{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:SD6F3O22H4VK2DCVJV5M3DWDCL","short_pith_number":"pith:SD6F3O22","canonical_record":{"source":{"id":"2002.07708","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2020-02-17T16:08:51Z","cross_cats_sorted":["physics.atom-ph","physics.optics"],"title_canon_sha256":"67947863d6ffb0a826cc8c81099db6732539e026092a24651f7cfba57a9a993f","abstract_canon_sha256":"59baf1185eead386717ef4da551ef8740c5b22f1cc81fa5b23475398e476beef"},"schema_version":"1.0"},"canonical_sha256":"90fc5dbb5a3f2aad0c554d7acd8ec312f8e9c3bc2418b9fd7ed403a56986239e","source":{"kind":"arxiv","id":"2002.07708","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2002.07708","created_at":"2026-07-05T00:53:53Z"},{"alias_kind":"arxiv_version","alias_value":"2002.07708v2","created_at":"2026-07-05T00:53:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2002.07708","created_at":"2026-07-05T00:53:53Z"},{"alias_kind":"pith_short_12","alias_value":"SD6F3O22H4VK","created_at":"2026-07-05T00:53:53Z"},{"alias_kind":"pith_short_16","alias_value":"SD6F3O22H4VK2DCV","created_at":"2026-07-05T00:53:53Z"},{"alias_kind":"pith_short_8","alias_value":"SD6F3O22","created_at":"2026-07-05T00:53:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:SD6F3O22H4VK2DCVJV5M3DWDCL","target":"record","payload":{"canonical_record":{"source":{"id":"2002.07708","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2020-02-17T16:08:51Z","cross_cats_sorted":["physics.atom-ph","physics.optics"],"title_canon_sha256":"67947863d6ffb0a826cc8c81099db6732539e026092a24651f7cfba57a9a993f","abstract_canon_sha256":"59baf1185eead386717ef4da551ef8740c5b22f1cc81fa5b23475398e476beef"},"schema_version":"1.0"},"canonical_sha256":"90fc5dbb5a3f2aad0c554d7acd8ec312f8e9c3bc2418b9fd7ed403a56986239e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:53:53.192425Z","signature_b64":"/0uz3lV0Wp367dugwYch90olrrdotegXhFCXe1E2BpCQNCgsk1UEgBhQl947PXfmLlqAmubdFiTsl+g/qU4/Dw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"90fc5dbb5a3f2aad0c554d7acd8ec312f8e9c3bc2418b9fd7ed403a56986239e","last_reissued_at":"2026-07-05T00:53:53.191949Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:53:53.191949Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2002.07708","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":"2026-07-05T00:53:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EipC0scezGMxO6gKE88R1o8Tko2tAcWGh+9uVwY70DPmTyZfaN5gYFku5zAVczPgNS6gm0RkjpE2qEz1mraLAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-20T04:00:31.734506Z"},"content_sha256":"3d655973a06ab8f87a1f0089ebdbf34a92d8503a3970fd411c980fee66883811","schema_version":"1.0","event_id":"sha256:3d655973a06ab8f87a1f0089ebdbf34a92d8503a3970fd411c980fee66883811"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:SD6F3O22H4VK2DCVJV5M3DWDCL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Atomic line versus lens cavity filters: A comparison of their merits","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.atom-ph","physics.optics"],"primary_cat":"physics.ins-det","authors_text":"Clare R. Higgins, Danielle Pizzey, Ifan G. Hughes, Renju S. Mathew","submitted_at":"2020-02-17T16:08:51Z","abstract_excerpt":"We present a comparison between lens cavity filters and atomic line filters, discussing their relative merits for applications in quantum optics. We describe the design, characterization and stabilization procedure of a lens cavity filter, which consists of a high-reflection coated commercially available plano-convex lens, and compare it to an ultra-narrow atomic band-pass filter utilizing the D$_{2}$ absorption line in atomic rubidium vapor. We find that the cavity filter peak transmission frequency and bandwidth can be chosen arbitrarily but the transmission frequency is subject to thermal d"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2002.07708","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2002.07708/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T00:53:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zOgWKcGRffLtfkfThyj8MKYZC1VFOp90agdE3ncKnivU+F0o5SXd7s5uA4xIyrG40Co0pXtfIl3I03C/lyQcDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-20T04:00:31.735258Z"},"content_sha256":"f3126d066874ee409fe5e3cdf687eafc64c5e616af13250856123f23b1c37790","schema_version":"1.0","event_id":"sha256:f3126d066874ee409fe5e3cdf687eafc64c5e616af13250856123f23b1c37790"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SD6F3O22H4VK2DCVJV5M3DWDCL/bundle.json","state_url":"https://pith.science/pith/SD6F3O22H4VK2DCVJV5M3DWDCL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SD6F3O22H4VK2DCVJV5M3DWDCL/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":"2026-08-20T04:00:31Z","links":{"resolver":"https://pith.science/pith/SD6F3O22H4VK2DCVJV5M3DWDCL","bundle":"https://pith.science/pith/SD6F3O22H4VK2DCVJV5M3DWDCL/bundle.json","state":"https://pith.science/pith/SD6F3O22H4VK2DCVJV5M3DWDCL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SD6F3O22H4VK2DCVJV5M3DWDCL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:SD6F3O22H4VK2DCVJV5M3DWDCL","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":"59baf1185eead386717ef4da551ef8740c5b22f1cc81fa5b23475398e476beef","cross_cats_sorted":["physics.atom-ph","physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2020-02-17T16:08:51Z","title_canon_sha256":"67947863d6ffb0a826cc8c81099db6732539e026092a24651f7cfba57a9a993f"},"schema_version":"1.0","source":{"id":"2002.07708","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2002.07708","created_at":"2026-07-05T00:53:53Z"},{"alias_kind":"arxiv_version","alias_value":"2002.07708v2","created_at":"2026-07-05T00:53:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2002.07708","created_at":"2026-07-05T00:53:53Z"},{"alias_kind":"pith_short_12","alias_value":"SD6F3O22H4VK","created_at":"2026-07-05T00:53:53Z"},{"alias_kind":"pith_short_16","alias_value":"SD6F3O22H4VK2DCV","created_at":"2026-07-05T00:53:53Z"},{"alias_kind":"pith_short_8","alias_value":"SD6F3O22","created_at":"2026-07-05T00:53:53Z"}],"graph_snapshots":[{"event_id":"sha256:f3126d066874ee409fe5e3cdf687eafc64c5e616af13250856123f23b1c37790","target":"graph","created_at":"2026-07-05T00:53:53Z","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/2002.07708/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present a comparison between lens cavity filters and atomic line filters, discussing their relative merits for applications in quantum optics. We describe the design, characterization and stabilization procedure of a lens cavity filter, which consists of a high-reflection coated commercially available plano-convex lens, and compare it to an ultra-narrow atomic band-pass filter utilizing the D$_{2}$ absorption line in atomic rubidium vapor. We find that the cavity filter peak transmission frequency and bandwidth can be chosen arbitrarily but the transmission frequency is subject to thermal d","authors_text":"Clare R. Higgins, Danielle Pizzey, Ifan G. Hughes, Renju S. Mathew","cross_cats":["physics.atom-ph","physics.optics"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2020-02-17T16:08:51Z","title":"Atomic line versus lens cavity filters: A comparison of their merits"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2002.07708","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":"sha256:3d655973a06ab8f87a1f0089ebdbf34a92d8503a3970fd411c980fee66883811","target":"record","created_at":"2026-07-05T00:53:53Z","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":"59baf1185eead386717ef4da551ef8740c5b22f1cc81fa5b23475398e476beef","cross_cats_sorted":["physics.atom-ph","physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2020-02-17T16:08:51Z","title_canon_sha256":"67947863d6ffb0a826cc8c81099db6732539e026092a24651f7cfba57a9a993f"},"schema_version":"1.0","source":{"id":"2002.07708","kind":"arxiv","version":2}},"canonical_sha256":"90fc5dbb5a3f2aad0c554d7acd8ec312f8e9c3bc2418b9fd7ed403a56986239e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"90fc5dbb5a3f2aad0c554d7acd8ec312f8e9c3bc2418b9fd7ed403a56986239e","first_computed_at":"2026-07-05T00:53:53.191949Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:53:53.191949Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/0uz3lV0Wp367dugwYch90olrrdotegXhFCXe1E2BpCQNCgsk1UEgBhQl947PXfmLlqAmubdFiTsl+g/qU4/Dw==","signature_status":"signed_v1","signed_at":"2026-07-05T00:53:53.192425Z","signed_message":"canonical_sha256_bytes"},"source_id":"2002.07708","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3d655973a06ab8f87a1f0089ebdbf34a92d8503a3970fd411c980fee66883811","sha256:f3126d066874ee409fe5e3cdf687eafc64c5e616af13250856123f23b1c37790"],"state_sha256":"9cc461441e90b09c4348ee9416daefd84f9c970e75d92a3d9de843510446ce86"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pogZxAhP8huLcN6MrmcI9GqQaKY7iRWrmjoZxXm5J1LuAQ4xMTL+P7IzAG0kUDItZvMer1fD69KrVySG+B/FBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-20T04:00:31.741240Z","bundle_sha256":"194ee34b4da718f8d19f288975cbb2838b92c00d5b8c72ff0322e7aca7dee90f"}}