{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:CKYVDTOD4OXVS6XAAJWN3CUAWY","short_pith_number":"pith:CKYVDTOD","canonical_record":{"source":{"id":"1110.3936","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-10-18T11:11:27Z","cross_cats_sorted":[],"title_canon_sha256":"2b1fccd08a452cb67191ff938e37b806281aa433019fe8a0368da2264731f169","abstract_canon_sha256":"3698ea7112f36af2c5b83652819cb00ad8ac5f6ac9a3d76f564495e11f6f62b5"},"schema_version":"1.0"},"canonical_sha256":"12b151cdc3e3af597ae0026cdd8a80b605bc6070a1ede315073d068a1d37e193","source":{"kind":"arxiv","id":"1110.3936","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1110.3936","created_at":"2026-05-18T02:00:09Z"},{"alias_kind":"arxiv_version","alias_value":"1110.3936v1","created_at":"2026-05-18T02:00:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1110.3936","created_at":"2026-05-18T02:00:09Z"},{"alias_kind":"pith_short_12","alias_value":"CKYVDTOD4OXV","created_at":"2026-05-18T12:26:26Z"},{"alias_kind":"pith_short_16","alias_value":"CKYVDTOD4OXVS6XA","created_at":"2026-05-18T12:26:26Z"},{"alias_kind":"pith_short_8","alias_value":"CKYVDTOD","created_at":"2026-05-18T12:26:26Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:CKYVDTOD4OXVS6XAAJWN3CUAWY","target":"record","payload":{"canonical_record":{"source":{"id":"1110.3936","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-10-18T11:11:27Z","cross_cats_sorted":[],"title_canon_sha256":"2b1fccd08a452cb67191ff938e37b806281aa433019fe8a0368da2264731f169","abstract_canon_sha256":"3698ea7112f36af2c5b83652819cb00ad8ac5f6ac9a3d76f564495e11f6f62b5"},"schema_version":"1.0"},"canonical_sha256":"12b151cdc3e3af597ae0026cdd8a80b605bc6070a1ede315073d068a1d37e193","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:00:09.436037Z","signature_b64":"lL33imjX5XBIGCIMumjT/RAA+mesNl9z18SBcOGsH2pCPN3m+/CooPnnmL17psjosIYjupFtxus08YD/aBGbBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"12b151cdc3e3af597ae0026cdd8a80b605bc6070a1ede315073d068a1d37e193","last_reissued_at":"2026-05-18T02:00:09.435279Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:00:09.435279Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1110.3936","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":"2026-05-18T02:00:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yjTpsB70RkMxJlMxRs/YsooDcb/Idk2Weap0NH4mE7fUuRAs/cWYN0kGCy3KsKkuEVnG9mgGWbIZOPKCzSS2CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T04:20:48.918422Z"},"content_sha256":"c9807ffbec5ff1681c35c8a1e9c4efcee0aac29aa42d37dad8c10f532ec317bd","schema_version":"1.0","event_id":"sha256:c9807ffbec5ff1681c35c8a1e9c4efcee0aac29aa42d37dad8c10f532ec317bd"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:CKYVDTOD4OXVS6XAAJWN3CUAWY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Efficient generation of single and entangled photons on a silicon photonic integrated chip","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Dirk Englund, Jacob Mower","submitted_at":"2011-10-18T11:11:27Z","abstract_excerpt":"We present a protocol for generating on-demand, indistinguishable single photons on a silicon photonic integrated chip. The source is a time-multiplexed spontaneous parametric down-conversion element that allows optimization of single-photon versus multiphoton emission while realizing high output rate and indistinguishability. We minimize both the scaling of active elements and the scaling of active element loss with multiplexing. We then discuss detection strategies and data processing to further optimize the procedure. We simulate an improvement in single-photon-generation efficiency over pr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1110.3936","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":"2026-05-18T02:00:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ddHERBVk3hEAuzc/vmQSjBrg2c74T7Nmfe6WXxYOaCjB+whQcHyPzKPQyWnUADNy3U8FaMOTQCEgUNGUCJ5FCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T04:20:48.918969Z"},"content_sha256":"6576115996dd340008c6e69c339a233d72ebf5a319f8a9982b1ef780a327676c","schema_version":"1.0","event_id":"sha256:6576115996dd340008c6e69c339a233d72ebf5a319f8a9982b1ef780a327676c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CKYVDTOD4OXVS6XAAJWN3CUAWY/bundle.json","state_url":"https://pith.science/pith/CKYVDTOD4OXVS6XAAJWN3CUAWY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CKYVDTOD4OXVS6XAAJWN3CUAWY/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":"2026-06-07T04:20:48Z","links":{"resolver":"https://pith.science/pith/CKYVDTOD4OXVS6XAAJWN3CUAWY","bundle":"https://pith.science/pith/CKYVDTOD4OXVS6XAAJWN3CUAWY/bundle.json","state":"https://pith.science/pith/CKYVDTOD4OXVS6XAAJWN3CUAWY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CKYVDTOD4OXVS6XAAJWN3CUAWY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:CKYVDTOD4OXVS6XAAJWN3CUAWY","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":"3698ea7112f36af2c5b83652819cb00ad8ac5f6ac9a3d76f564495e11f6f62b5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-10-18T11:11:27Z","title_canon_sha256":"2b1fccd08a452cb67191ff938e37b806281aa433019fe8a0368da2264731f169"},"schema_version":"1.0","source":{"id":"1110.3936","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1110.3936","created_at":"2026-05-18T02:00:09Z"},{"alias_kind":"arxiv_version","alias_value":"1110.3936v1","created_at":"2026-05-18T02:00:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1110.3936","created_at":"2026-05-18T02:00:09Z"},{"alias_kind":"pith_short_12","alias_value":"CKYVDTOD4OXV","created_at":"2026-05-18T12:26:26Z"},{"alias_kind":"pith_short_16","alias_value":"CKYVDTOD4OXVS6XA","created_at":"2026-05-18T12:26:26Z"},{"alias_kind":"pith_short_8","alias_value":"CKYVDTOD","created_at":"2026-05-18T12:26:26Z"}],"graph_snapshots":[{"event_id":"sha256:6576115996dd340008c6e69c339a233d72ebf5a319f8a9982b1ef780a327676c","target":"graph","created_at":"2026-05-18T02:00:09Z","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 present a protocol for generating on-demand, indistinguishable single photons on a silicon photonic integrated chip. The source is a time-multiplexed spontaneous parametric down-conversion element that allows optimization of single-photon versus multiphoton emission while realizing high output rate and indistinguishability. We minimize both the scaling of active elements and the scaling of active element loss with multiplexing. We then discuss detection strategies and data processing to further optimize the procedure. We simulate an improvement in single-photon-generation efficiency over pr","authors_text":"Dirk Englund, Jacob Mower","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-10-18T11:11:27Z","title":"Efficient generation of single and entangled photons on a silicon photonic integrated chip"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1110.3936","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:c9807ffbec5ff1681c35c8a1e9c4efcee0aac29aa42d37dad8c10f532ec317bd","target":"record","created_at":"2026-05-18T02:00:09Z","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":"3698ea7112f36af2c5b83652819cb00ad8ac5f6ac9a3d76f564495e11f6f62b5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-10-18T11:11:27Z","title_canon_sha256":"2b1fccd08a452cb67191ff938e37b806281aa433019fe8a0368da2264731f169"},"schema_version":"1.0","source":{"id":"1110.3936","kind":"arxiv","version":1}},"canonical_sha256":"12b151cdc3e3af597ae0026cdd8a80b605bc6070a1ede315073d068a1d37e193","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"12b151cdc3e3af597ae0026cdd8a80b605bc6070a1ede315073d068a1d37e193","first_computed_at":"2026-05-18T02:00:09.435279Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:00:09.435279Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"lL33imjX5XBIGCIMumjT/RAA+mesNl9z18SBcOGsH2pCPN3m+/CooPnnmL17psjosIYjupFtxus08YD/aBGbBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:00:09.436037Z","signed_message":"canonical_sha256_bytes"},"source_id":"1110.3936","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c9807ffbec5ff1681c35c8a1e9c4efcee0aac29aa42d37dad8c10f532ec317bd","sha256:6576115996dd340008c6e69c339a233d72ebf5a319f8a9982b1ef780a327676c"],"state_sha256":"a4586518b3d9b7761f54abe97832e613c49535571bab790603eb511c46620801"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pnHJm7B3RSWRDKmVemDmMSsRPtdOElS9MW8vNvvubnOx7sXHTfCgT9WzEWnPtwpd11DJ38uX+0gJ5THK707lDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-07T04:20:48.922147Z","bundle_sha256":"746ec57f048032d1a79e141fced32fbb2bb14c1ec5f7d7e57198a986001a13e2"}}