HNDc4M7XSAZjQu6cx/VRTtMf4W2KLthDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T08:13:28.141905Z"},"content_sha256":"8fedb17402aba5a438978586fee7d7d949b079890d2e81ff36f86e87adb1f752","schema_version":"1.0","event_id":"sha256:8fedb17402aba5a438978586fee7d7d949b079890d2e81ff36f86e87adb1f752"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:MOEYA7LQADQNEWQ2OA3TUWPBL5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Engineering shallow spins in diamond with nitrogen delta-doping","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mes-hall","quant-ph"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Ania C. Bleszynski Jayich, Bryan A. Myers, Christopher J. Palmstrom, David D. Awschalom, David M. Toyli, F. Joseph Heremans, Kenichi Ohno, Lee C. Bassett","submitted_at":"2012-07-11T20:39:49Z","abstract_excerpt":"We demonstrate nanometer-precision depth control of nitrogen-vacancy (NV) center creation near the surface of synthetic diamond using an in situ nitrogen delta-doping technique during plasma-enhanced chemical vapor deposition. Despite their proximity to the surface, doped NV centers with depths (d) ranging from 5 - 100 nm display long spin coherence times, T2 > 100 \\mus at d = 5 nm and T2 > 600 \\mus at d \\geq 50 nm. The consistently long spin coherence observed in such shallow NV centers enables applications such as atomic-scale external spin sensing and hybrid quantum architectures."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1207.2784","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":"2026-05-18T03:47:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9jjYpqz2hL5Q6CIc+zAZr0D85M8wHH3wlG9LBqD872+U7XbLViCJdnHEVuy0kOGpmCPR8bSW0lfdR9NDullxBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T08:13:28.142571Z"},"content_sha256":"036c940664df20d02bfbfbbc99a5e179daa053a91d9787231bce06fc5aedc020","schema_version":"1.0","event_id":"sha256:036c940664df20d02bfbfbbc99a5e179daa053a91d9787231bce06fc5aedc020"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MOEYA7LQADQNEWQ2OA3TUWPBL5/bundle.json","state_url":"https://pith.science/pith/MOEYA7LQADQNEWQ2OA3TUWPBL5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MOEYA7LQADQNEWQ2OA3TUWPBL5/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":"2026-05-27T08:13:28Z","links":{"resolver":"https://pith.science/pith/MOEYA7LQADQNEWQ2OA3TUWPBL5","bundle":"https://pith.science/pith/MOEYA7LQADQNEWQ2OA3TUWPBL5/bundle.json","state":"https://pith.science/pith/MOEYA7LQADQNEWQ2OA3TUWPBL5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MOEYA7LQADQNEWQ2OA3TUWPBL5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:MOEYA7LQADQNEWQ2OA3TUWPBL5","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":"2b4aaaa0746cd267e7679d2e783092916b3dc3f4d0536d5b1b13c4138d39a7c7","cross_cats_sorted":["cond-mat.mes-hall","quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-07-11T20:39:49Z","title_canon_sha256":"c9bf1b90c7d8c60e80759016e70264031caddec61bd7009d471e9ca322d3b9ba"},"schema_version":"1.0","source":{"id":"1207.2784","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1207.2784","created_at":"2026-05-18T03:47:52Z"},{"alias_kind":"arxiv_version","alias_value":"1207.2784v1","created_at":"2026-05-18T03:47:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1207.2784","created_at":"2026-05-18T03:47:52Z"},{"alias_kind":"pith_short_12","alias_value":"MOEYA7LQADQN","created_at":"2026-05-18T12:27:14Z"},{"alias_kind":"pith_short_16","alias_value":"MOEYA7LQADQNEWQ2","created_at":"2026-05-18T12:27:14Z"},{"alias_kind":"pith_short_8","alias_value":"MOEYA7LQ","created_at":"2026-05-18T12:27:14Z"}],"graph_snapshots":[{"event_id":"sha256:036c940664df20d02bfbfbbc99a5e179daa053a91d9787231bce06fc5aedc020","target":"graph","created_at":"2026-05-18T03:47:52Z","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":"We demonstrate nanometer-precision depth control of nitrogen-vacancy (NV) center creation near the surface of synthetic diamond using an in situ nitrogen delta-doping technique during plasma-enhanced chemical vapor deposition. Despite their proximity to the surface, doped NV centers with depths (d) ranging from 5 - 100 nm display long spin coherence times, T2 > 100 \\mus at d = 5 nm and T2 > 600 \\mus at d \\geq 50 nm. The consistently long spin coherence observed in such shallow NV centers enables applications such as atomic-scale external spin sensing and hybrid quantum architectures.","authors_text":"Ania C. Bleszynski Jayich, Bryan A. Myers, Christopher J. Palmstrom, David D. Awschalom, David M. Toyli, F. Joseph Heremans, Kenichi Ohno, Lee C. Bassett","cross_cats":["cond-mat.mes-hall","quant-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-07-11T20:39:49Z","title":"Engineering shallow spins in diamond with nitrogen delta-doping"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1207.2784","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":"sha256:8fedb17402aba5a438978586fee7d7d949b079890d2e81ff36f86e87adb1f752","target":"record","created_at":"2026-05-18T03:47:52Z","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":"2b4aaaa0746cd267e7679d2e783092916b3dc3f4d0536d5b1b13c4138d39a7c7","cross_cats_sorted":["cond-mat.mes-hall","quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-07-11T20:39:49Z","title_canon_sha256":"c9bf1b90c7d8c60e80759016e70264031caddec61bd7009d471e9ca322d3b9ba"},"schema_version":"1.0","source":{"id":"1207.2784","kind":"arxiv","version":1}},"canonical_sha256":"6389807d7000e0d25a1a70373a59e15f66cad3194b756fba672b9a599b0f69ea","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6389807d7000e0d25a1a70373a59e15f66cad3194b756fba672b9a599b0f69ea","first_computed_at":"2026-05-18T03:47:52.516549Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:47:52.516549Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"5/NC5NCTqlmNKOc/Jy2lVs2ZHJMaJbsdIFJbjTZ+ziClcFK6xEV0HUji552k7jFeirLb0yZtCC2nIubKvFbXCw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:47:52.516933Z","signed_message":"canonical_sha256_bytes"},"source_id":"1207.2784","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8fedb17402aba5a438978586fee7d7d949b079890d2e81ff36f86e87adb1f752","sha256:036c940664df20d02bfbfbbc99a5e179daa053a91d9787231bce06fc5aedc020"],"state_sha256":"e1374a15defa62693a9e2773204ee823c8356c526138916409d0fc37b820b22c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BjfpHNa771BH7ACEuXGYpWExKlKRoVMnIzGEVKws9RaoYrNFHxByF3XkqvLJ+em9mhldRPKK0Z4RP8YSfC5xDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T08:13:28.146094Z","bundle_sha256":"12a4f0735e85cde329bea1001839a821b66e7bd307b592a7905ee47e43be314d"}}