{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2013:DVGXBRCQEP2QZ7UAZFL2KGBZRY","short_pith_number":"pith:DVGXBRCQ","schema_version":"1.0","canonical_sha256":"1d4d70c45023f50cfe80c957a518398e0d828c88310e080e031889de1b33d18b","source":{"kind":"arxiv","id":"1312.3225","version":1},"attestation_state":"computed","paper":{"title":"New limit on Lorentz and CPT violating neutron spin interactions using a free precession 3He-129Xe co-magnetometer","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.atom-ph"],"primary_cat":"gr-qc","authors_text":"A. Scharth (2), A. Schnabel (3), F. Allmendinger (1), Germany), Germany (2) Institut f\\\"ur Physik, Germany (3) Physikalisch-Technische Bundesanstalt Berlin, Heidelberg, Johannes Gutenberg-Universit\\\"at, K. Tullney (2) ((1) Physikalisches Institut, Mainz, Ruprecht-Karls-Universit\\\"at, S. Karpuk (2), U. Schmidt (1), W. Heil (2), W. Kilian (3), Yu. Sobolev (2)","submitted_at":"2013-12-11T16:17:32Z","abstract_excerpt":"We report on the search for a CPT and Lorentz invariance violating coupling of the 3He and 129Xe nuclear spins (each largely determined by a valence neutron) to background tensor fields which permeate the universe. Our experimental approach is to measure the free precession of nuclear spin polarized 3He and 129Xe atoms in a homogeneous magnetic guiding field of about 400 nT using LTC SQUIDs as low-noise magnetic flux detectors. As the laboratory reference frame rotates with respect to distant stars, we look for a sidereal modulation of the Larmor frequencies of the co-located spin samples. As "},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1312.3225","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2013-12-11T16:17:32Z","cross_cats_sorted":["physics.atom-ph"],"title_canon_sha256":"189b4507fb13fa6875ff6ad269084605a8d26a6a68be9d692a0550e27b05c9e7","abstract_canon_sha256":"306dc636696911348e7016f90604d850dcab9624d9e2e431f5a3c2ae5cc3531e"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:55:38.228888Z","signature_b64":"abl2cB20d42IQjygYMinXFYsnHOHfak8U+L/OFZENx+cq9rKu87tCvBHm1iMa7jKsCpgQIJFuNTR7tU86y4mBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1d4d70c45023f50cfe80c957a518398e0d828c88310e080e031889de1b33d18b","last_reissued_at":"2026-05-18T02:55:38.228310Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:55:38.228310Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"New limit on Lorentz and CPT violating neutron spin interactions using a free precession 3He-129Xe co-magnetometer","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.atom-ph"],"primary_cat":"gr-qc","authors_text":"A. Scharth (2), A. Schnabel (3), F. Allmendinger (1), Germany), Germany (2) Institut f\\\"ur Physik, Germany (3) Physikalisch-Technische Bundesanstalt Berlin, Heidelberg, Johannes Gutenberg-Universit\\\"at, K. Tullney (2) ((1) Physikalisches Institut, Mainz, Ruprecht-Karls-Universit\\\"at, S. Karpuk (2), U. Schmidt (1), W. Heil (2), W. Kilian (3), Yu. Sobolev (2)","submitted_at":"2013-12-11T16:17:32Z","abstract_excerpt":"We report on the search for a CPT and Lorentz invariance violating coupling of the 3He and 129Xe nuclear spins (each largely determined by a valence neutron) to background tensor fields which permeate the universe. Our experimental approach is to measure the free precession of nuclear spin polarized 3He and 129Xe atoms in a homogeneous magnetic guiding field of about 400 nT using LTC SQUIDs as low-noise magnetic flux detectors. As the laboratory reference frame rotates with respect to distant stars, we look for a sidereal modulation of the Larmor frequencies of the co-located spin samples. As "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1312.3225","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1312.3225","created_at":"2026-05-18T02:55:38.228411+00:00"},{"alias_kind":"arxiv_version","alias_value":"1312.3225v1","created_at":"2026-05-18T02:55:38.228411+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1312.3225","created_at":"2026-05-18T02:55:38.228411+00:00"},{"alias_kind":"pith_short_12","alias_value":"DVGXBRCQEP2Q","created_at":"2026-05-18T12:27:43.054852+00:00"},{"alias_kind":"pith_short_16","alias_value":"DVGXBRCQEP2QZ7UA","created_at":"2026-05-18T12:27:43.054852+00:00"},{"alias_kind":"pith_short_8","alias_value":"DVGXBRCQ","created_at":"2026-05-18T12:27:43.054852+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/DVGXBRCQEP2QZ7UAZFL2KGBZRY","json":"https://pith.science/pith/DVGXBRCQEP2QZ7UAZFL2KGBZRY.json","graph_json":"https://pith.science/api/pith-number/DVGXBRCQEP2QZ7UAZFL2KGBZRY/graph.json","events_json":"https://pith.science/api/pith-number/DVGXBRCQEP2QZ7UAZFL2KGBZRY/events.json","paper":"https://pith.science/paper/DVGXBRCQ"},"agent_actions":{"view_html":"https://pith.science/pith/DVGXBRCQEP2QZ7UAZFL2KGBZRY","download_json":"https://pith.science/pith/DVGXBRCQEP2QZ7UAZFL2KGBZRY.json","view_paper":"https://pith.science/paper/DVGXBRCQ","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1312.3225&json=true","fetch_graph":"https://pith.science/api/pith-number/DVGXBRCQEP2QZ7UAZFL2KGBZRY/graph.json","fetch_events":"https://pith.science/api/pith-number/DVGXBRCQEP2QZ7UAZFL2KGBZRY/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/DVGXBRCQEP2QZ7UAZFL2KGBZRY/action/timestamp_anchor","attest_storage":"https://pith.science/pith/DVGXBRCQEP2QZ7UAZFL2KGBZRY/action/storage_attestation","attest_author":"https://pith.science/pith/DVGXBRCQEP2QZ7UAZFL2KGBZRY/action/author_attestation","sign_citation":"https://pith.science/pith/DVGXBRCQEP2QZ7UAZFL2KGBZRY/action/citation_signature","submit_replication":"https://pith.science/pith/DVGXBRCQEP2QZ7UAZFL2KGBZRY/action/replication_record"}},"created_at":"2026-05-18T02:55:38.228411+00:00","updated_at":"2026-05-18T02:55:38.228411+00:00"}