{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:NLIX4EV3EZNGYYS6KPF3H2IXOI","short_pith_number":"pith:NLIX4EV3","canonical_record":{"source":{"id":"2012.05673","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2020-12-10T13:56:14Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"260e130ebe131180918019b6186cc9ea140b22955cba0a30f3597335b276b25a","abstract_canon_sha256":"1f0cec900c23b53141d6a473071fccda16cdc4c48fd1a09109a7b46d80261c97"},"schema_version":"1.0"},"canonical_sha256":"6ad17e12bb265a6c625e53cbb3e917722a68da33552bf292720a7961957d1159","source":{"kind":"arxiv","id":"2012.05673","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2012.05673","created_at":"2026-07-05T03:07:45Z"},{"alias_kind":"arxiv_version","alias_value":"2012.05673v1","created_at":"2026-07-05T03:07:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2012.05673","created_at":"2026-07-05T03:07:45Z"},{"alias_kind":"pith_short_12","alias_value":"NLIX4EV3EZNG","created_at":"2026-07-05T03:07:45Z"},{"alias_kind":"pith_short_16","alias_value":"NLIX4EV3EZNGYYS6","created_at":"2026-07-05T03:07:45Z"},{"alias_kind":"pith_short_8","alias_value":"NLIX4EV3","created_at":"2026-07-05T03:07:45Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:NLIX4EV3EZNGYYS6KPF3H2IXOI","target":"record","payload":{"canonical_record":{"source":{"id":"2012.05673","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2020-12-10T13:56:14Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"260e130ebe131180918019b6186cc9ea140b22955cba0a30f3597335b276b25a","abstract_canon_sha256":"1f0cec900c23b53141d6a473071fccda16cdc4c48fd1a09109a7b46d80261c97"},"schema_version":"1.0"},"canonical_sha256":"6ad17e12bb265a6c625e53cbb3e917722a68da33552bf292720a7961957d1159","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:07:45.554022Z","signature_b64":"u6n/f84jY68G9QK4UENv1VZlYWTB0uchhEvVJdLBfEIW0vbwnJ1nTofFAWLbWQMJnUNOHly9H9Pk3QQb6JJiDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6ad17e12bb265a6c625e53cbb3e917722a68da33552bf292720a7961957d1159","last_reissued_at":"2026-07-05T03:07:45.553673Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:07:45.553673Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2012.05673","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":"2026-07-05T03:07:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RcL+rZs9t7F2UpJxGqtrg4+/Z7hWBAXyjyqa1FvaLNuVKl+YqJlLfDrvnpvVROterbN0NNV8rhctzfw8P/NPDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T09:03:46.738966Z"},"content_sha256":"1c6a15863b3016135b6404daf11977484bb7dd0ee682e5fdc03f6d8acca273ea","schema_version":"1.0","event_id":"sha256:1c6a15863b3016135b6404daf11977484bb7dd0ee682e5fdc03f6d8acca273ea"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:NLIX4EV3EZNGYYS6KPF3H2IXOI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A 12-mode Universal Photonic Processor for Quantum Information Processing","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.optics"],"primary_cat":"quant-ph","authors_text":"Ben Kassenberg, Caterina Taballione, Chris Toebes, Hans van den Vlekkert, Henk J. Snijders, Jelmer J. Renema, J\\\"orn P. Epping, Michiel de Goede, Pepijn W.H. Pinkse, Peter Hooijschuur, Pim Venderbosch, Reinier van der Meer","submitted_at":"2020-12-10T13:56:14Z","abstract_excerpt":"Photonic processors are pivotal for both quantum and classical information processing tasks using light. In particular, linear optical quantum information processing requires both largescale and low-loss programmable photonic processors. In this paper, we report the demonstration of the largest universal quantum photonic processor to date: a low-loss, 12-mode fully tunable linear interferometer with all-to-all coupling based on stoichiometric silicon nitride waveguides."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2012.05673","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/2012.05673/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":"2026-07-05T03:07:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uxwPrpFmFrwd+CVsxBE3wB1YOHa3RMmX3j+ktKG8+n76zFCfSE23YT8Xlx52wqYY2lNlyjc2dXHHIa4LixviAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T09:03:46.739338Z"},"content_sha256":"90076c1c24bbf9511a0e2106358305b33e2596b28ce36140fdfa72718a61ea48","schema_version":"1.0","event_id":"sha256:90076c1c24bbf9511a0e2106358305b33e2596b28ce36140fdfa72718a61ea48"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NLIX4EV3EZNGYYS6KPF3H2IXOI/bundle.json","state_url":"https://pith.science/pith/NLIX4EV3EZNGYYS6KPF3H2IXOI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NLIX4EV3EZNGYYS6KPF3H2IXOI/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":"2026-07-07T09:03:46Z","links":{"resolver":"https://pith.science/pith/NLIX4EV3EZNGYYS6KPF3H2IXOI","bundle":"https://pith.science/pith/NLIX4EV3EZNGYYS6KPF3H2IXOI/bundle.json","state":"https://pith.science/pith/NLIX4EV3EZNGYYS6KPF3H2IXOI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NLIX4EV3EZNGYYS6KPF3H2IXOI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:NLIX4EV3EZNGYYS6KPF3H2IXOI","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":"1f0cec900c23b53141d6a473071fccda16cdc4c48fd1a09109a7b46d80261c97","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2020-12-10T13:56:14Z","title_canon_sha256":"260e130ebe131180918019b6186cc9ea140b22955cba0a30f3597335b276b25a"},"schema_version":"1.0","source":{"id":"2012.05673","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2012.05673","created_at":"2026-07-05T03:07:45Z"},{"alias_kind":"arxiv_version","alias_value":"2012.05673v1","created_at":"2026-07-05T03:07:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2012.05673","created_at":"2026-07-05T03:07:45Z"},{"alias_kind":"pith_short_12","alias_value":"NLIX4EV3EZNG","created_at":"2026-07-05T03:07:45Z"},{"alias_kind":"pith_short_16","alias_value":"NLIX4EV3EZNGYYS6","created_at":"2026-07-05T03:07:45Z"},{"alias_kind":"pith_short_8","alias_value":"NLIX4EV3","created_at":"2026-07-05T03:07:45Z"}],"graph_snapshots":[{"event_id":"sha256:90076c1c24bbf9511a0e2106358305b33e2596b28ce36140fdfa72718a61ea48","target":"graph","created_at":"2026-07-05T03:07:45Z","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/2012.05673/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Photonic processors are pivotal for both quantum and classical information processing tasks using light. In particular, linear optical quantum information processing requires both largescale and low-loss programmable photonic processors. In this paper, we report the demonstration of the largest universal quantum photonic processor to date: a low-loss, 12-mode fully tunable linear interferometer with all-to-all coupling based on stoichiometric silicon nitride waveguides.","authors_text":"Ben Kassenberg, Caterina Taballione, Chris Toebes, Hans van den Vlekkert, Henk J. Snijders, Jelmer J. Renema, J\\\"orn P. Epping, Michiel de Goede, Pepijn W.H. Pinkse, Peter Hooijschuur, Pim Venderbosch, Reinier van der Meer","cross_cats":["physics.optics"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2020-12-10T13:56:14Z","title":"A 12-mode Universal Photonic Processor for Quantum Information Processing"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2012.05673","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":"sha256:1c6a15863b3016135b6404daf11977484bb7dd0ee682e5fdc03f6d8acca273ea","target":"record","created_at":"2026-07-05T03:07:45Z","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":"1f0cec900c23b53141d6a473071fccda16cdc4c48fd1a09109a7b46d80261c97","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2020-12-10T13:56:14Z","title_canon_sha256":"260e130ebe131180918019b6186cc9ea140b22955cba0a30f3597335b276b25a"},"schema_version":"1.0","source":{"id":"2012.05673","kind":"arxiv","version":1}},"canonical_sha256":"6ad17e12bb265a6c625e53cbb3e917722a68da33552bf292720a7961957d1159","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6ad17e12bb265a6c625e53cbb3e917722a68da33552bf292720a7961957d1159","first_computed_at":"2026-07-05T03:07:45.553673Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:07:45.553673Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"u6n/f84jY68G9QK4UENv1VZlYWTB0uchhEvVJdLBfEIW0vbwnJ1nTofFAWLbWQMJnUNOHly9H9Pk3QQb6JJiDw==","signature_status":"signed_v1","signed_at":"2026-07-05T03:07:45.554022Z","signed_message":"canonical_sha256_bytes"},"source_id":"2012.05673","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1c6a15863b3016135b6404daf11977484bb7dd0ee682e5fdc03f6d8acca273ea","sha256:90076c1c24bbf9511a0e2106358305b33e2596b28ce36140fdfa72718a61ea48"],"state_sha256":"2a7b4e85f88c838c29e3e239a9459872bf696ae6c4d8c68adf9501a8e6d5e042"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RXvcGyGllGvwYBRywVvS+VHF62APF6odnIiWCL3j4Y5DWLeqASslVUHYAN94PyU8B9+yP29iRM/fDapR6+cSAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T09:03:46.741252Z","bundle_sha256":"6eb85ecd832e0040fb8d881c7dd959a2cb5b2d8db50347bf40ab37fdd2c2315e"}}