{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:X3UDQ4SEP2Y634CA7AIWCCT6EC","short_pith_number":"pith:X3UDQ4SE","canonical_record":{"source":{"id":"2206.08715","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2022-06-17T12:14:21Z","cross_cats_sorted":["physics.app-ph","quant-ph"],"title_canon_sha256":"7da0db7e90eb1a8012cc3ca6357c81608ecea66312d43e4590c8e226b278e383","abstract_canon_sha256":"1e1a6e8dabcc7598f3218cfe1ebae3173ea69c73ca68a2c13010f6aea9b82a24"},"schema_version":"1.0"},"canonical_sha256":"bee83872447eb1edf040f811610a7e20acbb9e27d0497057456334976a428404","source":{"kind":"arxiv","id":"2206.08715","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2206.08715","created_at":"2026-07-05T06:16:46Z"},{"alias_kind":"arxiv_version","alias_value":"2206.08715v1","created_at":"2026-07-05T06:16:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2206.08715","created_at":"2026-07-05T06:16:46Z"},{"alias_kind":"pith_short_12","alias_value":"X3UDQ4SEP2Y6","created_at":"2026-07-05T06:16:46Z"},{"alias_kind":"pith_short_16","alias_value":"X3UDQ4SEP2Y634CA","created_at":"2026-07-05T06:16:46Z"},{"alias_kind":"pith_short_8","alias_value":"X3UDQ4SE","created_at":"2026-07-05T06:16:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:X3UDQ4SEP2Y634CA7AIWCCT6EC","target":"record","payload":{"canonical_record":{"source":{"id":"2206.08715","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2022-06-17T12:14:21Z","cross_cats_sorted":["physics.app-ph","quant-ph"],"title_canon_sha256":"7da0db7e90eb1a8012cc3ca6357c81608ecea66312d43e4590c8e226b278e383","abstract_canon_sha256":"1e1a6e8dabcc7598f3218cfe1ebae3173ea69c73ca68a2c13010f6aea9b82a24"},"schema_version":"1.0"},"canonical_sha256":"bee83872447eb1edf040f811610a7e20acbb9e27d0497057456334976a428404","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T06:16:46.547414Z","signature_b64":"y7xcKYUWmC+uAr4M68BS0m4T7ZQUIZvbw3zN8M6Eb6knQ+uGuPrZBvbKY7uYJNPGdXQdC+BuCdLYyUn6svYjCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bee83872447eb1edf040f811610a7e20acbb9e27d0497057456334976a428404","last_reissued_at":"2026-07-05T06:16:46.546929Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T06:16:46.546929Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2206.08715","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":"2026-07-05T06:16:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yZdb/6M89wz2TQDvfZMA2uDhceqmm3HLqaLnc2QbdtXuZsSlsNCgtiwhwLxvECGN1AbA3dUE89bvKo3UNmiCDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T22:53:10.490253Z"},"content_sha256":"63583959877a008d3c45f8ec6c11872b71302a608e05947bf0b13186b1b91e54","schema_version":"1.0","event_id":"sha256:63583959877a008d3c45f8ec6c11872b71302a608e05947bf0b13186b1b91e54"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:X3UDQ4SEP2Y634CA7AIWCCT6EC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Fully on-chip photonic turnkey quantum source for entangled qubit/qudit state generation","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["physics.app-ph","quant-ph"],"primary_cat":"physics.optics","authors_text":"Albert van Rees, Anahita Khodadad Kashi, Hatam Mahmudlu, J\\\"orn P. Epping, Klaus-J. Boller, Michael Kues, Raktim Haldar, Robert Johanning","submitted_at":"2022-06-17T12:14:21Z","abstract_excerpt":"Integrated photonics has recently become a leading platform for the realization and processing of optical entangled quantum states in compact, robust and scalable chip formats with applications in long-distance quantum-secured communication, quantum-accelerated information processing and non-classical metrology. However, the quantum light sources developed so far have relied on external bulky excitation lasers making them impractical, not reproducible prototype devices, hindering scalability and the transfer out of the lab into real-world applications. Here we demonstrate a fully integrated qu"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2206.08715","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/2206.08715/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":"2026-07-05T06:16:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fGfMxMBKZBx6BcokNe+KM1EE1/ks23YclniYkooT/r/7kr0aq+mIQd5XDCyI3cO57bXP3srqPIDJJgL6gVDrAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T22:53:10.490760Z"},"content_sha256":"6b3812b7142440d93678b389c88af06fc2696eb3b079a563e793366921bede02","schema_version":"1.0","event_id":"sha256:6b3812b7142440d93678b389c88af06fc2696eb3b079a563e793366921bede02"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/X3UDQ4SEP2Y634CA7AIWCCT6EC/bundle.json","state_url":"https://pith.science/pith/X3UDQ4SEP2Y634CA7AIWCCT6EC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/X3UDQ4SEP2Y634CA7AIWCCT6EC/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":"2026-08-05T22:53:10Z","links":{"resolver":"https://pith.science/pith/X3UDQ4SEP2Y634CA7AIWCCT6EC","bundle":"https://pith.science/pith/X3UDQ4SEP2Y634CA7AIWCCT6EC/bundle.json","state":"https://pith.science/pith/X3UDQ4SEP2Y634CA7AIWCCT6EC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/X3UDQ4SEP2Y634CA7AIWCCT6EC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:X3UDQ4SEP2Y634CA7AIWCCT6EC","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":"1e1a6e8dabcc7598f3218cfe1ebae3173ea69c73ca68a2c13010f6aea9b82a24","cross_cats_sorted":["physics.app-ph","quant-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2022-06-17T12:14:21Z","title_canon_sha256":"7da0db7e90eb1a8012cc3ca6357c81608ecea66312d43e4590c8e226b278e383"},"schema_version":"1.0","source":{"id":"2206.08715","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2206.08715","created_at":"2026-07-05T06:16:46Z"},{"alias_kind":"arxiv_version","alias_value":"2206.08715v1","created_at":"2026-07-05T06:16:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2206.08715","created_at":"2026-07-05T06:16:46Z"},{"alias_kind":"pith_short_12","alias_value":"X3UDQ4SEP2Y6","created_at":"2026-07-05T06:16:46Z"},{"alias_kind":"pith_short_16","alias_value":"X3UDQ4SEP2Y634CA","created_at":"2026-07-05T06:16:46Z"},{"alias_kind":"pith_short_8","alias_value":"X3UDQ4SE","created_at":"2026-07-05T06:16:46Z"}],"graph_snapshots":[{"event_id":"sha256:6b3812b7142440d93678b389c88af06fc2696eb3b079a563e793366921bede02","target":"graph","created_at":"2026-07-05T06:16:46Z","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/2206.08715/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Integrated photonics has recently become a leading platform for the realization and processing of optical entangled quantum states in compact, robust and scalable chip formats with applications in long-distance quantum-secured communication, quantum-accelerated information processing and non-classical metrology. However, the quantum light sources developed so far have relied on external bulky excitation lasers making them impractical, not reproducible prototype devices, hindering scalability and the transfer out of the lab into real-world applications. Here we demonstrate a fully integrated qu","authors_text":"Albert van Rees, Anahita Khodadad Kashi, Hatam Mahmudlu, J\\\"orn P. Epping, Klaus-J. Boller, Michael Kues, Raktim Haldar, Robert Johanning","cross_cats":["physics.app-ph","quant-ph"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2022-06-17T12:14:21Z","title":"Fully on-chip photonic turnkey quantum source for entangled qubit/qudit state generation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2206.08715","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":"sha256:63583959877a008d3c45f8ec6c11872b71302a608e05947bf0b13186b1b91e54","target":"record","created_at":"2026-07-05T06:16:46Z","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":"1e1a6e8dabcc7598f3218cfe1ebae3173ea69c73ca68a2c13010f6aea9b82a24","cross_cats_sorted":["physics.app-ph","quant-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2022-06-17T12:14:21Z","title_canon_sha256":"7da0db7e90eb1a8012cc3ca6357c81608ecea66312d43e4590c8e226b278e383"},"schema_version":"1.0","source":{"id":"2206.08715","kind":"arxiv","version":1}},"canonical_sha256":"bee83872447eb1edf040f811610a7e20acbb9e27d0497057456334976a428404","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bee83872447eb1edf040f811610a7e20acbb9e27d0497057456334976a428404","first_computed_at":"2026-07-05T06:16:46.546929Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T06:16:46.546929Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"y7xcKYUWmC+uAr4M68BS0m4T7ZQUIZvbw3zN8M6Eb6knQ+uGuPrZBvbKY7uYJNPGdXQdC+BuCdLYyUn6svYjCw==","signature_status":"signed_v1","signed_at":"2026-07-05T06:16:46.547414Z","signed_message":"canonical_sha256_bytes"},"source_id":"2206.08715","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:63583959877a008d3c45f8ec6c11872b71302a608e05947bf0b13186b1b91e54","sha256:6b3812b7142440d93678b389c88af06fc2696eb3b079a563e793366921bede02"],"state_sha256":"c567a90b5f8d08b35164c8677e72db966edefee059c8e384f20f70b565cb26aa"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XhzyI5aGGXTCySXMqhCEK1wqoD0XzoxJe8LPp74hB4ZaYG7LBI8I9DAepYr5Loj5qe9SP+NfG9+6Q8Y9RycYAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T22:53:10.494383Z","bundle_sha256":"4a6d00ea2157969c023888d7005a9570480aca55067a6cab6c67b60e5e7b7f01"}}