{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:P3WZLH6UGBS2RAAWQIBPFFCB63","short_pith_number":"pith:P3WZLH6U","canonical_record":{"source":{"id":"1808.04175","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-08-13T12:37:19Z","cross_cats_sorted":[],"title_canon_sha256":"f8bdcb7532b16c029eedd7df92d72b7c51b7a26cfca855fcdb2d7989c234f38f","abstract_canon_sha256":"d82052d8e2725e5ab7d29bb17d97899e825fdcfde8528aba46e5acd31b74d52c"},"schema_version":"1.0"},"canonical_sha256":"7eed959fd43065a880168202f29441f6f7f07c9d16067b73d8479d001afaf338","source":{"kind":"arxiv","id":"1808.04175","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.04175","created_at":"2026-05-17T23:59:32Z"},{"alias_kind":"arxiv_version","alias_value":"1808.04175v2","created_at":"2026-05-17T23:59:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.04175","created_at":"2026-05-17T23:59:32Z"},{"alias_kind":"pith_short_12","alias_value":"P3WZLH6UGBS2","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_16","alias_value":"P3WZLH6UGBS2RAAW","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_8","alias_value":"P3WZLH6U","created_at":"2026-05-18T12:32:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:P3WZLH6UGBS2RAAWQIBPFFCB63","target":"record","payload":{"canonical_record":{"source":{"id":"1808.04175","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-08-13T12:37:19Z","cross_cats_sorted":[],"title_canon_sha256":"f8bdcb7532b16c029eedd7df92d72b7c51b7a26cfca855fcdb2d7989c234f38f","abstract_canon_sha256":"d82052d8e2725e5ab7d29bb17d97899e825fdcfde8528aba46e5acd31b74d52c"},"schema_version":"1.0"},"canonical_sha256":"7eed959fd43065a880168202f29441f6f7f07c9d16067b73d8479d001afaf338","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:59:32.306828Z","signature_b64":"eUIDbW/l4/BLpkoe7eEDGRlDow6BLJsRE6NpDkaRbc5P3tCN1CFXbEnrCnSYnR4edxnfY427HFcE3Ve/zOm3CQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7eed959fd43065a880168202f29441f6f7f07c9d16067b73d8479d001afaf338","last_reissued_at":"2026-05-17T23:59:32.306204Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:59:32.306204Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1808.04175","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":"2026-05-17T23:59:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0ZZ+IwHJVmfU9YHqNWLO7wEPTONWHvncqTdmtHGa+ztp1mkRJjnJ+v6oOmFHPwXSU4tHwLC4c136MoSOaji3Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T03:49:16.522613Z"},"content_sha256":"2d615b8bdec1ec6a914aabfca7d1b3647e92a4e0295ce6d3fbfbdc4fa3b5ca8b","schema_version":"1.0","event_id":"sha256:2d615b8bdec1ec6a914aabfca7d1b3647e92a4e0295ce6d3fbfbdc4fa3b5ca8b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:P3WZLH6UGBS2RAAWQIBPFFCB63","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Review of Compact Interferometers","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Binlei Ding, Christophe Collette, Conor M. Mow-Lowry, Jennifer Watchi, Sam Cooper","submitted_at":"2018-08-13T12:37:19Z","abstract_excerpt":"Compact interferometers, called phasemeters, make it possible to operate over a large range while ensuring a high resolution. Such performance is required for the stabilization of large instruments dedicated to experimental physics such as gravitational wave detectors. This paper aims at presenting the working principle of the different types of phasemeters developed in the literature. These devices can be classified into two categories: homodyne and heterodyne interferometers. Improvement of resolution and accuracy has been studied for both devices. Resolution is related to the noise sources "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.04175","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":"2026-05-17T23:59:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"go13rWSYVFeoH6SdymNdLW5zTEEe93nBLM+XRScOH6fJkAyNKqjDkCghC11cUZQYWIq0wP5tSejX47LWUuHsBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T03:49:16.523526Z"},"content_sha256":"79168666ab3d07141f03a76484d8e9352c6c012d754ae987135ddb90988c210c","schema_version":"1.0","event_id":"sha256:79168666ab3d07141f03a76484d8e9352c6c012d754ae987135ddb90988c210c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/P3WZLH6UGBS2RAAWQIBPFFCB63/bundle.json","state_url":"https://pith.science/pith/P3WZLH6UGBS2RAAWQIBPFFCB63/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/P3WZLH6UGBS2RAAWQIBPFFCB63/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":"2026-08-05T03:49:16Z","links":{"resolver":"https://pith.science/pith/P3WZLH6UGBS2RAAWQIBPFFCB63","bundle":"https://pith.science/pith/P3WZLH6UGBS2RAAWQIBPFFCB63/bundle.json","state":"https://pith.science/pith/P3WZLH6UGBS2RAAWQIBPFFCB63/state.json","well_known_bundle":"https://pith.science/.well-known/pith/P3WZLH6UGBS2RAAWQIBPFFCB63/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:P3WZLH6UGBS2RAAWQIBPFFCB63","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":"d82052d8e2725e5ab7d29bb17d97899e825fdcfde8528aba46e5acd31b74d52c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-08-13T12:37:19Z","title_canon_sha256":"f8bdcb7532b16c029eedd7df92d72b7c51b7a26cfca855fcdb2d7989c234f38f"},"schema_version":"1.0","source":{"id":"1808.04175","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.04175","created_at":"2026-05-17T23:59:32Z"},{"alias_kind":"arxiv_version","alias_value":"1808.04175v2","created_at":"2026-05-17T23:59:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.04175","created_at":"2026-05-17T23:59:32Z"},{"alias_kind":"pith_short_12","alias_value":"P3WZLH6UGBS2","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_16","alias_value":"P3WZLH6UGBS2RAAW","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_8","alias_value":"P3WZLH6U","created_at":"2026-05-18T12:32:43Z"}],"graph_snapshots":[{"event_id":"sha256:79168666ab3d07141f03a76484d8e9352c6c012d754ae987135ddb90988c210c","target":"graph","created_at":"2026-05-17T23:59:32Z","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":"Compact interferometers, called phasemeters, make it possible to operate over a large range while ensuring a high resolution. Such performance is required for the stabilization of large instruments dedicated to experimental physics such as gravitational wave detectors. This paper aims at presenting the working principle of the different types of phasemeters developed in the literature. These devices can be classified into two categories: homodyne and heterodyne interferometers. Improvement of resolution and accuracy has been studied for both devices. Resolution is related to the noise sources ","authors_text":"Binlei Ding, Christophe Collette, Conor M. Mow-Lowry, Jennifer Watchi, Sam Cooper","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-08-13T12:37:19Z","title":"A Review of Compact Interferometers"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.04175","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":"sha256:2d615b8bdec1ec6a914aabfca7d1b3647e92a4e0295ce6d3fbfbdc4fa3b5ca8b","target":"record","created_at":"2026-05-17T23:59:32Z","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":"d82052d8e2725e5ab7d29bb17d97899e825fdcfde8528aba46e5acd31b74d52c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-08-13T12:37:19Z","title_canon_sha256":"f8bdcb7532b16c029eedd7df92d72b7c51b7a26cfca855fcdb2d7989c234f38f"},"schema_version":"1.0","source":{"id":"1808.04175","kind":"arxiv","version":2}},"canonical_sha256":"7eed959fd43065a880168202f29441f6f7f07c9d16067b73d8479d001afaf338","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7eed959fd43065a880168202f29441f6f7f07c9d16067b73d8479d001afaf338","first_computed_at":"2026-05-17T23:59:32.306204Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:59:32.306204Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"eUIDbW/l4/BLpkoe7eEDGRlDow6BLJsRE6NpDkaRbc5P3tCN1CFXbEnrCnSYnR4edxnfY427HFcE3Ve/zOm3CQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:59:32.306828Z","signed_message":"canonical_sha256_bytes"},"source_id":"1808.04175","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2d615b8bdec1ec6a914aabfca7d1b3647e92a4e0295ce6d3fbfbdc4fa3b5ca8b","sha256:79168666ab3d07141f03a76484d8e9352c6c012d754ae987135ddb90988c210c"],"state_sha256":"c9b32d4a936c3f916eca95dc4846b75a6b33f8b461d3fa931d7fff507cd92f1f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0tXH3UV1ZAC8CpPa778rT6RF/rkM5TW+VjYO09azvin+kYhn80jQ7oxDwASYFZoHfitCUNAzxE97WfPfPdCuBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T03:49:16.530541Z","bundle_sha256":"22a9e84479218a44938bf7becf2ab72cc4a785027af976baaeba67f09f31e8ec"}}