{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:IYZQE4ZOL5SDDV7OZFMKOF62T4","short_pith_number":"pith:IYZQE4ZO","canonical_record":{"source":{"id":"1803.10737","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2018-03-28T17:22:51Z","cross_cats_sorted":["quant-ph"],"title_canon_sha256":"9c0c2141ad4097a59885948474bea80881cbbc58433ad4afcfc433ab50543efb","abstract_canon_sha256":"76f3236a8c45dd9ba040ee5dbe833b9b2a3c52304e6d2d6ff7dfccf4baa27a0a"},"schema_version":"1.0"},"canonical_sha256":"463302732e5f6431d7eec958a717da9f0cd6e2addef9043d9b4ddca06fbfcfe0","source":{"kind":"arxiv","id":"1803.10737","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.10737","created_at":"2026-05-18T00:16:55Z"},{"alias_kind":"arxiv_version","alias_value":"1803.10737v1","created_at":"2026-05-18T00:16:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.10737","created_at":"2026-05-18T00:16:55Z"},{"alias_kind":"pith_short_12","alias_value":"IYZQE4ZOL5SD","created_at":"2026-05-18T12:32:31Z"},{"alias_kind":"pith_short_16","alias_value":"IYZQE4ZOL5SDDV7O","created_at":"2026-05-18T12:32:31Z"},{"alias_kind":"pith_short_8","alias_value":"IYZQE4ZO","created_at":"2026-05-18T12:32:31Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:IYZQE4ZOL5SDDV7OZFMKOF62T4","target":"record","payload":{"canonical_record":{"source":{"id":"1803.10737","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2018-03-28T17:22:51Z","cross_cats_sorted":["quant-ph"],"title_canon_sha256":"9c0c2141ad4097a59885948474bea80881cbbc58433ad4afcfc433ab50543efb","abstract_canon_sha256":"76f3236a8c45dd9ba040ee5dbe833b9b2a3c52304e6d2d6ff7dfccf4baa27a0a"},"schema_version":"1.0"},"canonical_sha256":"463302732e5f6431d7eec958a717da9f0cd6e2addef9043d9b4ddca06fbfcfe0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:16:55.473994Z","signature_b64":"o9cVOnVTSlmdtMdRaWQCtYlweq5M4RlTRzeuzmFmizDsNr4Yy8geTDx9sCQ+3Gq3dG+r6PZpnVxtj1fNxETVCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"463302732e5f6431d7eec958a717da9f0cd6e2addef9043d9b4ddca06fbfcfe0","last_reissued_at":"2026-05-18T00:16:55.473408Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:16:55.473408Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1803.10737","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":"2026-05-18T00:16:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HQF/S3EaoDUUIXmae9ZBnxgobtlG1zF3VRppHXZ6AUbSMOPfoYCnWNLvAQF99Bbxag8dBjHH15F/WLSBFa5yBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T12:14:11.766209Z"},"content_sha256":"10650c6115bb3f59547bce3bec9b186f2c18abd47b1de7d9d2d8de331fe86119","schema_version":"1.0","event_id":"sha256:10650c6115bb3f59547bce3bec9b186f2c18abd47b1de7d9d2d8de331fe86119"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:IYZQE4ZOL5SDDV7OZFMKOF62T4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Faraday-shielded, DC Stark-free optical lattice clock","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["quant-ph"],"primary_cat":"physics.atom-ph","authors_text":"A. D. Ludlow, D. Nicolodi, K. Beloy, N. Hinkley, R. C. Brown, R. J. Fasano, S. A. Sch\\\"affer, T. H. Yoon, W. F. McGrew, X. Zhang","submitted_at":"2018-03-28T17:22:51Z","abstract_excerpt":"We demonstrate the absence of a DC Stark shift in an ytterbium optical lattice clock. Stray electric fields are suppressed through the introduction of an in-vacuum Faraday shield. Still, the effectiveness of the shielding must be experimentally assessed. Such diagnostics are accomplished by applying high voltage to six electrodes, which are grounded in normal operation to form part of the Faraday shield. Our measurements place a constraint on the DC Stark shift at the $10^{-20}$ level, in units of the clock frequency. Moreover, we discuss a potential source of error in strategies to precisely "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.10737","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":"2026-05-18T00:16:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PfPsUhTG+QQbY3BPTs3mjagBMhvfaTFWFQwWhQFLsOP7yIPbw1mW86P+7K0ccIoe4ZBS8T4LyH3Ks+96UK9qAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T12:14:11.766581Z"},"content_sha256":"566d02a72c467d630493eedb60521619c7d52037929facd0c4e83a8cdb0efac6","schema_version":"1.0","event_id":"sha256:566d02a72c467d630493eedb60521619c7d52037929facd0c4e83a8cdb0efac6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IYZQE4ZOL5SDDV7OZFMKOF62T4/bundle.json","state_url":"https://pith.science/pith/IYZQE4ZOL5SDDV7OZFMKOF62T4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IYZQE4ZOL5SDDV7OZFMKOF62T4/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":"2026-05-28T12:14:11Z","links":{"resolver":"https://pith.science/pith/IYZQE4ZOL5SDDV7OZFMKOF62T4","bundle":"https://pith.science/pith/IYZQE4ZOL5SDDV7OZFMKOF62T4/bundle.json","state":"https://pith.science/pith/IYZQE4ZOL5SDDV7OZFMKOF62T4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IYZQE4ZOL5SDDV7OZFMKOF62T4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:IYZQE4ZOL5SDDV7OZFMKOF62T4","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":"76f3236a8c45dd9ba040ee5dbe833b9b2a3c52304e6d2d6ff7dfccf4baa27a0a","cross_cats_sorted":["quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2018-03-28T17:22:51Z","title_canon_sha256":"9c0c2141ad4097a59885948474bea80881cbbc58433ad4afcfc433ab50543efb"},"schema_version":"1.0","source":{"id":"1803.10737","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.10737","created_at":"2026-05-18T00:16:55Z"},{"alias_kind":"arxiv_version","alias_value":"1803.10737v1","created_at":"2026-05-18T00:16:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.10737","created_at":"2026-05-18T00:16:55Z"},{"alias_kind":"pith_short_12","alias_value":"IYZQE4ZOL5SD","created_at":"2026-05-18T12:32:31Z"},{"alias_kind":"pith_short_16","alias_value":"IYZQE4ZOL5SDDV7O","created_at":"2026-05-18T12:32:31Z"},{"alias_kind":"pith_short_8","alias_value":"IYZQE4ZO","created_at":"2026-05-18T12:32:31Z"}],"graph_snapshots":[{"event_id":"sha256:566d02a72c467d630493eedb60521619c7d52037929facd0c4e83a8cdb0efac6","target":"graph","created_at":"2026-05-18T00:16:55Z","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 the absence of a DC Stark shift in an ytterbium optical lattice clock. Stray electric fields are suppressed through the introduction of an in-vacuum Faraday shield. Still, the effectiveness of the shielding must be experimentally assessed. Such diagnostics are accomplished by applying high voltage to six electrodes, which are grounded in normal operation to form part of the Faraday shield. Our measurements place a constraint on the DC Stark shift at the $10^{-20}$ level, in units of the clock frequency. Moreover, we discuss a potential source of error in strategies to precisely ","authors_text":"A. D. Ludlow, D. Nicolodi, K. Beloy, N. Hinkley, R. C. Brown, R. J. Fasano, S. A. Sch\\\"affer, T. H. Yoon, W. F. McGrew, X. Zhang","cross_cats":["quant-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2018-03-28T17:22:51Z","title":"Faraday-shielded, DC Stark-free optical lattice clock"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.10737","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":"sha256:10650c6115bb3f59547bce3bec9b186f2c18abd47b1de7d9d2d8de331fe86119","target":"record","created_at":"2026-05-18T00:16:55Z","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":"76f3236a8c45dd9ba040ee5dbe833b9b2a3c52304e6d2d6ff7dfccf4baa27a0a","cross_cats_sorted":["quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2018-03-28T17:22:51Z","title_canon_sha256":"9c0c2141ad4097a59885948474bea80881cbbc58433ad4afcfc433ab50543efb"},"schema_version":"1.0","source":{"id":"1803.10737","kind":"arxiv","version":1}},"canonical_sha256":"463302732e5f6431d7eec958a717da9f0cd6e2addef9043d9b4ddca06fbfcfe0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"463302732e5f6431d7eec958a717da9f0cd6e2addef9043d9b4ddca06fbfcfe0","first_computed_at":"2026-05-18T00:16:55.473408Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:16:55.473408Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"o9cVOnVTSlmdtMdRaWQCtYlweq5M4RlTRzeuzmFmizDsNr4Yy8geTDx9sCQ+3Gq3dG+r6PZpnVxtj1fNxETVCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:16:55.473994Z","signed_message":"canonical_sha256_bytes"},"source_id":"1803.10737","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:10650c6115bb3f59547bce3bec9b186f2c18abd47b1de7d9d2d8de331fe86119","sha256:566d02a72c467d630493eedb60521619c7d52037929facd0c4e83a8cdb0efac6"],"state_sha256":"e534a53b32dac395321c9d4ccf00878b139752628e05da02bac4856460f05c51"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7y9PLdwZSDq9PKTJZv+JHqTIgYRNdKDfHV30T0xvORH9JuX1VVhGX27Mq/dUzJmi7gGPdhMA6+n2qv+B3TKPBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T12:14:11.768996Z","bundle_sha256":"0805cfda652deaaf7361a2e24f5f63dfcbe8a65796aa500491e4bc3bcffcaa71"}}