{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:GBMY2CTRNOSR4OG7BUQP3FZVVS","short_pith_number":"pith:GBMY2CTR","canonical_record":{"source":{"id":"2607.16575","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2026-07-18T01:20:20Z","cross_cats_sorted":["quant-ph"],"title_canon_sha256":"96230a53cb6b088871165292931550a356f049280303459133b3cd67d65212c7","abstract_canon_sha256":"cd414ca5c11646e4dba775bad479f6822e14b803ff8f6129dcb3db829d893071"},"schema_version":"1.0"},"canonical_sha256":"30598d0a716ba51e38df0d20fd9735ac997901dff5020ed8eae4a810b5a717a8","source":{"kind":"arxiv","id":"2607.16575","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.16575","created_at":"2026-07-21T00:20:26Z"},{"alias_kind":"arxiv_version","alias_value":"2607.16575v1","created_at":"2026-07-21T00:20:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.16575","created_at":"2026-07-21T00:20:26Z"},{"alias_kind":"pith_short_12","alias_value":"GBMY2CTRNOSR","created_at":"2026-07-21T00:20:26Z"},{"alias_kind":"pith_short_16","alias_value":"GBMY2CTRNOSR4OG7","created_at":"2026-07-21T00:20:26Z"},{"alias_kind":"pith_short_8","alias_value":"GBMY2CTR","created_at":"2026-07-21T00:20:26Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:GBMY2CTRNOSR4OG7BUQP3FZVVS","target":"record","payload":{"canonical_record":{"source":{"id":"2607.16575","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2026-07-18T01:20:20Z","cross_cats_sorted":["quant-ph"],"title_canon_sha256":"96230a53cb6b088871165292931550a356f049280303459133b3cd67d65212c7","abstract_canon_sha256":"cd414ca5c11646e4dba775bad479f6822e14b803ff8f6129dcb3db829d893071"},"schema_version":"1.0"},"canonical_sha256":"30598d0a716ba51e38df0d20fd9735ac997901dff5020ed8eae4a810b5a717a8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-21T00:20:26.256967Z","signature_b64":"qaO0LUznOjRPe0usk2/vFOSxukfKC/JFGpY0V/qjdcDkIbfmNHynMSvsBzsATTdjlAk3N/WpjFdlL6WTSwrzAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"30598d0a716ba51e38df0d20fd9735ac997901dff5020ed8eae4a810b5a717a8","last_reissued_at":"2026-07-21T00:20:26.256135Z","signature_status":"signed_v1","first_computed_at":"2026-07-21T00:20:26.256135Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2607.16575","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-21T00:20:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/YGgvrUjOHCTS1cpKPW0dmg+zp6qCWW/flEKwAQQSbEUidVgx6yGb3aFURTG9/I7jk51URQGvACFkPEXJI2fBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-09T23:41:41.103140Z"},"content_sha256":"d784539ad3d6cb581d447fe0f54034e919cb258b9a51089f4c71bd96b4689158","schema_version":"1.0","event_id":"sha256:d784539ad3d6cb581d447fe0f54034e919cb258b9a51089f4c71bd96b4689158"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:GBMY2CTRNOSR4OG7BUQP3FZVVS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"80 Channel Photon Pair Source from a Thin-Film Lithium Niobate Racetrack Microresonator","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["quant-ph"],"primary_cat":"physics.optics","authors_text":"Chun-Ho Lee, Clayton Cheung, Ian Christen, Kai-Chi Chang, Mengjie Yu, Mihir Chaudhari, Reshma Kopparapu, Tushar Sanjay Karnik, Xinyi Ren","submitted_at":"2026-07-18T01:20:20Z","abstract_excerpt":"Nanophotonic platforms have multiple properties and features desirable for producing correlated photon pairs. In these platforms, spontaneous parametric down-conversion (SPDC) and spontaneous four-wave-mixing (SFWM) have been used to achieve photon pair production. By placing the nonlinear region in a resonant cavity, the source obtains an enhanced nonlinear interaction and naturally filters out photons by frequency according to the cavity linewidth. Among various platforms, X-cut thin-film lithium niobate (TFLN) stands out for its strong second-order optical nonlinearity ($\\chi^{(2)}$) and ac"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.16575","kind":"arxiv","version":1},"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/2607.16575/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":"2026-07-21T00:20:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZisRFLw/1ryQAGKTRnPlCA5C03c7e8UntHL66md3i6O3rmkJseN91t2jhfN7X6Q29hr34U7MHOl/isq21QhlCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-09T23:41:41.104504Z"},"content_sha256":"d659be664ea59cde469e654775d3a145c90a8c37864876f63be92bc0647a8a45","schema_version":"1.0","event_id":"sha256:d659be664ea59cde469e654775d3a145c90a8c37864876f63be92bc0647a8a45"},{"event_type":"integrity_finding","subject_pith_number":"pith:2026:GBMY2CTRNOSR4OG7BUQP3FZVVS","target":"integrity","payload":{"note":"DOI in the printed bibliography is fragmented by whitespace or line breaks. A longer candidate (10.1038/s41467-024-50062-0) was visible in the surrounding text but could not be confirmed against doi.org as printed.","snippet":"author author C. Chen , author J.-Y. \\ Yan , author H.-G. \\ Babin , author J. Wang , author X. Xu , author X. Lin , author Q. Yu , author W. Fang , author R.-Z. \\ Liu , author Y.-H. \\ Huo , author H. Cai , author W. E. I. \\ Sha , author J. ","arxiv_id":"2607.16575","detector":"doi_compliance","evidence":{"ref_index":90,"verdict_class":"incontrovertible","resolved_title":null,"printed_excerpt":"10.1038/s41467-024-500","reconstructed_doi":"10.1038/s41467-024-50062-0"},"severity":"advisory","ref_index":90,"audited_at":"2026-08-01T20:39:16.862697Z","event_type":"pith.integrity.v1","detected_doi":"10.1038/s41467-024-50062-0","detector_url":"https://pith.science/pith-integrity-protocol#doi_compliance","external_url":null,"finding_type":"recoverable_identifier","evidence_hash":"9d021c8aaa1c07338351368cff9ed743f6290c29fdadd83c7b866af1c67b0325","paper_version":1,"verdict_class":"incontrovertible","resolved_title":null,"detector_version":"1.1.0","detected_arxiv_id":null,"integrity_event_id":16578,"payload_sha256":"007fca2ec262411fc7224936e20b635dd86d157614dadcee16d029c89ed3a9d2","signature_b64":"zuXAWAl79Z07bp17WhCRmdcLbBKTMZLoNIFPwnaimWlpQkOUt4XqdFiWvkBkFJMcA7bKDZd+AAloHycS3AzvAw==","signing_key_id":"pith-v1-2026-05"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-08-01T20:43:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gXY2MUFelAX/sydVcsaKTa+LLyHHEzUNqH2YivGhAAaLrXctp0/M6K+QmzdhpamJAWWq566GgA3sLx04PHCzCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-09T23:41:41.117652Z"},"content_sha256":"bc5809ffc5043bee9b0e3da656db53ad1198479a16d2d6666b092780e5b7d3b8","schema_version":"1.0","event_id":"sha256:bc5809ffc5043bee9b0e3da656db53ad1198479a16d2d6666b092780e5b7d3b8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GBMY2CTRNOSR4OG7BUQP3FZVVS/bundle.json","state_url":"https://pith.science/pith/GBMY2CTRNOSR4OG7BUQP3FZVVS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GBMY2CTRNOSR4OG7BUQP3FZVVS/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":"2026-08-09T23:41:41Z","links":{"resolver":"https://pith.science/pith/GBMY2CTRNOSR4OG7BUQP3FZVVS","bundle":"https://pith.science/pith/GBMY2CTRNOSR4OG7BUQP3FZVVS/bundle.json","state":"https://pith.science/pith/GBMY2CTRNOSR4OG7BUQP3FZVVS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GBMY2CTRNOSR4OG7BUQP3FZVVS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:GBMY2CTRNOSR4OG7BUQP3FZVVS","merge_version":"pith-open-graph-merge-v1","event_count":3,"valid_event_count":3,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"cd414ca5c11646e4dba775bad479f6822e14b803ff8f6129dcb3db829d893071","cross_cats_sorted":["quant-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2026-07-18T01:20:20Z","title_canon_sha256":"96230a53cb6b088871165292931550a356f049280303459133b3cd67d65212c7"},"schema_version":"1.0","source":{"id":"2607.16575","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.16575","created_at":"2026-07-21T00:20:26Z"},{"alias_kind":"arxiv_version","alias_value":"2607.16575v1","created_at":"2026-07-21T00:20:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.16575","created_at":"2026-07-21T00:20:26Z"},{"alias_kind":"pith_short_12","alias_value":"GBMY2CTRNOSR","created_at":"2026-07-21T00:20:26Z"},{"alias_kind":"pith_short_16","alias_value":"GBMY2CTRNOSR4OG7","created_at":"2026-07-21T00:20:26Z"},{"alias_kind":"pith_short_8","alias_value":"GBMY2CTR","created_at":"2026-07-21T00:20:26Z"}],"graph_snapshots":[{"event_id":"sha256:d659be664ea59cde469e654775d3a145c90a8c37864876f63be92bc0647a8a45","target":"graph","created_at":"2026-07-21T00:20:26Z","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/2607.16575/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Nanophotonic platforms have multiple properties and features desirable for producing correlated photon pairs. In these platforms, spontaneous parametric down-conversion (SPDC) and spontaneous four-wave-mixing (SFWM) have been used to achieve photon pair production. By placing the nonlinear region in a resonant cavity, the source obtains an enhanced nonlinear interaction and naturally filters out photons by frequency according to the cavity linewidth. Among various platforms, X-cut thin-film lithium niobate (TFLN) stands out for its strong second-order optical nonlinearity ($\\chi^{(2)}$) and ac","authors_text":"Chun-Ho Lee, Clayton Cheung, Ian Christen, Kai-Chi Chang, Mengjie Yu, Mihir Chaudhari, Reshma Kopparapu, Tushar Sanjay Karnik, Xinyi Ren","cross_cats":["quant-ph"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2026-07-18T01:20:20Z","title":"80 Channel Photon Pair Source from a Thin-Film Lithium Niobate Racetrack Microresonator"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.16575","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:d784539ad3d6cb581d447fe0f54034e919cb258b9a51089f4c71bd96b4689158","target":"record","created_at":"2026-07-21T00:20:26Z","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":"cd414ca5c11646e4dba775bad479f6822e14b803ff8f6129dcb3db829d893071","cross_cats_sorted":["quant-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2026-07-18T01:20:20Z","title_canon_sha256":"96230a53cb6b088871165292931550a356f049280303459133b3cd67d65212c7"},"schema_version":"1.0","source":{"id":"2607.16575","kind":"arxiv","version":1}},"canonical_sha256":"30598d0a716ba51e38df0d20fd9735ac997901dff5020ed8eae4a810b5a717a8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"30598d0a716ba51e38df0d20fd9735ac997901dff5020ed8eae4a810b5a717a8","first_computed_at":"2026-07-21T00:20:26.256135Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-21T00:20:26.256135Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"qaO0LUznOjRPe0usk2/vFOSxukfKC/JFGpY0V/qjdcDkIbfmNHynMSvsBzsATTdjlAk3N/WpjFdlL6WTSwrzAA==","signature_status":"signed_v1","signed_at":"2026-07-21T00:20:26.256967Z","signed_message":"canonical_sha256_bytes"},"source_id":"2607.16575","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d784539ad3d6cb581d447fe0f54034e919cb258b9a51089f4c71bd96b4689158","sha256:d659be664ea59cde469e654775d3a145c90a8c37864876f63be92bc0647a8a45","sha256:bc5809ffc5043bee9b0e3da656db53ad1198479a16d2d6666b092780e5b7d3b8"],"state_sha256":"82c3bbd469c25fcf1cba1a75f1c6969f34323a601c77ee8b8f0d01b7a08fd2a0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"C73CK+RtKTq3R/i6jPx3lqloaBxg0LgnXpzMLzfUeWovps4najzkFBNM7g8lkpWR8RM+WUgesHKLi5GPlz5ZAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-09T23:41:41.123644Z","bundle_sha256":"e4310bce344d849592f2071f4aa2686d078ceafdb93e1359fa20335178fb7ea2"}}