{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:FZ7FLHYS6DFONJ5TGYAKGNQFMZ","short_pith_number":"pith:FZ7FLHYS","canonical_record":{"source":{"id":"1411.7893","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-11-28T15:06:09Z","cross_cats_sorted":["physics.atom-ph"],"title_canon_sha256":"a16d61bdaed11c3cad51bbf807a4f7718a4558fe8925fd553c920eb4b2867731","abstract_canon_sha256":"3e187e2aea8816c95bfa575cd8d6712a672c5f252d70782569aaa67359b1bff2"},"schema_version":"1.0"},"canonical_sha256":"2e7e559f12f0cae6a7b33600a336056644ae3532b27ae6ae27d63f4f8049acac","source":{"kind":"arxiv","id":"1411.7893","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1411.7893","created_at":"2026-05-18T01:12:08Z"},{"alias_kind":"arxiv_version","alias_value":"1411.7893v2","created_at":"2026-05-18T01:12:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1411.7893","created_at":"2026-05-18T01:12:08Z"},{"alias_kind":"pith_short_12","alias_value":"FZ7FLHYS6DFO","created_at":"2026-05-18T12:28:28Z"},{"alias_kind":"pith_short_16","alias_value":"FZ7FLHYS6DFONJ5T","created_at":"2026-05-18T12:28:28Z"},{"alias_kind":"pith_short_8","alias_value":"FZ7FLHYS","created_at":"2026-05-18T12:28:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:FZ7FLHYS6DFONJ5TGYAKGNQFMZ","target":"record","payload":{"canonical_record":{"source":{"id":"1411.7893","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-11-28T15:06:09Z","cross_cats_sorted":["physics.atom-ph"],"title_canon_sha256":"a16d61bdaed11c3cad51bbf807a4f7718a4558fe8925fd553c920eb4b2867731","abstract_canon_sha256":"3e187e2aea8816c95bfa575cd8d6712a672c5f252d70782569aaa67359b1bff2"},"schema_version":"1.0"},"canonical_sha256":"2e7e559f12f0cae6a7b33600a336056644ae3532b27ae6ae27d63f4f8049acac","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:12:08.751005Z","signature_b64":"eHBGD7my2sqiDN68ErOJhwFYvN0SbbiLomVDh7gAAFTT+muqBCtYJ/R7qgFXfFxZI9xN652tPMtMjRX6H8rJCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2e7e559f12f0cae6a7b33600a336056644ae3532b27ae6ae27d63f4f8049acac","last_reissued_at":"2026-05-18T01:12:08.750626Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:12:08.750626Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1411.7893","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":"2026-05-18T01:12:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xB+xGyXkRZk9W3PL8Z9XeAQ5BNbNgULn6Y2Rwe/tdV/Gwvx5rGYhtn2CCuGZq/KN/KTSlem2Y6j/F/KlTqFTBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T09:05:05.842934Z"},"content_sha256":"e8270e5c171c0829c9aa54dd7cd64a73d99edb8e4bd0e0510d0bc9dcb034b507","schema_version":"1.0","event_id":"sha256:e8270e5c171c0829c9aa54dd7cd64a73d99edb8e4bd0e0510d0bc9dcb034b507"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:FZ7FLHYS6DFONJ5TGYAKGNQFMZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Ultrasensitive Magnetometer Using a Single Atom","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.atom-ph"],"primary_cat":"quant-ph","authors_text":"A. Retzker, Ch. Wunderlich, I. Baumgart, J.-M. Cai, M. B. Plenio","submitted_at":"2014-11-28T15:06:09Z","abstract_excerpt":"Precision sensing, and in particular high precision magnetometry, is a central goal of research into quantum technologies. For magnetometers, often trade-offs exist between sensitivity, spatial resolution, and frequency range. The precision, and thus the sensitivity of magnetometry, scales as $1/\\sqrt {T_2}$ with the phase coherence time, $T_2$, of the sensing system playing the role of a key determinant. Adapting a dynamical decoupling scheme that allows for extending $T_2$ by orders of magnitude and merging it with a magnetic sensing protocol, we achieve a measurement sensitivity even for hi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1411.7893","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":"2026-05-18T01:12:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hW7cUjAc74D2JdIR38w/yOqkdrsFTLvzNZ8jA+K9mGZEPJDTy7riT1OLWZmcrKaoacKyT1SZ9WdXTtnzK/6qAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T09:05:05.843278Z"},"content_sha256":"1e4590264b6498ac04bf1bd030babf72707969a22d76f06ad6b4c7a5106c02c7","schema_version":"1.0","event_id":"sha256:1e4590264b6498ac04bf1bd030babf72707969a22d76f06ad6b4c7a5106c02c7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FZ7FLHYS6DFONJ5TGYAKGNQFMZ/bundle.json","state_url":"https://pith.science/pith/FZ7FLHYS6DFONJ5TGYAKGNQFMZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FZ7FLHYS6DFONJ5TGYAKGNQFMZ/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":"2026-05-30T09:05:05Z","links":{"resolver":"https://pith.science/pith/FZ7FLHYS6DFONJ5TGYAKGNQFMZ","bundle":"https://pith.science/pith/FZ7FLHYS6DFONJ5TGYAKGNQFMZ/bundle.json","state":"https://pith.science/pith/FZ7FLHYS6DFONJ5TGYAKGNQFMZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FZ7FLHYS6DFONJ5TGYAKGNQFMZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:FZ7FLHYS6DFONJ5TGYAKGNQFMZ","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":"3e187e2aea8816c95bfa575cd8d6712a672c5f252d70782569aaa67359b1bff2","cross_cats_sorted":["physics.atom-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-11-28T15:06:09Z","title_canon_sha256":"a16d61bdaed11c3cad51bbf807a4f7718a4558fe8925fd553c920eb4b2867731"},"schema_version":"1.0","source":{"id":"1411.7893","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1411.7893","created_at":"2026-05-18T01:12:08Z"},{"alias_kind":"arxiv_version","alias_value":"1411.7893v2","created_at":"2026-05-18T01:12:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1411.7893","created_at":"2026-05-18T01:12:08Z"},{"alias_kind":"pith_short_12","alias_value":"FZ7FLHYS6DFO","created_at":"2026-05-18T12:28:28Z"},{"alias_kind":"pith_short_16","alias_value":"FZ7FLHYS6DFONJ5T","created_at":"2026-05-18T12:28:28Z"},{"alias_kind":"pith_short_8","alias_value":"FZ7FLHYS","created_at":"2026-05-18T12:28:28Z"}],"graph_snapshots":[{"event_id":"sha256:1e4590264b6498ac04bf1bd030babf72707969a22d76f06ad6b4c7a5106c02c7","target":"graph","created_at":"2026-05-18T01:12:08Z","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":"Precision sensing, and in particular high precision magnetometry, is a central goal of research into quantum technologies. For magnetometers, often trade-offs exist between sensitivity, spatial resolution, and frequency range. The precision, and thus the sensitivity of magnetometry, scales as $1/\\sqrt {T_2}$ with the phase coherence time, $T_2$, of the sensing system playing the role of a key determinant. Adapting a dynamical decoupling scheme that allows for extending $T_2$ by orders of magnitude and merging it with a magnetic sensing protocol, we achieve a measurement sensitivity even for hi","authors_text":"A. Retzker, Ch. Wunderlich, I. Baumgart, J.-M. Cai, M. B. Plenio","cross_cats":["physics.atom-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-11-28T15:06:09Z","title":"Ultrasensitive Magnetometer Using a Single Atom"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1411.7893","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:e8270e5c171c0829c9aa54dd7cd64a73d99edb8e4bd0e0510d0bc9dcb034b507","target":"record","created_at":"2026-05-18T01:12:08Z","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":"3e187e2aea8816c95bfa575cd8d6712a672c5f252d70782569aaa67359b1bff2","cross_cats_sorted":["physics.atom-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-11-28T15:06:09Z","title_canon_sha256":"a16d61bdaed11c3cad51bbf807a4f7718a4558fe8925fd553c920eb4b2867731"},"schema_version":"1.0","source":{"id":"1411.7893","kind":"arxiv","version":2}},"canonical_sha256":"2e7e559f12f0cae6a7b33600a336056644ae3532b27ae6ae27d63f4f8049acac","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2e7e559f12f0cae6a7b33600a336056644ae3532b27ae6ae27d63f4f8049acac","first_computed_at":"2026-05-18T01:12:08.750626Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:12:08.750626Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"eHBGD7my2sqiDN68ErOJhwFYvN0SbbiLomVDh7gAAFTT+muqBCtYJ/R7qgFXfFxZI9xN652tPMtMjRX6H8rJCA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:12:08.751005Z","signed_message":"canonical_sha256_bytes"},"source_id":"1411.7893","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e8270e5c171c0829c9aa54dd7cd64a73d99edb8e4bd0e0510d0bc9dcb034b507","sha256:1e4590264b6498ac04bf1bd030babf72707969a22d76f06ad6b4c7a5106c02c7"],"state_sha256":"dafac428c72d6b7450af3dae2f4c1b5e72aa380978a3dcf11051c987f7dab313"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HKL431j8k8IdHQsJrVWb8hFdJx+rz858e5s1dc3qIvulVsXin0igjJVXKnw0lQlR4R1Vxr1VzHs6AGf122kRAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T09:05:05.845242Z","bundle_sha256":"e22cb66b38725c01a46c9fc31d8735de3435c2b23189a2d60d6c39a94b5256fa"}}