{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:TF36P56ATTJ6XTBCH6UQV2SYXZ","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":"800205a6eb9b323a0c853c9f7e49aa31e1ea34aab0c548d598616117d62f36ba","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2016-02-26T19:52:08Z","title_canon_sha256":"30584ce73d5582fb493e4e90c14fc5c9723e0fdb07c90106c4019badeeb97e6e"},"schema_version":"1.0","source":{"id":"1602.08453","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1602.08453","created_at":"2026-05-18T01:19:56Z"},{"alias_kind":"arxiv_version","alias_value":"1602.08453v1","created_at":"2026-05-18T01:19:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1602.08453","created_at":"2026-05-18T01:19:56Z"},{"alias_kind":"pith_short_12","alias_value":"TF36P56ATTJ6","created_at":"2026-05-18T12:30:44Z"},{"alias_kind":"pith_short_16","alias_value":"TF36P56ATTJ6XTBC","created_at":"2026-05-18T12:30:44Z"},{"alias_kind":"pith_short_8","alias_value":"TF36P56A","created_at":"2026-05-18T12:30:44Z"}],"graph_snapshots":[{"event_id":"sha256:f429977e493f32725bd02cdedef0fa92af4cd83123839ae20798a3ec2e658759","target":"graph","created_at":"2026-05-18T01:19:56Z","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"},"paper":{"abstract_excerpt":"We demonstrate the use of a compound optical cavity as linear displacement detector, by measuring the thermal motion of a silicon nitride suspended membrane acting as the external mirror of a near-infrared Littrow laser diode. Fluctuations in the laser optical power induced by the membrane vibrations are collected by a photodiode integrated within the laser, and then measured with a spectrum analyzer. The dynamics of the membrane driven by a piezoelectric actuator is investigated as a function of air pressure and actuator displacement in a homodyne configuration. The high Q-factor ($\\sim 3.4\\c","authors_text":"Alessandro Pitanti, Alessandro Tredicucci, Andrea Arcangeli, Daniel Navarro-Urrios, Francesco Colangelo, Lorenzo Baldacci, Luca Masini","cross_cats":["physics.optics"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2016-02-26T19:52:08Z","title":"Thermal noise and optomechanical features in the emission of a membrane-coupled compound cavity laser diode"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1602.08453","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:a70707fe305907c66c4278495f7887f41ae811eb710b8d85ea138556fa77d300","target":"record","created_at":"2026-05-18T01:19:56Z","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":"800205a6eb9b323a0c853c9f7e49aa31e1ea34aab0c548d598616117d62f36ba","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2016-02-26T19:52:08Z","title_canon_sha256":"30584ce73d5582fb493e4e90c14fc5c9723e0fdb07c90106c4019badeeb97e6e"},"schema_version":"1.0","source":{"id":"1602.08453","kind":"arxiv","version":1}},"canonical_sha256":"9977e7f7c09cd3ebcc223fa90aea58be58b46e7096914f4675867ff715b80a26","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9977e7f7c09cd3ebcc223fa90aea58be58b46e7096914f4675867ff715b80a26","first_computed_at":"2026-05-18T01:19:56.055961Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:19:56.055961Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Z6f65hfMtrbI0iiER8YU3W8zOVMI+lBYGkjTQczf8P6jzCwiSOcovadE6OKzjOhocQSxF1/IeKj0xhnnrdLgBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:19:56.056610Z","signed_message":"canonical_sha256_bytes"},"source_id":"1602.08453","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a70707fe305907c66c4278495f7887f41ae811eb710b8d85ea138556fa77d300","sha256:f429977e493f32725bd02cdedef0fa92af4cd83123839ae20798a3ec2e658759"],"state_sha256":"1a22c61144ec3a0db72dceda746c8b0157ef5c7a8b4dc148c8398ed83813fa75"}