{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:O54ZLYCDTUAGP577UOFWB6JCLM","short_pith_number":"pith:O54ZLYCD","canonical_record":{"source":{"id":"2507.00215","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2025-06-30T19:35:06Z","cross_cats_sorted":["cond-mat.mes-hall","physics.app-ph","physics.optics","quant-ph"],"title_canon_sha256":"a14e7573fc9cc9b2399a3cfd89dcb0900bf7d51179b7c2d0de7a6998fb615040","abstract_canon_sha256":"38dca14a46488a5d2efb012551d1beb6cbe8f2148e09b451014e10af5b6c6da7"},"schema_version":"1.0"},"canonical_sha256":"777995e0439d0067f7ffa38b60f9225b1cf35dc0dffa94110a653b5696083dd7","source":{"kind":"arxiv","id":"2507.00215","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2507.00215","created_at":"2026-07-05T11:29:39Z"},{"alias_kind":"arxiv_version","alias_value":"2507.00215v1","created_at":"2026-07-05T11:29:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2507.00215","created_at":"2026-07-05T11:29:39Z"},{"alias_kind":"pith_short_12","alias_value":"O54ZLYCDTUAG","created_at":"2026-07-05T11:29:39Z"},{"alias_kind":"pith_short_16","alias_value":"O54ZLYCDTUAGP577","created_at":"2026-07-05T11:29:39Z"},{"alias_kind":"pith_short_8","alias_value":"O54ZLYCD","created_at":"2026-07-05T11:29:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:O54ZLYCDTUAGP577UOFWB6JCLM","target":"record","payload":{"canonical_record":{"source":{"id":"2507.00215","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2025-06-30T19:35:06Z","cross_cats_sorted":["cond-mat.mes-hall","physics.app-ph","physics.optics","quant-ph"],"title_canon_sha256":"a14e7573fc9cc9b2399a3cfd89dcb0900bf7d51179b7c2d0de7a6998fb615040","abstract_canon_sha256":"38dca14a46488a5d2efb012551d1beb6cbe8f2148e09b451014e10af5b6c6da7"},"schema_version":"1.0"},"canonical_sha256":"777995e0439d0067f7ffa38b60f9225b1cf35dc0dffa94110a653b5696083dd7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:29:39.357375Z","signature_b64":"Zp05lHErkgN7AsWXYGOrZZQKMuhp6aStf6gTBSZmR9R5qRIfN13bnTk9QJeUBYr5guRT68s+rmZuoEByt9mFBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"777995e0439d0067f7ffa38b60f9225b1cf35dc0dffa94110a653b5696083dd7","last_reissued_at":"2026-07-05T11:29:39.356814Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:29:39.356814Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2507.00215","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":"2026-07-05T11:29:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DKV/KHMTCIourNvFW4SrWWfeIs1q2JEO+xTdCVqaRJZx/k9h8ND4UuLrT4CpZMpq+Kj0dDKh/u3wddgkQtKtBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T15:01:40.662198Z"},"content_sha256":"98273324da02de87cb06868a4d8e14f48b614da0714e2061b1dfde896ee8e22f","schema_version":"1.0","event_id":"sha256:98273324da02de87cb06868a4d8e14f48b614da0714e2061b1dfde896ee8e22f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:O54ZLYCDTUAGP577UOFWB6JCLM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Earth's field diamond vector magnetometry with isotropic magnetic flux concentrators","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mes-hall","physics.app-ph","physics.optics","quant-ph"],"primary_cat":"physics.ins-det","authors_text":"Andrey Jarmola, Andris Berzins, Bryan A. Richards, Ilja Fescenko, Janis Smits, Keith A. Lidke, Maxwell D. Aiello, Maziar Saleh Ziabari, Nazanin Mosavian, Victor M. Acosta, Yaser Silani","submitted_at":"2025-06-30T19:35:06Z","abstract_excerpt":"Vector magnetometers based on the optically detected magnetic resonance (ODMR) of nitrogen-vacancy centers in diamond are being developed for applications such as navigation and geomagnetism. However, at low magnetic fields, such as that on Earth (~50 {\\mu}T), diamond magnetometers suffer from spectral congestion whereby ODMR peaks are not easily resolved. Here, we experimentally investigate a potential solution of using an isotropic, three-dimensional magnetic flux concentrator to amplify Earth's field without altering its direction. The concentrator consists of six ferrite cones, in a face-c"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2507.00215","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/2507.00215/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":"2026-07-05T11:29:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WmEOosVQjQ+pBFBlt8V4tT/acmxGNlMShV9j8nRs1g0gDminTd/HUa5BB6nK6y4HKOaDR6BKvehhGUIxQnYDCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T15:01:40.662702Z"},"content_sha256":"5fb8b0687e3d5a70b560d2fda4a061e1441c27636bd4884926b3284547c6ef93","schema_version":"1.0","event_id":"sha256:5fb8b0687e3d5a70b560d2fda4a061e1441c27636bd4884926b3284547c6ef93"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/O54ZLYCDTUAGP577UOFWB6JCLM/bundle.json","state_url":"https://pith.science/pith/O54ZLYCDTUAGP577UOFWB6JCLM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/O54ZLYCDTUAGP577UOFWB6JCLM/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":"2026-08-04T15:01:40Z","links":{"resolver":"https://pith.science/pith/O54ZLYCDTUAGP577UOFWB6JCLM","bundle":"https://pith.science/pith/O54ZLYCDTUAGP577UOFWB6JCLM/bundle.json","state":"https://pith.science/pith/O54ZLYCDTUAGP577UOFWB6JCLM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/O54ZLYCDTUAGP577UOFWB6JCLM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:O54ZLYCDTUAGP577UOFWB6JCLM","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":"38dca14a46488a5d2efb012551d1beb6cbe8f2148e09b451014e10af5b6c6da7","cross_cats_sorted":["cond-mat.mes-hall","physics.app-ph","physics.optics","quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2025-06-30T19:35:06Z","title_canon_sha256":"a14e7573fc9cc9b2399a3cfd89dcb0900bf7d51179b7c2d0de7a6998fb615040"},"schema_version":"1.0","source":{"id":"2507.00215","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2507.00215","created_at":"2026-07-05T11:29:39Z"},{"alias_kind":"arxiv_version","alias_value":"2507.00215v1","created_at":"2026-07-05T11:29:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2507.00215","created_at":"2026-07-05T11:29:39Z"},{"alias_kind":"pith_short_12","alias_value":"O54ZLYCDTUAG","created_at":"2026-07-05T11:29:39Z"},{"alias_kind":"pith_short_16","alias_value":"O54ZLYCDTUAGP577","created_at":"2026-07-05T11:29:39Z"},{"alias_kind":"pith_short_8","alias_value":"O54ZLYCD","created_at":"2026-07-05T11:29:39Z"}],"graph_snapshots":[{"event_id":"sha256:5fb8b0687e3d5a70b560d2fda4a061e1441c27636bd4884926b3284547c6ef93","target":"graph","created_at":"2026-07-05T11:29:39Z","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/2507.00215/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Vector magnetometers based on the optically detected magnetic resonance (ODMR) of nitrogen-vacancy centers in diamond are being developed for applications such as navigation and geomagnetism. However, at low magnetic fields, such as that on Earth (~50 {\\mu}T), diamond magnetometers suffer from spectral congestion whereby ODMR peaks are not easily resolved. Here, we experimentally investigate a potential solution of using an isotropic, three-dimensional magnetic flux concentrator to amplify Earth's field without altering its direction. The concentrator consists of six ferrite cones, in a face-c","authors_text":"Andrey Jarmola, Andris Berzins, Bryan A. Richards, Ilja Fescenko, Janis Smits, Keith A. Lidke, Maxwell D. Aiello, Maziar Saleh Ziabari, Nazanin Mosavian, Victor M. Acosta, Yaser Silani","cross_cats":["cond-mat.mes-hall","physics.app-ph","physics.optics","quant-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2025-06-30T19:35:06Z","title":"Earth's field diamond vector magnetometry with isotropic magnetic flux concentrators"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2507.00215","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":"sha256:98273324da02de87cb06868a4d8e14f48b614da0714e2061b1dfde896ee8e22f","target":"record","created_at":"2026-07-05T11:29:39Z","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":"38dca14a46488a5d2efb012551d1beb6cbe8f2148e09b451014e10af5b6c6da7","cross_cats_sorted":["cond-mat.mes-hall","physics.app-ph","physics.optics","quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2025-06-30T19:35:06Z","title_canon_sha256":"a14e7573fc9cc9b2399a3cfd89dcb0900bf7d51179b7c2d0de7a6998fb615040"},"schema_version":"1.0","source":{"id":"2507.00215","kind":"arxiv","version":1}},"canonical_sha256":"777995e0439d0067f7ffa38b60f9225b1cf35dc0dffa94110a653b5696083dd7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"777995e0439d0067f7ffa38b60f9225b1cf35dc0dffa94110a653b5696083dd7","first_computed_at":"2026-07-05T11:29:39.356814Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:29:39.356814Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Zp05lHErkgN7AsWXYGOrZZQKMuhp6aStf6gTBSZmR9R5qRIfN13bnTk9QJeUBYr5guRT68s+rmZuoEByt9mFBA==","signature_status":"signed_v1","signed_at":"2026-07-05T11:29:39.357375Z","signed_message":"canonical_sha256_bytes"},"source_id":"2507.00215","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:98273324da02de87cb06868a4d8e14f48b614da0714e2061b1dfde896ee8e22f","sha256:5fb8b0687e3d5a70b560d2fda4a061e1441c27636bd4884926b3284547c6ef93"],"state_sha256":"2932eebec9f0829229a914d76df47882a075b84dcec814cac03c67b955516b54"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lFQwgh6huH5nFnZIhg3H3+izDLJnBn1TNTYI6/UgCDOYIEkHYCJqNsfD4HuznvRN0PW6P95GPiVY548o0mKeDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T15:01:40.666701Z","bundle_sha256":"98e716e651f5edec26dd61dbbc8efb3c14663793bb3f5f17a466f9a1f9a6eff4"}}