{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:74UYYYAPQGMQYH47ZAPEX7LQLT","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":"4389b7835b27d93c46063a8ed4ac105e121ab8f59c603d2ab710f71904fc0a6b","cross_cats_sorted":["quant-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.atom-ph","submitted_at":"2025-08-17T17:09:30Z","title_canon_sha256":"6c47f5152952227d6c166f3e9f34e59329f883eee458aa3e75e29d97928c4377"},"schema_version":"1.0","source":{"id":"2508.12437","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2508.12437","created_at":"2026-07-05T11:55:42Z"},{"alias_kind":"arxiv_version","alias_value":"2508.12437v2","created_at":"2026-07-05T11:55:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2508.12437","created_at":"2026-07-05T11:55:42Z"},{"alias_kind":"pith_short_12","alias_value":"74UYYYAPQGMQ","created_at":"2026-07-05T11:55:42Z"},{"alias_kind":"pith_short_16","alias_value":"74UYYYAPQGMQYH47","created_at":"2026-07-05T11:55:42Z"},{"alias_kind":"pith_short_8","alias_value":"74UYYYAP","created_at":"2026-07-05T11:55:42Z"}],"graph_snapshots":[{"event_id":"sha256:96f70385fc141e7202899d17749aa4d6d3553e7d80fbe58986aec15d2f2c107b","target":"graph","created_at":"2026-07-05T11:55:42Z","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/2508.12437/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Reducing the size and complexity of high-performance timekeeping devices is an ever-growing need for various applications, such as 6G wireless technology, positioning, navigation and timing (PNT), Internet of Things (IoT), and ultrafast spectroscopy. This work presents a distributed feedback (DFB) laser-pumped Rb atomic clock, which features extraordinary frequency stability, small size and low power consumption. The DFB laser head employs a built-in isolator with a linewidth of approximately 1 MHz. For complete optical pumping of the atoms in the absorption cell, the laser beam is expanded to","authors_text":"Jun Ruan, Peter Yun, Qiang Hao, Shaojie Yang, Shougang Zhang","cross_cats":["quant-ph"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.atom-ph","submitted_at":"2025-08-17T17:09:30Z","title":"Portable Laser-Pumped Rb Atomic Clock with Digital Circuits"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2508.12437","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":"sha256:478e31b6329356d23f8131bf1fcf7777c8544b22d95f14201aac921eb54e6519","target":"record","created_at":"2026-07-05T11:55:42Z","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":"4389b7835b27d93c46063a8ed4ac105e121ab8f59c603d2ab710f71904fc0a6b","cross_cats_sorted":["quant-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.atom-ph","submitted_at":"2025-08-17T17:09:30Z","title_canon_sha256":"6c47f5152952227d6c166f3e9f34e59329f883eee458aa3e75e29d97928c4377"},"schema_version":"1.0","source":{"id":"2508.12437","kind":"arxiv","version":2}},"canonical_sha256":"ff298c600f81990c1f9fc81e4bfd705ccd1360a6ef8ea6d71f2fb3ebd30114e3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ff298c600f81990c1f9fc81e4bfd705ccd1360a6ef8ea6d71f2fb3ebd30114e3","first_computed_at":"2026-07-05T11:55:42.655005Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:55:42.655005Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"XXyTGl898Ia6dSL2br1uNvY3KquPzVz9eVoKLtcrg9NEkT9oIvrmCAR2piBb/6JGxptHmbxlQA1ezM/4O7PzDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T11:55:42.655528Z","signed_message":"canonical_sha256_bytes"},"source_id":"2508.12437","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:478e31b6329356d23f8131bf1fcf7777c8544b22d95f14201aac921eb54e6519","sha256:96f70385fc141e7202899d17749aa4d6d3553e7d80fbe58986aec15d2f2c107b"],"state_sha256":"269288552b4bf71459ee88b1b9183b0a692389bfbe8d89d4929c70069f5e0db5"}