{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:GETEZMIX247BZSCC7CEA62K56V","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":"ad88ad1de7efa167af703e96b18c19f9e0460a1f11868d8a28c3a9fffea9b179","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2026-05-13T16:22:53Z","title_canon_sha256":"a203bdfb67c0fb3b4bf529e208941be0a8db7a93b71422b42c8e33c5c54aaeb0"},"schema_version":"1.0","source":{"id":"2605.13745","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2605.13745","created_at":"2026-05-18T02:44:16Z"},{"alias_kind":"arxiv_version","alias_value":"2605.13745v1","created_at":"2026-05-18T02:44:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.13745","created_at":"2026-05-18T02:44:16Z"},{"alias_kind":"pith_short_12","alias_value":"GETEZMIX247B","created_at":"2026-05-18T12:33:37Z"},{"alias_kind":"pith_short_16","alias_value":"GETEZMIX247BZSCC","created_at":"2026-05-18T12:33:37Z"},{"alias_kind":"pith_short_8","alias_value":"GETEZMIX","created_at":"2026-05-18T12:33:37Z"}],"graph_snapshots":[{"event_id":"sha256:6f2468461572085a47e1a66b54d1d66681649e794b6aa30bde70f734a326b786","target":"graph","created_at":"2026-05-18T02:44:16Z","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":4,"items":[{"attestation":"unclaimed","claim_id":"C1","kind":"strongest_claim","source":"verdict.strongest_claim","status":"machine_extracted","text":"We show that the chi2 coupled-wave dynamics in the doubling crystal admit a Lyapunov functional whose monotone decrease under each crystal pass establishes a constant-intensity manifold as the per-pass descent target of the mode dynamics."},{"attestation":"unclaimed","claim_id":"C2","kind":"weakest_assumption","source":"verdict.weakest_assumption","status":"machine_extracted","text":"That the chi2 coupled-wave equations dominate the intracavity dynamics and that no other loss channels or cavity effects prevent the Lyapunov functional from monotonically decreasing to the constant-intensity manifold."},{"attestation":"unclaimed","claim_id":"C3","kind":"one_line_summary","source":"verdict.one_line_summary","status":"machine_extracted","text":"Chi2 coupling in intracavity frequency doubling admits a Lyapunov functional that monotonically decreases to a constant-intensity manifold, yielding 100-fold noise suppression beyond partition statistics in an Nd:YVO4-LBO laser."},{"attestation":"unclaimed","claim_id":"C4","kind":"headline","source":"verdict.pith_extraction.headline","status":"machine_extracted","text":"Chi-squared coupled-wave dynamics in frequency-doubled lasers admit a Lyapunov functional that suppresses amplitude noise by driving modes to constant intensity."}],"snapshot_sha256":"61b01b3694e4d5d004453d788e47d6481a14ad6721ad4df4105dc0544f368437"},"formal_canon":{"evidence_count":2,"snapshot_sha256":"6147211ac8c818c7c81c75f869d6f6d9c810e451bd421486a36580b517217ffa"},"paper":{"abstract_excerpt":"Multimode intracavity frequency-doubled lasers can reach states of amplitude noise suppression orders of magnitude beyond the predictions of independent-mode partition statistics. We show that the chi2 coupled-wave dynamics in the doubling crystal admit a Lyapunov functional whose monotone decrease under each crystal pass establishes a constant-intensity manifold as the per-pass descent target of the mode dynamics. We confirm the mechanism in an intracavity frequency-doubled Nd:YVO4-LBO laser, observing a 100 fold contrast between full and Fabry-Perot-filtered output noise at fixed detector ba","authors_text":"Thomas M. Baer","cross_cats":[],"headline":"Chi-squared coupled-wave dynamics in frequency-doubled lasers admit a Lyapunov functional that suppresses amplitude noise by driving modes to constant intensity.","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2026-05-13T16:22:53Z","title":"Amplitude Noise Suppression in Frequency-Doubled Lasers: A Lyapunov Mechanism for Intensity Stabilization in Coupled Oscillator Systems"},"references":{"count":31,"internal_anchors":0,"resolved_work":31,"sample":[{"cited_arxiv_id":"","doi":"","is_internal_anchor":false,"ref_index":1,"title":"T. Baer, Large-amplitude fluctuations due to longitudi- nal mode coupling in diode-pumped intracavity-doubled Nd:YAG lasers, J. Opt. Soc. Am. B3, 1175 (1986)","work_id":"20a265ae-520f-496e-9125-dac015a38df8","year":1986},{"cited_arxiv_id":"","doi":"","is_internal_anchor":false,"ref_index":2,"title":"S. E. Harris and R. Targ, FM oscillation of the He-Ne laser, Appl. Phys. Lett.5, 202 (1964)","work_id":"16c359dc-3cd7-4db8-93eb-ef4334f95ba7","year":1964},{"cited_arxiv_id":"","doi":"","is_internal_anchor":false,"ref_index":3,"title":"C. R. Wu and L. Mandel, Deterministic chaos in a laser with a saturable absorber, J. Opt. Soc. Am. B4, 1870 (1987)","work_id":"939d7f33-6a1c-4c23-bbc7-f95702a4c68d","year":1987},{"cited_arxiv_id":"","doi":"","is_internal_anchor":false,"ref_index":4,"title":"K. Wiesenfeld, C. Bracikowski, G. James, and R. Roy, Observation of antiphase states in a multimode laser, Phys. Rev. Lett.65, 1749 (1990)","work_id":"0dd5b0b6-1f47-40c8-88a1-3aa0c3154917","year":1990},{"cited_arxiv_id":"","doi":"","is_internal_anchor":false,"ref_index":5,"title":"Chaos in a multimode solid-state laser system,","work_id":"1b164447-030b-411e-8031-0bfc864c35fe","year":1993}],"snapshot_sha256":"62edd329a239c63fec63dad1f55a67e70ab982fb3dc3bd53be454f0ae65f55cf"},"source":{"id":"2605.13745","kind":"arxiv","version":1},"verdict":{"created_at":"2026-05-14T17:35:27.974561Z","id":"23166ac4-66da-4652-8e3b-1e3cfd3f6c6c","model_set":{"reader":"grok-4.3"},"one_line_summary":"Chi2 coupling in intracavity frequency doubling admits a Lyapunov functional that monotonically decreases to a constant-intensity manifold, yielding 100-fold noise suppression beyond partition statistics in an Nd:YVO4-LBO laser.","pipeline_version":"pith-pipeline@v0.9.0","pith_extraction_headline":"Chi-squared coupled-wave dynamics in frequency-doubled lasers admit a Lyapunov functional that suppresses amplitude noise by driving modes to constant intensity.","strongest_claim":"We show that the chi2 coupled-wave dynamics in the doubling crystal admit a Lyapunov functional whose monotone decrease under each crystal pass establishes a constant-intensity manifold as the per-pass descent target of the mode dynamics.","weakest_assumption":"That the chi2 coupled-wave equations dominate the intracavity dynamics and that no other loss channels or cavity effects prevent the Lyapunov functional from monotonically decreasing to the constant-intensity manifold."}},"verdict_id":"23166ac4-66da-4652-8e3b-1e3cfd3f6c6c"}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:782c484b095da7f7fa1a5bf56761cf3fd4e2d6a824581144d4d1e691a639a35d","target":"record","created_at":"2026-05-18T02:44:16Z","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":"ad88ad1de7efa167af703e96b18c19f9e0460a1f11868d8a28c3a9fffea9b179","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2026-05-13T16:22:53Z","title_canon_sha256":"a203bdfb67c0fb3b4bf529e208941be0a8db7a93b71422b42c8e33c5c54aaeb0"},"schema_version":"1.0","source":{"id":"2605.13745","kind":"arxiv","version":1}},"canonical_sha256":"31264cb117d73e1cc842f8880f695df56a87def747dacb8127055d41e063f871","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"31264cb117d73e1cc842f8880f695df56a87def747dacb8127055d41e063f871","first_computed_at":"2026-05-18T02:44:16.420125Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:44:16.420125Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"R2aJK3ZYt4Y370++E0oUvtCFd7SO0b4RAP+YC6xn6KMDcX5iLYqEJIQSSEY2ekMfa0miFh/ykmHgwhh+2l5MDg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:44:16.420593Z","signed_message":"canonical_sha256_bytes"},"source_id":"2605.13745","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:782c484b095da7f7fa1a5bf56761cf3fd4e2d6a824581144d4d1e691a639a35d","sha256:6f2468461572085a47e1a66b54d1d66681649e794b6aa30bde70f734a326b786"],"state_sha256":"eec2b7f198d38c4083fbeb4484699f49a75f391491715c072d01c6b0575525ea"}