{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:7QU47U5EJAGQUIKX27GDGBXNZB","short_pith_number":"pith:7QU47U5E","canonical_record":{"source":{"id":"1811.06557","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-11-15T19:01:03Z","cross_cats_sorted":[],"title_canon_sha256":"4f2e85816b0ba50ebb55a9025727e1599def5fc4dd1c8e64bcdd748951f5d27b","abstract_canon_sha256":"36d55f6c062ce8a914478eeaa81a84e3b8d2f798947ae5e80032c88f09159324"},"schema_version":"1.0"},"canonical_sha256":"fc29cfd3a4480d0a2157d7cc3306edc84f8fef872d8bee09f9af525dd5e02eab","source":{"kind":"arxiv","id":"1811.06557","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1811.06557","created_at":"2026-05-17T23:47:59Z"},{"alias_kind":"arxiv_version","alias_value":"1811.06557v1","created_at":"2026-05-17T23:47:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.06557","created_at":"2026-05-17T23:47:59Z"},{"alias_kind":"pith_short_12","alias_value":"7QU47U5EJAGQ","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_16","alias_value":"7QU47U5EJAGQUIKX","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_8","alias_value":"7QU47U5E","created_at":"2026-05-18T12:32:11Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:7QU47U5EJAGQUIKX27GDGBXNZB","target":"record","payload":{"canonical_record":{"source":{"id":"1811.06557","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-11-15T19:01:03Z","cross_cats_sorted":[],"title_canon_sha256":"4f2e85816b0ba50ebb55a9025727e1599def5fc4dd1c8e64bcdd748951f5d27b","abstract_canon_sha256":"36d55f6c062ce8a914478eeaa81a84e3b8d2f798947ae5e80032c88f09159324"},"schema_version":"1.0"},"canonical_sha256":"fc29cfd3a4480d0a2157d7cc3306edc84f8fef872d8bee09f9af525dd5e02eab","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:47:59.115422Z","signature_b64":"53wB4gjDQAp7oUVDDMtl5PykqDzbd6iagXM2AnS8C1n/eSfhwLUbCQ7CJNfdjoic6+tY7HAQCwX6oDmZYQ4UDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fc29cfd3a4480d0a2157d7cc3306edc84f8fef872d8bee09f9af525dd5e02eab","last_reissued_at":"2026-05-17T23:47:59.114946Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:47:59.114946Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1811.06557","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":"2026-05-17T23:47:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3RsfUcR3AOKSlkjiJcv3IRKPRuZaXvYuxyFszmEN/GDTq80NyaN03HRuBDoKi4tLjRNAQ9JAS2ZMo6fIAPI+BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T02:02:37.145123Z"},"content_sha256":"8baf5a7e1a21ccb03a5613d4271aedfcb51d26282874e32d48905eb79136455d","schema_version":"1.0","event_id":"sha256:8baf5a7e1a21ccb03a5613d4271aedfcb51d26282874e32d48905eb79136455d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:7QU47U5EJAGQUIKX27GDGBXNZB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Scalable feedback control of single photon sources for photonic quantum technologies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Dirk Englund, Jacques Carolan, Michael Hochberg, Mihir Pant, Nicholas C. Harris, Tom Baehr-Jones, Uttara Chakraborty","submitted_at":"2018-11-15T19:01:03Z","abstract_excerpt":"Large-scale quantum technologies require exquisite control over many individual quantum systems. Typically, such systems are very sensitive to environmental fluctuations, and diagnosing errors via measurements causes unavoidable perturbations. In this work we present an in situ frequency locking technique that monitors and corrects frequency variations in single photon sources based on microring resonators. By using the same classical laser fields required for photon generation as a probe to diagnose variations in the resonator frequency, our protocol applies feedback control to correct photon"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.06557","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":"2026-05-17T23:47:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wb4QMAEFKP6rwkHqIW/M4sWAyG2A74j3FSYNqkrvfXuVPW936y31ZfadUIa0CjrSDoMXT8Lfpf2D3s2FeK8TBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T02:02:37.145738Z"},"content_sha256":"1ea9ef36726499a3f4637d969fba177dc693b111684cf0005027c74814639194","schema_version":"1.0","event_id":"sha256:1ea9ef36726499a3f4637d969fba177dc693b111684cf0005027c74814639194"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7QU47U5EJAGQUIKX27GDGBXNZB/bundle.json","state_url":"https://pith.science/pith/7QU47U5EJAGQUIKX27GDGBXNZB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7QU47U5EJAGQUIKX27GDGBXNZB/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":"2026-06-08T02:02:37Z","links":{"resolver":"https://pith.science/pith/7QU47U5EJAGQUIKX27GDGBXNZB","bundle":"https://pith.science/pith/7QU47U5EJAGQUIKX27GDGBXNZB/bundle.json","state":"https://pith.science/pith/7QU47U5EJAGQUIKX27GDGBXNZB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7QU47U5EJAGQUIKX27GDGBXNZB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:7QU47U5EJAGQUIKX27GDGBXNZB","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":"36d55f6c062ce8a914478eeaa81a84e3b8d2f798947ae5e80032c88f09159324","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-11-15T19:01:03Z","title_canon_sha256":"4f2e85816b0ba50ebb55a9025727e1599def5fc4dd1c8e64bcdd748951f5d27b"},"schema_version":"1.0","source":{"id":"1811.06557","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1811.06557","created_at":"2026-05-17T23:47:59Z"},{"alias_kind":"arxiv_version","alias_value":"1811.06557v1","created_at":"2026-05-17T23:47:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.06557","created_at":"2026-05-17T23:47:59Z"},{"alias_kind":"pith_short_12","alias_value":"7QU47U5EJAGQ","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_16","alias_value":"7QU47U5EJAGQUIKX","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_8","alias_value":"7QU47U5E","created_at":"2026-05-18T12:32:11Z"}],"graph_snapshots":[{"event_id":"sha256:1ea9ef36726499a3f4637d969fba177dc693b111684cf0005027c74814639194","target":"graph","created_at":"2026-05-17T23:47:59Z","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":"Large-scale quantum technologies require exquisite control over many individual quantum systems. Typically, such systems are very sensitive to environmental fluctuations, and diagnosing errors via measurements causes unavoidable perturbations. In this work we present an in situ frequency locking technique that monitors and corrects frequency variations in single photon sources based on microring resonators. By using the same classical laser fields required for photon generation as a probe to diagnose variations in the resonator frequency, our protocol applies feedback control to correct photon","authors_text":"Dirk Englund, Jacques Carolan, Michael Hochberg, Mihir Pant, Nicholas C. Harris, Tom Baehr-Jones, Uttara Chakraborty","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-11-15T19:01:03Z","title":"Scalable feedback control of single photon sources for photonic quantum technologies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.06557","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":"sha256:8baf5a7e1a21ccb03a5613d4271aedfcb51d26282874e32d48905eb79136455d","target":"record","created_at":"2026-05-17T23:47:59Z","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":"36d55f6c062ce8a914478eeaa81a84e3b8d2f798947ae5e80032c88f09159324","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-11-15T19:01:03Z","title_canon_sha256":"4f2e85816b0ba50ebb55a9025727e1599def5fc4dd1c8e64bcdd748951f5d27b"},"schema_version":"1.0","source":{"id":"1811.06557","kind":"arxiv","version":1}},"canonical_sha256":"fc29cfd3a4480d0a2157d7cc3306edc84f8fef872d8bee09f9af525dd5e02eab","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fc29cfd3a4480d0a2157d7cc3306edc84f8fef872d8bee09f9af525dd5e02eab","first_computed_at":"2026-05-17T23:47:59.114946Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:47:59.114946Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"53wB4gjDQAp7oUVDDMtl5PykqDzbd6iagXM2AnS8C1n/eSfhwLUbCQ7CJNfdjoic6+tY7HAQCwX6oDmZYQ4UDQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:47:59.115422Z","signed_message":"canonical_sha256_bytes"},"source_id":"1811.06557","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8baf5a7e1a21ccb03a5613d4271aedfcb51d26282874e32d48905eb79136455d","sha256:1ea9ef36726499a3f4637d969fba177dc693b111684cf0005027c74814639194"],"state_sha256":"90212b2e12b2c80269c2990e065607b82d136eff4fe2fd00047774d69bb14ae8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/EvWu5keEU+PznEh3KUoW3WdTE3GAYRmvl7kfCtvCAZ88xL1abe8Ao/XiSNltsR2EgKIoPfbOWXlFeo2xH3GDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-08T02:02:37.149191Z","bundle_sha256":"7510a772ab60bcf715369a399f9e9cd543c643f1dfbe9f15f438cf7bdb79aa29"}}