{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:FVWIHR6FSQU7XKXYCQCNRIY3ND","short_pith_number":"pith:FVWIHR6F","canonical_record":{"source":{"id":"1801.07915","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-01-24T10:45:05Z","cross_cats_sorted":[],"title_canon_sha256":"04c3ba32ec87546c583e6c7ab87d14de5cca8a7c689ecd475267e859d0f43736","abstract_canon_sha256":"2e03815c2c7d4d924dc74900e2893f9ae6643f60907825a424014a544a720cad"},"schema_version":"1.0"},"canonical_sha256":"2d6c83c7c59429fbaaf81404d8a31b68ecde593a183c35ae60a69b14c90d413d","source":{"kind":"arxiv","id":"1801.07915","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.07915","created_at":"2026-05-17T23:43:18Z"},{"alias_kind":"arxiv_version","alias_value":"1801.07915v1","created_at":"2026-05-17T23:43:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.07915","created_at":"2026-05-17T23:43:18Z"},{"alias_kind":"pith_short_12","alias_value":"FVWIHR6FSQU7","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_16","alias_value":"FVWIHR6FSQU7XKXY","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_8","alias_value":"FVWIHR6F","created_at":"2026-05-18T12:32:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:FVWIHR6FSQU7XKXYCQCNRIY3ND","target":"record","payload":{"canonical_record":{"source":{"id":"1801.07915","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-01-24T10:45:05Z","cross_cats_sorted":[],"title_canon_sha256":"04c3ba32ec87546c583e6c7ab87d14de5cca8a7c689ecd475267e859d0f43736","abstract_canon_sha256":"2e03815c2c7d4d924dc74900e2893f9ae6643f60907825a424014a544a720cad"},"schema_version":"1.0"},"canonical_sha256":"2d6c83c7c59429fbaaf81404d8a31b68ecde593a183c35ae60a69b14c90d413d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:43:18.245013Z","signature_b64":"8T+ErBMLnGXz1MWltGZwvTQQFZEOkyFdfTct5SsamzftRqzUp2NoP4sWA02UKV3EeMJCjiV/7qlb5JSvoVkLCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2d6c83c7c59429fbaaf81404d8a31b68ecde593a183c35ae60a69b14c90d413d","last_reissued_at":"2026-05-17T23:43:18.244325Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:43:18.244325Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1801.07915","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":"2026-05-17T23:43:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"okeF8l8+E+epoHTziD0BxGM6k3SNML8iy8JXWQnSgFfeDuHTHwhEELbqnsLVddS4NUol9asNdWndjrbiIi/nDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T18:38:26.238480Z"},"content_sha256":"c8ed4e96a4e8a6a9ed6267c74dfccbeea542b49d52b16ec9c1996773c68eb4d1","schema_version":"1.0","event_id":"sha256:c8ed4e96a4e8a6a9ed6267c74dfccbeea542b49d52b16ec9c1996773c68eb4d1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:FVWIHR6FSQU7XKXYCQCNRIY3ND","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Transfer-printed single photon sources coupled to wire waveguides","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.app-ph","authors_text":"Masahiro Kakuda, Ryota Katsumi, Satoshi Iwamoto, Yasuhiko Arakawa, Yasutomo Ota","submitted_at":"2018-01-24T10:45:05Z","abstract_excerpt":"Photonic integrated circuits (PICs) are attractive platforms to perform large-scale quantum information processing. While highly-functional PICs (e.g. silicon based photonic-circuits) and high-performance single photon sources (SPSs, e.g. compound-semiconductor quantum dots (QDs)) have been independently demonstrated, their combination for single-photon-based applications has still been limited. This is largely due to the complexities of introducing SPSs into existing PIC platforms, which are generally realized with different materials and using distinct fabrication protocols. Here, we report "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.07915","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":""},"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":"2026-05-17T23:43:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HjWBThnbD4obl8ho8z5pP5VvqWRYGKGKDwEGolvyoMCBLQdAHhom5NAei6mPyBMZM6WQcfI8YV0zW3gIQm2UAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T18:38:26.239159Z"},"content_sha256":"b9196fe026089d784b339f74eb27acd71fc5325bc66c0dccf8e017c753fe265a","schema_version":"1.0","event_id":"sha256:b9196fe026089d784b339f74eb27acd71fc5325bc66c0dccf8e017c753fe265a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FVWIHR6FSQU7XKXYCQCNRIY3ND/bundle.json","state_url":"https://pith.science/pith/FVWIHR6FSQU7XKXYCQCNRIY3ND/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FVWIHR6FSQU7XKXYCQCNRIY3ND/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":"2026-06-06T18:38:26Z","links":{"resolver":"https://pith.science/pith/FVWIHR6FSQU7XKXYCQCNRIY3ND","bundle":"https://pith.science/pith/FVWIHR6FSQU7XKXYCQCNRIY3ND/bundle.json","state":"https://pith.science/pith/FVWIHR6FSQU7XKXYCQCNRIY3ND/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FVWIHR6FSQU7XKXYCQCNRIY3ND/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:FVWIHR6FSQU7XKXYCQCNRIY3ND","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":"2e03815c2c7d4d924dc74900e2893f9ae6643f60907825a424014a544a720cad","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-01-24T10:45:05Z","title_canon_sha256":"04c3ba32ec87546c583e6c7ab87d14de5cca8a7c689ecd475267e859d0f43736"},"schema_version":"1.0","source":{"id":"1801.07915","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.07915","created_at":"2026-05-17T23:43:18Z"},{"alias_kind":"arxiv_version","alias_value":"1801.07915v1","created_at":"2026-05-17T23:43:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.07915","created_at":"2026-05-17T23:43:18Z"},{"alias_kind":"pith_short_12","alias_value":"FVWIHR6FSQU7","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_16","alias_value":"FVWIHR6FSQU7XKXY","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_8","alias_value":"FVWIHR6F","created_at":"2026-05-18T12:32:25Z"}],"graph_snapshots":[{"event_id":"sha256:b9196fe026089d784b339f74eb27acd71fc5325bc66c0dccf8e017c753fe265a","target":"graph","created_at":"2026-05-17T23:43:18Z","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":"Photonic integrated circuits (PICs) are attractive platforms to perform large-scale quantum information processing. While highly-functional PICs (e.g. silicon based photonic-circuits) and high-performance single photon sources (SPSs, e.g. compound-semiconductor quantum dots (QDs)) have been independently demonstrated, their combination for single-photon-based applications has still been limited. This is largely due to the complexities of introducing SPSs into existing PIC platforms, which are generally realized with different materials and using distinct fabrication protocols. Here, we report ","authors_text":"Masahiro Kakuda, Ryota Katsumi, Satoshi Iwamoto, Yasuhiko Arakawa, Yasutomo Ota","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-01-24T10:45:05Z","title":"Transfer-printed single photon sources coupled to wire waveguides"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.07915","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:c8ed4e96a4e8a6a9ed6267c74dfccbeea542b49d52b16ec9c1996773c68eb4d1","target":"record","created_at":"2026-05-17T23:43:18Z","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":"2e03815c2c7d4d924dc74900e2893f9ae6643f60907825a424014a544a720cad","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-01-24T10:45:05Z","title_canon_sha256":"04c3ba32ec87546c583e6c7ab87d14de5cca8a7c689ecd475267e859d0f43736"},"schema_version":"1.0","source":{"id":"1801.07915","kind":"arxiv","version":1}},"canonical_sha256":"2d6c83c7c59429fbaaf81404d8a31b68ecde593a183c35ae60a69b14c90d413d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2d6c83c7c59429fbaaf81404d8a31b68ecde593a183c35ae60a69b14c90d413d","first_computed_at":"2026-05-17T23:43:18.244325Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:43:18.244325Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"8T+ErBMLnGXz1MWltGZwvTQQFZEOkyFdfTct5SsamzftRqzUp2NoP4sWA02UKV3EeMJCjiV/7qlb5JSvoVkLCg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:43:18.245013Z","signed_message":"canonical_sha256_bytes"},"source_id":"1801.07915","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c8ed4e96a4e8a6a9ed6267c74dfccbeea542b49d52b16ec9c1996773c68eb4d1","sha256:b9196fe026089d784b339f74eb27acd71fc5325bc66c0dccf8e017c753fe265a"],"state_sha256":"c58039f290b43de463a4d82901671faa543ff1a7a80bccd61c5f829f744e5ddb"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aCPg/NpwREgveMCTyKl0Gs7BIuo+OH6R7NK8vl6TvyYVnN2buKzI00iOeTMU9G0hvRfnYkSeU31fcg8RmpAXBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T18:38:26.242476Z","bundle_sha256":"205fe0db0962cc78e1d3becaa4c241a610a9af684cced62e21db4c75c35703b2"}}