{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:2GT6ZUUV7ML3ECWYJCCKZEES5J","short_pith_number":"pith:2GT6ZUUV","canonical_record":{"source":{"id":"1508.04191","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-08-18T01:52:58Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"c2a77d8be78b19130b94e984d1679a6ef23fc3a4ca4986578993cf55d6709061","abstract_canon_sha256":"19b81aa78ec1576d39b4793ea536b809503633ee401840efcf580cf405cb25ee"},"schema_version":"1.0"},"canonical_sha256":"d1a7ecd295fb17b20ad84884ac9092ea5c8c6f02d7382fc6cdee279d53835da0","source":{"kind":"arxiv","id":"1508.04191","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1508.04191","created_at":"2026-05-18T01:21:31Z"},{"alias_kind":"arxiv_version","alias_value":"1508.04191v1","created_at":"2026-05-18T01:21:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.04191","created_at":"2026-05-18T01:21:31Z"},{"alias_kind":"pith_short_12","alias_value":"2GT6ZUUV7ML3","created_at":"2026-05-18T12:28:59Z"},{"alias_kind":"pith_short_16","alias_value":"2GT6ZUUV7ML3ECWY","created_at":"2026-05-18T12:28:59Z"},{"alias_kind":"pith_short_8","alias_value":"2GT6ZUUV","created_at":"2026-05-18T12:28:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:2GT6ZUUV7ML3ECWYJCCKZEES5J","target":"record","payload":{"canonical_record":{"source":{"id":"1508.04191","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-08-18T01:52:58Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"c2a77d8be78b19130b94e984d1679a6ef23fc3a4ca4986578993cf55d6709061","abstract_canon_sha256":"19b81aa78ec1576d39b4793ea536b809503633ee401840efcf580cf405cb25ee"},"schema_version":"1.0"},"canonical_sha256":"d1a7ecd295fb17b20ad84884ac9092ea5c8c6f02d7382fc6cdee279d53835da0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:21:31.505303Z","signature_b64":"2QeaP36n/OjCaj/I8dhfWWK2f025S0txLI98bBi+QngxaWkoojFvHu1Fp3wd5dyuaTmHjb4aV/qLat1FlcS7Aw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d1a7ecd295fb17b20ad84884ac9092ea5c8c6f02d7382fc6cdee279d53835da0","last_reissued_at":"2026-05-18T01:21:31.504743Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:21:31.504743Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1508.04191","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":"2026-05-18T01:21:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9yJayBzFDKV7belunE7qAP3VVgqA5FhIryDscd0bbeOglJkawLTECbjW+2DqRoZ9njzBd70dciAB0zns+uT+Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T17:59:37.727962Z"},"content_sha256":"95dff626cf55d2ce4aec2a91103a8612c842285a97969e08d2b129cd2fcfe2bc","schema_version":"1.0","event_id":"sha256:95dff626cf55d2ce4aec2a91103a8612c842285a97969e08d2b129cd2fcfe2bc"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:2GT6ZUUV7ML3ECWYJCCKZEES5J","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"NMR Technique for Determining the Depth of Shallow Nitrogen-Vacancy Centers in Diamond","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mes-hall"],"primary_cat":"quant-ph","authors_text":"Alexander O. Sushkov, Amir Yacoby, Elana Urbach, Eric Bersin, Francesco Casola, Hongkun Park, Igor Lovchinsky, Junghyun Lee, Linh M. Pham, Mikhail Lukin, Paola Cappellaro, Ronald L. Walsworth, Stephen J. DeVience","submitted_at":"2015-08-18T01:52:58Z","abstract_excerpt":"We demonstrate a robust experimental method for determining the depth of individual shallow Nitrogen-Vacancy (NV) centers in diamond with $\\sim1$ nm uncertainty. We use a confocal microscope to observe single NV centers and detect the proton nuclear magnetic resonance (NMR) signal produced by objective immersion oil, which has well understood nuclear spin properties, on the diamond surface. We determine the NV center depth by analyzing the NV NMR data using a model that describes the interaction of a single NV center with the statistically-polarized proton spin bath. We repeat this procedure f"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.04191","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":"2026-05-18T01:21:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ddHUodn83W+9rHcrXkGVnPrjLL/Q8rKzRfbWJlMX4N+MnZ602l/YtwUmwjEriv+7Aii3/khXEKcREjjWd/HlBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T17:59:37.728326Z"},"content_sha256":"5b6598e843d36d7bb8d6f54134a5d9382d47779291a4ffe110863f8e3aedb040","schema_version":"1.0","event_id":"sha256:5b6598e843d36d7bb8d6f54134a5d9382d47779291a4ffe110863f8e3aedb040"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2GT6ZUUV7ML3ECWYJCCKZEES5J/bundle.json","state_url":"https://pith.science/pith/2GT6ZUUV7ML3ECWYJCCKZEES5J/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2GT6ZUUV7ML3ECWYJCCKZEES5J/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":"2026-06-03T17:59:37Z","links":{"resolver":"https://pith.science/pith/2GT6ZUUV7ML3ECWYJCCKZEES5J","bundle":"https://pith.science/pith/2GT6ZUUV7ML3ECWYJCCKZEES5J/bundle.json","state":"https://pith.science/pith/2GT6ZUUV7ML3ECWYJCCKZEES5J/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2GT6ZUUV7ML3ECWYJCCKZEES5J/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:2GT6ZUUV7ML3ECWYJCCKZEES5J","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":"19b81aa78ec1576d39b4793ea536b809503633ee401840efcf580cf405cb25ee","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-08-18T01:52:58Z","title_canon_sha256":"c2a77d8be78b19130b94e984d1679a6ef23fc3a4ca4986578993cf55d6709061"},"schema_version":"1.0","source":{"id":"1508.04191","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1508.04191","created_at":"2026-05-18T01:21:31Z"},{"alias_kind":"arxiv_version","alias_value":"1508.04191v1","created_at":"2026-05-18T01:21:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.04191","created_at":"2026-05-18T01:21:31Z"},{"alias_kind":"pith_short_12","alias_value":"2GT6ZUUV7ML3","created_at":"2026-05-18T12:28:59Z"},{"alias_kind":"pith_short_16","alias_value":"2GT6ZUUV7ML3ECWY","created_at":"2026-05-18T12:28:59Z"},{"alias_kind":"pith_short_8","alias_value":"2GT6ZUUV","created_at":"2026-05-18T12:28:59Z"}],"graph_snapshots":[{"event_id":"sha256:5b6598e843d36d7bb8d6f54134a5d9382d47779291a4ffe110863f8e3aedb040","target":"graph","created_at":"2026-05-18T01:21:31Z","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 a robust experimental method for determining the depth of individual shallow Nitrogen-Vacancy (NV) centers in diamond with $\\sim1$ nm uncertainty. We use a confocal microscope to observe single NV centers and detect the proton nuclear magnetic resonance (NMR) signal produced by objective immersion oil, which has well understood nuclear spin properties, on the diamond surface. We determine the NV center depth by analyzing the NV NMR data using a model that describes the interaction of a single NV center with the statistically-polarized proton spin bath. We repeat this procedure f","authors_text":"Alexander O. Sushkov, Amir Yacoby, Elana Urbach, Eric Bersin, Francesco Casola, Hongkun Park, Igor Lovchinsky, Junghyun Lee, Linh M. Pham, Mikhail Lukin, Paola Cappellaro, Ronald L. Walsworth, Stephen J. DeVience","cross_cats":["cond-mat.mes-hall"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-08-18T01:52:58Z","title":"NMR Technique for Determining the Depth of Shallow Nitrogen-Vacancy Centers in Diamond"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.04191","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":"sha256:95dff626cf55d2ce4aec2a91103a8612c842285a97969e08d2b129cd2fcfe2bc","target":"record","created_at":"2026-05-18T01:21:31Z","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":"19b81aa78ec1576d39b4793ea536b809503633ee401840efcf580cf405cb25ee","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-08-18T01:52:58Z","title_canon_sha256":"c2a77d8be78b19130b94e984d1679a6ef23fc3a4ca4986578993cf55d6709061"},"schema_version":"1.0","source":{"id":"1508.04191","kind":"arxiv","version":1}},"canonical_sha256":"d1a7ecd295fb17b20ad84884ac9092ea5c8c6f02d7382fc6cdee279d53835da0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d1a7ecd295fb17b20ad84884ac9092ea5c8c6f02d7382fc6cdee279d53835da0","first_computed_at":"2026-05-18T01:21:31.504743Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:21:31.504743Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2QeaP36n/OjCaj/I8dhfWWK2f025S0txLI98bBi+QngxaWkoojFvHu1Fp3wd5dyuaTmHjb4aV/qLat1FlcS7Aw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:21:31.505303Z","signed_message":"canonical_sha256_bytes"},"source_id":"1508.04191","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:95dff626cf55d2ce4aec2a91103a8612c842285a97969e08d2b129cd2fcfe2bc","sha256:5b6598e843d36d7bb8d6f54134a5d9382d47779291a4ffe110863f8e3aedb040"],"state_sha256":"7524600605a9057ae5646641c7f5febf0b20382bdb67e62b851593d975b74511"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"b0PkGiKD8K4SwBgw2TNJnxvhg1vOum3+s3CO/1+BHpt5fAVGy8D3pMAwbXfaRMqsE0aHRIbCeMVvOULLO3vVCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T17:59:37.730265Z","bundle_sha256":"9455e4b5c78f60f82d3c83ef8e03e806e9d26c9c718d0033035ec838c0de545d"}}