{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:CZBCWAAX7NOFIVWRWWK3LVHKMH","short_pith_number":"pith:CZBCWAAX","canonical_record":{"source":{"id":"0902.4357","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-02-25T12:44:56Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"7bf453bfdf19de941d4585c10db01dc7577ac35ae633b277b1a579142abd5182","abstract_canon_sha256":"d5fbf25ebf4a458f8e19c855340bc266f1ca23f18026be966cd5d66d932d8b15"},"schema_version":"1.0"},"canonical_sha256":"16422b0017fb5c5456d1b595b5d4ea61ca3e4676983cb88bb796d09d95f2981a","source":{"kind":"arxiv","id":"0902.4357","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0902.4357","created_at":"2026-05-18T04:20:23Z"},{"alias_kind":"arxiv_version","alias_value":"0902.4357v2","created_at":"2026-05-18T04:20:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0902.4357","created_at":"2026-05-18T04:20:23Z"},{"alias_kind":"pith_short_12","alias_value":"CZBCWAAX7NOF","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_16","alias_value":"CZBCWAAX7NOFIVWR","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_8","alias_value":"CZBCWAAX","created_at":"2026-05-18T12:25:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:CZBCWAAX7NOFIVWRWWK3LVHKMH","target":"record","payload":{"canonical_record":{"source":{"id":"0902.4357","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-02-25T12:44:56Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"7bf453bfdf19de941d4585c10db01dc7577ac35ae633b277b1a579142abd5182","abstract_canon_sha256":"d5fbf25ebf4a458f8e19c855340bc266f1ca23f18026be966cd5d66d932d8b15"},"schema_version":"1.0"},"canonical_sha256":"16422b0017fb5c5456d1b595b5d4ea61ca3e4676983cb88bb796d09d95f2981a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:20:23.519138Z","signature_b64":"put3i0qYjUCMz+O7hp1VZnaFVlAsai2i4XTi1HMoGvqQCE2CylpxYbipaZ7H0dN1d6QvU/lmr5r5E18IVHpoBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"16422b0017fb5c5456d1b595b5d4ea61ca3e4676983cb88bb796d09d95f2981a","last_reissued_at":"2026-05-18T04:20:23.518492Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:20:23.518492Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0902.4357","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":"2026-05-18T04:20:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"E2hvjh4NXO42PX/qlx0sTSmWxt/hGndADDLA0dqzFfnO17x3vxBk4+mil1MUgfwJ9XNy1vLtg2pWkfrzkYSxCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T15:01:24.066751Z"},"content_sha256":"a9ad80c64cd0388a2714cf9efd92be48abed3da56ad972fa2fccabba01b2450a","schema_version":"1.0","event_id":"sha256:a9ad80c64cd0388a2714cf9efd92be48abed3da56ad972fa2fccabba01b2450a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:CZBCWAAX7NOFIVWRWWK3LVHKMH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Laser written waveguide photonic quantum circuits","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.optics"],"primary_cat":"quant-ph","authors_text":"A. Politi, G. D. Marshall, J. C. F. Matthews, J. L. O'Brien, M. Ams, M. J. Withford, P. Dekker","submitted_at":"2009-02-25T12:44:56Z","abstract_excerpt":"We report photonic quantum circuits created using an ultrafast laser processing technique that is rapid, requires no lithographic mask and can be used to create three-dimensional networks of waveguide devices. We have characterized directional couplers--the key functional elements of photonic quantum circuits--and found that they perform as well as lithographically produced waveguide devices. We further demonstrate high-performance interferometers and an important multi-photon quantum interference phenomenon for the first time in integrated optics. This direct-write approach will enable the ra"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0902.4357","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":"2026-05-18T04:20:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9oTs5idhl2GKSUvaq+VSuVYg41RudzH9mb0SD8DonQRbdOSID1kgj+tRHGRlnA2iwQzvNe0eghSDtnGhJ3ixAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T15:01:24.067280Z"},"content_sha256":"839d6a886ac7131e295c74a9a0b73f75fe7c7551ed5c764fc7d60da4dd6b46e4","schema_version":"1.0","event_id":"sha256:839d6a886ac7131e295c74a9a0b73f75fe7c7551ed5c764fc7d60da4dd6b46e4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CZBCWAAX7NOFIVWRWWK3LVHKMH/bundle.json","state_url":"https://pith.science/pith/CZBCWAAX7NOFIVWRWWK3LVHKMH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CZBCWAAX7NOFIVWRWWK3LVHKMH/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":"2026-05-27T15:01:24Z","links":{"resolver":"https://pith.science/pith/CZBCWAAX7NOFIVWRWWK3LVHKMH","bundle":"https://pith.science/pith/CZBCWAAX7NOFIVWRWWK3LVHKMH/bundle.json","state":"https://pith.science/pith/CZBCWAAX7NOFIVWRWWK3LVHKMH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CZBCWAAX7NOFIVWRWWK3LVHKMH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:CZBCWAAX7NOFIVWRWWK3LVHKMH","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":"d5fbf25ebf4a458f8e19c855340bc266f1ca23f18026be966cd5d66d932d8b15","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-02-25T12:44:56Z","title_canon_sha256":"7bf453bfdf19de941d4585c10db01dc7577ac35ae633b277b1a579142abd5182"},"schema_version":"1.0","source":{"id":"0902.4357","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0902.4357","created_at":"2026-05-18T04:20:23Z"},{"alias_kind":"arxiv_version","alias_value":"0902.4357v2","created_at":"2026-05-18T04:20:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0902.4357","created_at":"2026-05-18T04:20:23Z"},{"alias_kind":"pith_short_12","alias_value":"CZBCWAAX7NOF","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_16","alias_value":"CZBCWAAX7NOFIVWR","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_8","alias_value":"CZBCWAAX","created_at":"2026-05-18T12:25:59Z"}],"graph_snapshots":[{"event_id":"sha256:839d6a886ac7131e295c74a9a0b73f75fe7c7551ed5c764fc7d60da4dd6b46e4","target":"graph","created_at":"2026-05-18T04:20:23Z","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":"We report photonic quantum circuits created using an ultrafast laser processing technique that is rapid, requires no lithographic mask and can be used to create three-dimensional networks of waveguide devices. We have characterized directional couplers--the key functional elements of photonic quantum circuits--and found that they perform as well as lithographically produced waveguide devices. We further demonstrate high-performance interferometers and an important multi-photon quantum interference phenomenon for the first time in integrated optics. This direct-write approach will enable the ra","authors_text":"A. Politi, G. D. Marshall, J. C. F. Matthews, J. L. O'Brien, M. Ams, M. J. Withford, P. Dekker","cross_cats":["physics.optics"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-02-25T12:44:56Z","title":"Laser written waveguide photonic quantum circuits"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0902.4357","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:a9ad80c64cd0388a2714cf9efd92be48abed3da56ad972fa2fccabba01b2450a","target":"record","created_at":"2026-05-18T04:20:23Z","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":"d5fbf25ebf4a458f8e19c855340bc266f1ca23f18026be966cd5d66d932d8b15","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-02-25T12:44:56Z","title_canon_sha256":"7bf453bfdf19de941d4585c10db01dc7577ac35ae633b277b1a579142abd5182"},"schema_version":"1.0","source":{"id":"0902.4357","kind":"arxiv","version":2}},"canonical_sha256":"16422b0017fb5c5456d1b595b5d4ea61ca3e4676983cb88bb796d09d95f2981a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"16422b0017fb5c5456d1b595b5d4ea61ca3e4676983cb88bb796d09d95f2981a","first_computed_at":"2026-05-18T04:20:23.518492Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:20:23.518492Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"put3i0qYjUCMz+O7hp1VZnaFVlAsai2i4XTi1HMoGvqQCE2CylpxYbipaZ7H0dN1d6QvU/lmr5r5E18IVHpoBg==","signature_status":"signed_v1","signed_at":"2026-05-18T04:20:23.519138Z","signed_message":"canonical_sha256_bytes"},"source_id":"0902.4357","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a9ad80c64cd0388a2714cf9efd92be48abed3da56ad972fa2fccabba01b2450a","sha256:839d6a886ac7131e295c74a9a0b73f75fe7c7551ed5c764fc7d60da4dd6b46e4"],"state_sha256":"1c1438a311e55a235e1c92962fd02cbe3da511df42e911f2f73e976c2d4e5c40"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FiQwYDBvv7zHBl73/kFA+nBQf4KRSzcOibssKfMSqBryFy1wVVnzTntsNIts7Lq6GkANSJkJzos1wFkrAXLJAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T15:01:24.070249Z","bundle_sha256":"af031f5a9fbc0a87bfaf17ac970a2186830a95e80b872b61b67fa3b63c68259e"}}