{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2017:DDY2AHTEXTGURSMXDEHU4KEXF7","short_pith_number":"pith:DDY2AHTE","schema_version":"1.0","canonical_sha256":"18f1a01e64bccd48c997190f4e28972ffc6b9b0235e996237d4b337cc4d777da","source":{"kind":"arxiv","id":"1701.05696","version":1},"attestation_state":"computed","paper":{"title":"Two-step pulse observation to improve resonance contrast for coherent population trapping atomic clock","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.atom-ph","authors_text":"Masatoshi Kajita, Shigeyoshi Goka, Yuichiro Yano","submitted_at":"2017-01-20T05:22:40Z","abstract_excerpt":"We study resonance contrast by a two-step pulse observation method to enhance the frequency stability of coherent population trapping (CPT) atomic clocks. The proposed method is a two-step Raman--Ramsey scheme with low intensity during resonance observation and high intensity after the observation. This method reduces the frequency variation in the light intensity and maintains a high signal-to-noise ratio. The resonance characteristics were calculated by density matrix analysis of a $\\Lambda$-type three-level system that was modeled on the $^{133}$Cs D1 line, and the characteristics were also"},"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":"1701.05696","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2017-01-20T05:22:40Z","cross_cats_sorted":[],"title_canon_sha256":"575c4a625874c9cb3b3ec64f7545e924c46589aad69fdb024ec256cc00dc79cf","abstract_canon_sha256":"c0c51cebbfad310658181d5259a0b551cc96e3bcfa27cc9715f12f066de35439"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:49:09.702227Z","signature_b64":"2vKlVDHiB6oinbgBZAq1DbdF1D7ewXtvQTRiAJpVHfy+aKhUUa1RLqEcYZPtY5xqINtEEQPShQ1UeDRcN8xlCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"18f1a01e64bccd48c997190f4e28972ffc6b9b0235e996237d4b337cc4d777da","last_reissued_at":"2026-05-18T00:49:09.701642Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:49:09.701642Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Two-step pulse observation to improve resonance contrast for coherent population trapping atomic clock","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.atom-ph","authors_text":"Masatoshi Kajita, Shigeyoshi Goka, Yuichiro Yano","submitted_at":"2017-01-20T05:22:40Z","abstract_excerpt":"We study resonance contrast by a two-step pulse observation method to enhance the frequency stability of coherent population trapping (CPT) atomic clocks. The proposed method is a two-step Raman--Ramsey scheme with low intensity during resonance observation and high intensity after the observation. This method reduces the frequency variation in the light intensity and maintains a high signal-to-noise ratio. The resonance characteristics were calculated by density matrix analysis of a $\\Lambda$-type three-level system that was modeled on the $^{133}$Cs D1 line, and the characteristics were also"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1701.05696","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":"1701.05696","created_at":"2026-05-18T00:49:09.701728+00:00"},{"alias_kind":"arxiv_version","alias_value":"1701.05696v1","created_at":"2026-05-18T00:49:09.701728+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1701.05696","created_at":"2026-05-18T00:49:09.701728+00:00"},{"alias_kind":"pith_short_12","alias_value":"DDY2AHTEXTGU","created_at":"2026-05-18T12:31:10.602751+00:00"},{"alias_kind":"pith_short_16","alias_value":"DDY2AHTEXTGURSMX","created_at":"2026-05-18T12:31:10.602751+00:00"},{"alias_kind":"pith_short_8","alias_value":"DDY2AHTE","created_at":"2026-05-18T12:31:10.602751+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/DDY2AHTEXTGURSMXDEHU4KEXF7","json":"https://pith.science/pith/DDY2AHTEXTGURSMXDEHU4KEXF7.json","graph_json":"https://pith.science/api/pith-number/DDY2AHTEXTGURSMXDEHU4KEXF7/graph.json","events_json":"https://pith.science/api/pith-number/DDY2AHTEXTGURSMXDEHU4KEXF7/events.json","paper":"https://pith.science/paper/DDY2AHTE"},"agent_actions":{"view_html":"https://pith.science/pith/DDY2AHTEXTGURSMXDEHU4KEXF7","download_json":"https://pith.science/pith/DDY2AHTEXTGURSMXDEHU4KEXF7.json","view_paper":"https://pith.science/paper/DDY2AHTE","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1701.05696&json=true","fetch_graph":"https://pith.science/api/pith-number/DDY2AHTEXTGURSMXDEHU4KEXF7/graph.json","fetch_events":"https://pith.science/api/pith-number/DDY2AHTEXTGURSMXDEHU4KEXF7/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/DDY2AHTEXTGURSMXDEHU4KEXF7/action/timestamp_anchor","attest_storage":"https://pith.science/pith/DDY2AHTEXTGURSMXDEHU4KEXF7/action/storage_attestation","attest_author":"https://pith.science/pith/DDY2AHTEXTGURSMXDEHU4KEXF7/action/author_attestation","sign_citation":"https://pith.science/pith/DDY2AHTEXTGURSMXDEHU4KEXF7/action/citation_signature","submit_replication":"https://pith.science/pith/DDY2AHTEXTGURSMXDEHU4KEXF7/action/replication_record"}},"created_at":"2026-05-18T00:49:09.701728+00:00","updated_at":"2026-05-18T00:49:09.701728+00:00"}