{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:GMESFGWYAPT437ER2W3S2BI27Q","short_pith_number":"pith:GMESFGWY","canonical_record":{"source":{"id":"1506.07088","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2015-06-23T16:53:50Z","cross_cats_sorted":[],"title_canon_sha256":"2ad545f9d63f2827535e43971beffdee156606b83c9e5802b2003b12778dac0f","abstract_canon_sha256":"96e5e63f0dbf709a30955c76639ccedeb58a5238bc7947024faf4d406cdda861"},"schema_version":"1.0"},"canonical_sha256":"3309229ad803e7cdfc91d5b72d051afc0b15a2022a01d85a886821fc56a7de28","source":{"kind":"arxiv","id":"1506.07088","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1506.07088","created_at":"2026-05-18T01:18:33Z"},{"alias_kind":"arxiv_version","alias_value":"1506.07088v2","created_at":"2026-05-18T01:18:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1506.07088","created_at":"2026-05-18T01:18:33Z"},{"alias_kind":"pith_short_12","alias_value":"GMESFGWYAPT4","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_16","alias_value":"GMESFGWYAPT437ER","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_8","alias_value":"GMESFGWY","created_at":"2026-05-18T12:29:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:GMESFGWYAPT437ER2W3S2BI27Q","target":"record","payload":{"canonical_record":{"source":{"id":"1506.07088","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2015-06-23T16:53:50Z","cross_cats_sorted":[],"title_canon_sha256":"2ad545f9d63f2827535e43971beffdee156606b83c9e5802b2003b12778dac0f","abstract_canon_sha256":"96e5e63f0dbf709a30955c76639ccedeb58a5238bc7947024faf4d406cdda861"},"schema_version":"1.0"},"canonical_sha256":"3309229ad803e7cdfc91d5b72d051afc0b15a2022a01d85a886821fc56a7de28","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:18:33.641104Z","signature_b64":"wG/oth5EiPvTzh0w29ooOFYme72cbOLoyhPRbtsHT47SAirb9TgQc4GDrqJA09CAHRrkknByYgNfXGO1pjbwCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3309229ad803e7cdfc91d5b72d051afc0b15a2022a01d85a886821fc56a7de28","last_reissued_at":"2026-05-18T01:18:33.640717Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:18:33.640717Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1506.07088","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:18:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IpKM7yFNU+XTl8kMbrU7Mf11zb77r2IyQXMOWOmoanvXDpyUnjQRPrCEsayW9r0AC52O1nK0+NT+Hgx2t3XLAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T04:02:29.852546Z"},"content_sha256":"afa7f6d1045778c07cab3b74b62e67e06219e9f578d0ae6886199b7f9d5d3ef5","schema_version":"1.0","event_id":"sha256:afa7f6d1045778c07cab3b74b62e67e06219e9f578d0ae6886199b7f9d5d3ef5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:GMESFGWYAPT437ER2W3S2BI27Q","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Coherent Cancellation of Photothermal Noise in GaAs/Al$_{0.92}$Ga$_{0.08}$As Bragg Mirrors","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"David Follman, Eric K. Gustafson, Evan D. Hall, Frank Seifert, Garrett D. Cole, Joshua R. Smith, Koji Arai, Markus Aspelmeyer, Rana X Adhikari, Tara Chalermsongsak","submitted_at":"2015-06-23T16:53:50Z","abstract_excerpt":"Thermal noise is a limiting factor in many high-precision optical experiments. A search is underway for novel optical materials with reduced thermal noise. One such pair of materials, gallium arsenide and aluminum-alloyed gallium arsenide (collectively referred to as AlGaAs), shows promise for its low Brownian noise when compared to conventional materials such as silica and tantala. However, AlGaAs has the potential to produce a high level of thermo-optic noise. We have fabricated a set of AlGaAs crystalline coatings, transferred to fused silica substrates, whose layer structure has been optim"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1506.07088","kind":"arxiv","version":2},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:18:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7FUXbhj9xCz6CIcdYaMf4xObk6abtZOqcRm1oYuCOmDENZhjAoAfSkKAWkxf2faW3Y742XInhvekmegPVRZgCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T04:02:29.853222Z"},"content_sha256":"3d34a24a97f07d458926f4dfebcce72030a89b386baca6fa3ce8738735ccbef0","schema_version":"1.0","event_id":"sha256:3d34a24a97f07d458926f4dfebcce72030a89b386baca6fa3ce8738735ccbef0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GMESFGWYAPT437ER2W3S2BI27Q/bundle.json","state_url":"https://pith.science/pith/GMESFGWYAPT437ER2W3S2BI27Q/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GMESFGWYAPT437ER2W3S2BI27Q/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-26T04:02:29Z","links":{"resolver":"https://pith.science/pith/GMESFGWYAPT437ER2W3S2BI27Q","bundle":"https://pith.science/pith/GMESFGWYAPT437ER2W3S2BI27Q/bundle.json","state":"https://pith.science/pith/GMESFGWYAPT437ER2W3S2BI27Q/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GMESFGWYAPT437ER2W3S2BI27Q/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:GMESFGWYAPT437ER2W3S2BI27Q","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":"96e5e63f0dbf709a30955c76639ccedeb58a5238bc7947024faf4d406cdda861","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2015-06-23T16:53:50Z","title_canon_sha256":"2ad545f9d63f2827535e43971beffdee156606b83c9e5802b2003b12778dac0f"},"schema_version":"1.0","source":{"id":"1506.07088","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1506.07088","created_at":"2026-05-18T01:18:33Z"},{"alias_kind":"arxiv_version","alias_value":"1506.07088v2","created_at":"2026-05-18T01:18:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1506.07088","created_at":"2026-05-18T01:18:33Z"},{"alias_kind":"pith_short_12","alias_value":"GMESFGWYAPT4","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_16","alias_value":"GMESFGWYAPT437ER","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_8","alias_value":"GMESFGWY","created_at":"2026-05-18T12:29:22Z"}],"graph_snapshots":[{"event_id":"sha256:3d34a24a97f07d458926f4dfebcce72030a89b386baca6fa3ce8738735ccbef0","target":"graph","created_at":"2026-05-18T01:18:33Z","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":"Thermal noise is a limiting factor in many high-precision optical experiments. A search is underway for novel optical materials with reduced thermal noise. One such pair of materials, gallium arsenide and aluminum-alloyed gallium arsenide (collectively referred to as AlGaAs), shows promise for its low Brownian noise when compared to conventional materials such as silica and tantala. However, AlGaAs has the potential to produce a high level of thermo-optic noise. We have fabricated a set of AlGaAs crystalline coatings, transferred to fused silica substrates, whose layer structure has been optim","authors_text":"David Follman, Eric K. Gustafson, Evan D. Hall, Frank Seifert, Garrett D. Cole, Joshua R. Smith, Koji Arai, Markus Aspelmeyer, Rana X Adhikari, Tara Chalermsongsak","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2015-06-23T16:53:50Z","title":"Coherent Cancellation of Photothermal Noise in GaAs/Al$_{0.92}$Ga$_{0.08}$As Bragg Mirrors"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1506.07088","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:afa7f6d1045778c07cab3b74b62e67e06219e9f578d0ae6886199b7f9d5d3ef5","target":"record","created_at":"2026-05-18T01:18:33Z","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":"96e5e63f0dbf709a30955c76639ccedeb58a5238bc7947024faf4d406cdda861","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2015-06-23T16:53:50Z","title_canon_sha256":"2ad545f9d63f2827535e43971beffdee156606b83c9e5802b2003b12778dac0f"},"schema_version":"1.0","source":{"id":"1506.07088","kind":"arxiv","version":2}},"canonical_sha256":"3309229ad803e7cdfc91d5b72d051afc0b15a2022a01d85a886821fc56a7de28","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3309229ad803e7cdfc91d5b72d051afc0b15a2022a01d85a886821fc56a7de28","first_computed_at":"2026-05-18T01:18:33.640717Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:18:33.640717Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"wG/oth5EiPvTzh0w29ooOFYme72cbOLoyhPRbtsHT47SAirb9TgQc4GDrqJA09CAHRrkknByYgNfXGO1pjbwCw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:18:33.641104Z","signed_message":"canonical_sha256_bytes"},"source_id":"1506.07088","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:afa7f6d1045778c07cab3b74b62e67e06219e9f578d0ae6886199b7f9d5d3ef5","sha256:3d34a24a97f07d458926f4dfebcce72030a89b386baca6fa3ce8738735ccbef0"],"state_sha256":"74d3ab20259a1a6bd476fec829b8c3d77816056c8c861068c1a46c0f5bd478b8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3zdhpy75aMJwSDbtVJ6mWU1rrRs+gLaK97UfTT1qqcJ+g3yYiTIBPclOZbQoRKrKpL4MrYJwVqHyP2RICBDQCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T04:02:29.856037Z","bundle_sha256":"c4b8e3937525be6f14776076da507b27591c986a95c0989c1cd8b4efe2b78bbc"}}