{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:C646H64L6ETPO74NOZRC5GFFLF","short_pith_number":"pith:C646H64L","canonical_record":{"source":{"id":"1506.07921","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-06-25T23:24:32Z","cross_cats_sorted":["physics.optics","quant-ph"],"title_canon_sha256":"dba9d265ad032252bfad9daf99af8ed436f403681042ff9986000f1448e7d304","abstract_canon_sha256":"7a47ffeb4e534ccac879b246fe91195d00c746f8c106bf0e1c55f969afdd4b46"},"schema_version":"1.0"},"canonical_sha256":"17b9e3fb8bf126f77f8d76622e98a5597c63808aed541e4a5c1469486e0fe96a","source":{"kind":"arxiv","id":"1506.07921","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1506.07921","created_at":"2026-05-18T01:37:48Z"},{"alias_kind":"arxiv_version","alias_value":"1506.07921v1","created_at":"2026-05-18T01:37:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1506.07921","created_at":"2026-05-18T01:37:48Z"},{"alias_kind":"pith_short_12","alias_value":"C646H64L6ETP","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_16","alias_value":"C646H64L6ETPO74N","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_8","alias_value":"C646H64L","created_at":"2026-05-18T12:29:14Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:C646H64L6ETPO74NOZRC5GFFLF","target":"record","payload":{"canonical_record":{"source":{"id":"1506.07921","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-06-25T23:24:32Z","cross_cats_sorted":["physics.optics","quant-ph"],"title_canon_sha256":"dba9d265ad032252bfad9daf99af8ed436f403681042ff9986000f1448e7d304","abstract_canon_sha256":"7a47ffeb4e534ccac879b246fe91195d00c746f8c106bf0e1c55f969afdd4b46"},"schema_version":"1.0"},"canonical_sha256":"17b9e3fb8bf126f77f8d76622e98a5597c63808aed541e4a5c1469486e0fe96a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:37:48.599228Z","signature_b64":"fNubRl4Fc0xYAgvWceEtTjxLZE503kJnApVbGbv6a9+NxW2El1Gh5r7y9kqBdz4K61u05uMT0IaeBW8HOBlKDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"17b9e3fb8bf126f77f8d76622e98a5597c63808aed541e4a5c1469486e0fe96a","last_reissued_at":"2026-05-18T01:37:48.598638Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:37:48.598638Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1506.07921","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":"2026-05-18T01:37:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hKSaIZi/1OBz08FWy3fsgM1viGtO3JdngGEF/jCBgl6SMUqh7UcGH7qowr7tT9ZNOjZUYVrrsIsASxpzAnrxBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T07:30:34.694263Z"},"content_sha256":"8e369248a74d97c556f2fa4edcc840114ea9a6f24158d59964a705d63bdb7409","schema_version":"1.0","event_id":"sha256:8e369248a74d97c556f2fa4edcc840114ea9a6f24158d59964a705d63bdb7409"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:C646H64L6ETPO74NOZRC5GFFLF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Superconducting nanowire single-photon detectors at a wavelength of 940 nm","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.optics","quant-ph"],"primary_cat":"cond-mat.supr-con","authors_text":"H. Li, J. J. Wu, L. X. You, L. Zhang, Q. Guo, S. J. Chen, W. J. Zhang, X. M. Xie, X.Y. Liu, X. Y. Yang, Y. H. He, Z. Wang","submitted_at":"2015-06-25T23:24:32Z","abstract_excerpt":"We develop single-photon detectors comprising single-mode fiber-coupled superconducting nanowires, with high system detection efficiencies at a wavelength of 940 nm. The detector comprises a 6.5-nm-thick, 110-nm-wide NbN nanowire meander fabricated onto a Si substrate with a distributed Bragg reflector for enhancing the optical absorptance. We demonstrate that, via the design of a low filling factor (1/3) and active area ({\\Phi} = 10 {\\mu}m), the system reaches a detection efficiency of ~60% with a dark count rate of 10 Hz, a recovery time <12 ns, and a timing jitter of ~50 ps."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1506.07921","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":"2026-05-18T01:37:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/iINpfm+UOw3RDxkzeQdld6+c+W5SCs1cqjZ/0kxSsx7dDJIiCFFbGbgHO32CAT4Iq5W84iL+8HN7yHHNoSVAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T07:30:34.694675Z"},"content_sha256":"a849df93a785ec892e29fc3bd4b2386783f0ecb52f8f0585050078d30c254b61","schema_version":"1.0","event_id":"sha256:a849df93a785ec892e29fc3bd4b2386783f0ecb52f8f0585050078d30c254b61"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/C646H64L6ETPO74NOZRC5GFFLF/bundle.json","state_url":"https://pith.science/pith/C646H64L6ETPO74NOZRC5GFFLF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/C646H64L6ETPO74NOZRC5GFFLF/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":"2026-05-30T07:30:34Z","links":{"resolver":"https://pith.science/pith/C646H64L6ETPO74NOZRC5GFFLF","bundle":"https://pith.science/pith/C646H64L6ETPO74NOZRC5GFFLF/bundle.json","state":"https://pith.science/pith/C646H64L6ETPO74NOZRC5GFFLF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/C646H64L6ETPO74NOZRC5GFFLF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:C646H64L6ETPO74NOZRC5GFFLF","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":"7a47ffeb4e534ccac879b246fe91195d00c746f8c106bf0e1c55f969afdd4b46","cross_cats_sorted":["physics.optics","quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-06-25T23:24:32Z","title_canon_sha256":"dba9d265ad032252bfad9daf99af8ed436f403681042ff9986000f1448e7d304"},"schema_version":"1.0","source":{"id":"1506.07921","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1506.07921","created_at":"2026-05-18T01:37:48Z"},{"alias_kind":"arxiv_version","alias_value":"1506.07921v1","created_at":"2026-05-18T01:37:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1506.07921","created_at":"2026-05-18T01:37:48Z"},{"alias_kind":"pith_short_12","alias_value":"C646H64L6ETP","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_16","alias_value":"C646H64L6ETPO74N","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_8","alias_value":"C646H64L","created_at":"2026-05-18T12:29:14Z"}],"graph_snapshots":[{"event_id":"sha256:a849df93a785ec892e29fc3bd4b2386783f0ecb52f8f0585050078d30c254b61","target":"graph","created_at":"2026-05-18T01:37:48Z","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 develop single-photon detectors comprising single-mode fiber-coupled superconducting nanowires, with high system detection efficiencies at a wavelength of 940 nm. The detector comprises a 6.5-nm-thick, 110-nm-wide NbN nanowire meander fabricated onto a Si substrate with a distributed Bragg reflector for enhancing the optical absorptance. We demonstrate that, via the design of a low filling factor (1/3) and active area ({\\Phi} = 10 {\\mu}m), the system reaches a detection efficiency of ~60% with a dark count rate of 10 Hz, a recovery time <12 ns, and a timing jitter of ~50 ps.","authors_text":"H. Li, J. J. Wu, L. X. You, L. Zhang, Q. Guo, S. J. Chen, W. J. Zhang, X. M. Xie, X.Y. Liu, X. Y. Yang, Y. H. He, Z. Wang","cross_cats":["physics.optics","quant-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-06-25T23:24:32Z","title":"Superconducting nanowire single-photon detectors at a wavelength of 940 nm"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1506.07921","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":"sha256:8e369248a74d97c556f2fa4edcc840114ea9a6f24158d59964a705d63bdb7409","target":"record","created_at":"2026-05-18T01:37:48Z","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":"7a47ffeb4e534ccac879b246fe91195d00c746f8c106bf0e1c55f969afdd4b46","cross_cats_sorted":["physics.optics","quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-06-25T23:24:32Z","title_canon_sha256":"dba9d265ad032252bfad9daf99af8ed436f403681042ff9986000f1448e7d304"},"schema_version":"1.0","source":{"id":"1506.07921","kind":"arxiv","version":1}},"canonical_sha256":"17b9e3fb8bf126f77f8d76622e98a5597c63808aed541e4a5c1469486e0fe96a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"17b9e3fb8bf126f77f8d76622e98a5597c63808aed541e4a5c1469486e0fe96a","first_computed_at":"2026-05-18T01:37:48.598638Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:37:48.598638Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fNubRl4Fc0xYAgvWceEtTjxLZE503kJnApVbGbv6a9+NxW2El1Gh5r7y9kqBdz4K61u05uMT0IaeBW8HOBlKDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:37:48.599228Z","signed_message":"canonical_sha256_bytes"},"source_id":"1506.07921","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8e369248a74d97c556f2fa4edcc840114ea9a6f24158d59964a705d63bdb7409","sha256:a849df93a785ec892e29fc3bd4b2386783f0ecb52f8f0585050078d30c254b61"],"state_sha256":"13253a23464e7eb339570bd4831c3dd50d4f43071b116f544fcb6d6bacb1032a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YPGURVuZc4LkaVmhN/vq9Y9KfD75BynhBxYRXPuJOGYfTGTw0ORfi+MM6OdgRW+Q3InJjC/sXVSLmuxoXxSUAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T07:30:34.699494Z","bundle_sha256":"37ef41bda2828961aef0be72d605be9520d6cbe2c2ba87e7342c8b5affd7f6c2"}}