{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:3DUMFLLSYELE6HVOQFM6UDJ4LC","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":"e1e023a7fdd9702ebb98b5665c1da148e0c5bc557c6b7d2b1fda2a50cda99ef8","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2021-09-06T19:22:20Z","title_canon_sha256":"0d8dc34db66238a663d0dd60a62c39ba3a1082225687519175bda58735fbfe7b"},"schema_version":"1.0","source":{"id":"2109.02702","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2109.02702","created_at":"2026-07-05T03:34:34Z"},{"alias_kind":"arxiv_version","alias_value":"2109.02702v1","created_at":"2026-07-05T03:34:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2109.02702","created_at":"2026-07-05T03:34:34Z"},{"alias_kind":"pith_short_12","alias_value":"3DUMFLLSYELE","created_at":"2026-07-05T03:34:34Z"},{"alias_kind":"pith_short_16","alias_value":"3DUMFLLSYELE6HVO","created_at":"2026-07-05T03:34:34Z"},{"alias_kind":"pith_short_8","alias_value":"3DUMFLLS","created_at":"2026-07-05T03:34:34Z"}],"graph_snapshots":[{"event_id":"sha256:2fef6295c7f85620167fe6a507229c513a2b17f951d67648423721b6239461fd","target":"graph","created_at":"2026-07-05T03:34:34Z","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/2109.02702/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Laser cooling of rare-earth doped solids has been demonstrated across a wide range of material platforms, inspiring the development of simple phenomenological models such as the four-level model to elucidate the universal properties of laser cooling under various operating conditions. However, these models usually require the input of full absorption spectra that must be provided experimentally or by additional complicated atomic modeling. In this letter, we propose that a four-level model, when extended to admit effective energy levels adaptive to the pumping photon energy, can accurately pre","authors_text":"Cheng Guo, Meir Orenstein, Shanhui Fan, Weiliang Jin","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2021-09-06T19:22:20Z","title":"Adaptive four-level modeling of laser cooling of solids"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2109.02702","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":"sha256:1186e46b0d6c05e1681ab01d80b082e99c43d9e6f938d7d177f06b1f6ce3574c","target":"record","created_at":"2026-07-05T03:34:34Z","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":"e1e023a7fdd9702ebb98b5665c1da148e0c5bc557c6b7d2b1fda2a50cda99ef8","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2021-09-06T19:22:20Z","title_canon_sha256":"0d8dc34db66238a663d0dd60a62c39ba3a1082225687519175bda58735fbfe7b"},"schema_version":"1.0","source":{"id":"2109.02702","kind":"arxiv","version":1}},"canonical_sha256":"d8e8c2ad72c1164f1eae8159ea0d3c58b2615c14957343860a49fdfa4edb01d2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d8e8c2ad72c1164f1eae8159ea0d3c58b2615c14957343860a49fdfa4edb01d2","first_computed_at":"2026-07-05T03:34:34.442371Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:34:34.442371Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"iRNMi9kx6fGZ87NBlUsRknGrHHHH0Oe49/lXydt9onAIa7eYSJTg0hkQwSjobK8Xlq8dlVfncEbJaI6eDp5zBg==","signature_status":"signed_v1","signed_at":"2026-07-05T03:34:34.442759Z","signed_message":"canonical_sha256_bytes"},"source_id":"2109.02702","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1186e46b0d6c05e1681ab01d80b082e99c43d9e6f938d7d177f06b1f6ce3574c","sha256:2fef6295c7f85620167fe6a507229c513a2b17f951d67648423721b6239461fd"],"state_sha256":"5844c672a151990561a3c8b25405d61592d620a645a9ce917d54ec5652537f79"}