{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:JJE6BDMHC7ZB4GF5AQNQ2OPSNR","short_pith_number":"pith:JJE6BDMH","canonical_record":{"source":{"id":"2302.10560","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2023-02-21T09:35:55Z","cross_cats_sorted":[],"title_canon_sha256":"ac4d84fa4fb8b64ded3fac28b7785c52f76a325cae2251ddf9c9a6e8dc51af0d","abstract_canon_sha256":"8ef22493be9876bfed2cb5e48087f27531bbe5a672f2465897b0d24aad781931"},"schema_version":"1.0"},"canonical_sha256":"4a49e08d8717f21e18bd041b0d39f26c41519137742d9cdc6d06c542afae43df","source":{"kind":"arxiv","id":"2302.10560","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2302.10560","created_at":"2026-07-05T06:35:48Z"},{"alias_kind":"arxiv_version","alias_value":"2302.10560v1","created_at":"2026-07-05T06:35:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2302.10560","created_at":"2026-07-05T06:35:48Z"},{"alias_kind":"pith_short_12","alias_value":"JJE6BDMHC7ZB","created_at":"2026-07-05T06:35:48Z"},{"alias_kind":"pith_short_16","alias_value":"JJE6BDMHC7ZB4GF5","created_at":"2026-07-05T06:35:48Z"},{"alias_kind":"pith_short_8","alias_value":"JJE6BDMH","created_at":"2026-07-05T06:35:48Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:JJE6BDMHC7ZB4GF5AQNQ2OPSNR","target":"record","payload":{"canonical_record":{"source":{"id":"2302.10560","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2023-02-21T09:35:55Z","cross_cats_sorted":[],"title_canon_sha256":"ac4d84fa4fb8b64ded3fac28b7785c52f76a325cae2251ddf9c9a6e8dc51af0d","abstract_canon_sha256":"8ef22493be9876bfed2cb5e48087f27531bbe5a672f2465897b0d24aad781931"},"schema_version":"1.0"},"canonical_sha256":"4a49e08d8717f21e18bd041b0d39f26c41519137742d9cdc6d06c542afae43df","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T06:35:48.568913Z","signature_b64":"bsrKwK+1HXQu/yw2vnytnyhn7oavXnxlDqZTuPsX+Ba8qTUPkS9i8FlXn4OyichWYmLXWTYRElfFPI53mE0nCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4a49e08d8717f21e18bd041b0d39f26c41519137742d9cdc6d06c542afae43df","last_reissued_at":"2026-07-05T06:35:48.568481Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T06:35:48.568481Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2302.10560","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":"2026-07-05T06:35:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"m7LAJMfzAXIshUHKxxVoqhhqcD1XJUthDGGzOdrHsvnFLDGiH+rVTl15Y36uzjMmixuME3QXC7k1b2y4PvW7Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-31T13:27:26.166936Z"},"content_sha256":"e36bdc68a71d79f81689c6edab0cceaa967bf9203b14d1dab2cbff05aee5312f","schema_version":"1.0","event_id":"sha256:e36bdc68a71d79f81689c6edab0cceaa967bf9203b14d1dab2cbff05aee5312f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:JJE6BDMHC7ZB4GF5AQNQ2OPSNR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Detection of paramagnetic spins with an ultrathin van der Waals quantum sensor","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"Alexander J. Healey, Fernando Meneses, Hiroshi Abe, Igor Aharonovich, Islay O. Robertson, Jean-Philippe Tetienne, Mehran Kianinia, Philipp Reineck, Priya Singh, Sam C. Scholten, Takeshi Ohshima","submitted_at":"2023-02-21T09:35:55Z","abstract_excerpt":"Detecting magnetic noise from small quantities of paramagnetic spins is a powerful capability for chemical, biochemical, and medical analysis. Quantum sensors based on optically addressable spin defects in bulk semiconductors are typically employed for such purposes, but the 3D crystal structure of the sensor inhibits the sensitivity by limiting the proximity of the defects to the target spins. Here we demonstrate the detection of paramagnetic spins using spin defects hosted in hexagonal boron nitride (hBN), a van der Waals material which can be exfoliated into the 2D regime. We first create n"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2302.10560","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/2302.10560/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":"2026-07-05T06:35:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ASxreS7WalyurO2/ny6vHwQ5ar8UKNejbjuBJWnAbnR6lSoUX/3LhPTa2BuY0tN8sKuCFPoKEVjCPFZ8c447BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-31T13:27:26.167427Z"},"content_sha256":"625f70eaf15a5c36331a8df2ea1d3ae883d0c9ecd80d08575d4ce9f9757ab231","schema_version":"1.0","event_id":"sha256:625f70eaf15a5c36331a8df2ea1d3ae883d0c9ecd80d08575d4ce9f9757ab231"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JJE6BDMHC7ZB4GF5AQNQ2OPSNR/bundle.json","state_url":"https://pith.science/pith/JJE6BDMHC7ZB4GF5AQNQ2OPSNR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JJE6BDMHC7ZB4GF5AQNQ2OPSNR/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":"2026-07-31T13:27:26Z","links":{"resolver":"https://pith.science/pith/JJE6BDMHC7ZB4GF5AQNQ2OPSNR","bundle":"https://pith.science/pith/JJE6BDMHC7ZB4GF5AQNQ2OPSNR/bundle.json","state":"https://pith.science/pith/JJE6BDMHC7ZB4GF5AQNQ2OPSNR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JJE6BDMHC7ZB4GF5AQNQ2OPSNR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:JJE6BDMHC7ZB4GF5AQNQ2OPSNR","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":"8ef22493be9876bfed2cb5e48087f27531bbe5a672f2465897b0d24aad781931","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2023-02-21T09:35:55Z","title_canon_sha256":"ac4d84fa4fb8b64ded3fac28b7785c52f76a325cae2251ddf9c9a6e8dc51af0d"},"schema_version":"1.0","source":{"id":"2302.10560","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2302.10560","created_at":"2026-07-05T06:35:48Z"},{"alias_kind":"arxiv_version","alias_value":"2302.10560v1","created_at":"2026-07-05T06:35:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2302.10560","created_at":"2026-07-05T06:35:48Z"},{"alias_kind":"pith_short_12","alias_value":"JJE6BDMHC7ZB","created_at":"2026-07-05T06:35:48Z"},{"alias_kind":"pith_short_16","alias_value":"JJE6BDMHC7ZB4GF5","created_at":"2026-07-05T06:35:48Z"},{"alias_kind":"pith_short_8","alias_value":"JJE6BDMH","created_at":"2026-07-05T06:35:48Z"}],"graph_snapshots":[{"event_id":"sha256:625f70eaf15a5c36331a8df2ea1d3ae883d0c9ecd80d08575d4ce9f9757ab231","target":"graph","created_at":"2026-07-05T06:35:48Z","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/2302.10560/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Detecting magnetic noise from small quantities of paramagnetic spins is a powerful capability for chemical, biochemical, and medical analysis. Quantum sensors based on optically addressable spin defects in bulk semiconductors are typically employed for such purposes, but the 3D crystal structure of the sensor inhibits the sensitivity by limiting the proximity of the defects to the target spins. Here we demonstrate the detection of paramagnetic spins using spin defects hosted in hexagonal boron nitride (hBN), a van der Waals material which can be exfoliated into the 2D regime. We first create n","authors_text":"Alexander J. Healey, Fernando Meneses, Hiroshi Abe, Igor Aharonovich, Islay O. Robertson, Jean-Philippe Tetienne, Mehran Kianinia, Philipp Reineck, Priya Singh, Sam C. Scholten, Takeshi Ohshima","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2023-02-21T09:35:55Z","title":"Detection of paramagnetic spins with an ultrathin van der Waals quantum sensor"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2302.10560","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:e36bdc68a71d79f81689c6edab0cceaa967bf9203b14d1dab2cbff05aee5312f","target":"record","created_at":"2026-07-05T06:35:48Z","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":"8ef22493be9876bfed2cb5e48087f27531bbe5a672f2465897b0d24aad781931","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2023-02-21T09:35:55Z","title_canon_sha256":"ac4d84fa4fb8b64ded3fac28b7785c52f76a325cae2251ddf9c9a6e8dc51af0d"},"schema_version":"1.0","source":{"id":"2302.10560","kind":"arxiv","version":1}},"canonical_sha256":"4a49e08d8717f21e18bd041b0d39f26c41519137742d9cdc6d06c542afae43df","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4a49e08d8717f21e18bd041b0d39f26c41519137742d9cdc6d06c542afae43df","first_computed_at":"2026-07-05T06:35:48.568481Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T06:35:48.568481Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"bsrKwK+1HXQu/yw2vnytnyhn7oavXnxlDqZTuPsX+Ba8qTUPkS9i8FlXn4OyichWYmLXWTYRElfFPI53mE0nCA==","signature_status":"signed_v1","signed_at":"2026-07-05T06:35:48.568913Z","signed_message":"canonical_sha256_bytes"},"source_id":"2302.10560","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e36bdc68a71d79f81689c6edab0cceaa967bf9203b14d1dab2cbff05aee5312f","sha256:625f70eaf15a5c36331a8df2ea1d3ae883d0c9ecd80d08575d4ce9f9757ab231"],"state_sha256":"81c460eb08ff5239493d4fa9b13a6f9ded5d7f717454ae5c3b9dfeb720796dc6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"q9H3fowx9FkNjWN/6KMnNL+f5VVUTEIou8HL8EzVscH5GVpULWsw7XvLckghZGkdqhMzTrOeh4N4Dk4Q8k62BQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-31T13:27:26.172685Z","bundle_sha256":"47169ac1cee8c85690a15ba70dba7eda6f46e98cf5de320794e578718adcb0c0"}}