{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:HFHDZRASJC7WPTPT6DYR2BHNU2","short_pith_number":"pith:HFHDZRAS","canonical_record":{"source":{"id":"2401.17454","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2024-01-30T21:32:57Z","cross_cats_sorted":[],"title_canon_sha256":"e21bf19573db67dae7323d5125becb843fb5b7dc2d36fcaee4880aa36df254b1","abstract_canon_sha256":"5b1f403bc2bc8bc61c88f02a47e9142ff2e1b845afe5ec95f466649742874fe4"},"schema_version":"1.0"},"canonical_sha256":"394e3cc41248bf67cdf3f0f11d04eda6907041d8a86132e09df7d4443107da89","source":{"kind":"arxiv","id":"2401.17454","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2401.17454","created_at":"2026-07-05T07:39:37Z"},{"alias_kind":"arxiv_version","alias_value":"2401.17454v1","created_at":"2026-07-05T07:39:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2401.17454","created_at":"2026-07-05T07:39:37Z"},{"alias_kind":"pith_short_12","alias_value":"HFHDZRASJC7W","created_at":"2026-07-05T07:39:37Z"},{"alias_kind":"pith_short_16","alias_value":"HFHDZRASJC7WPTPT","created_at":"2026-07-05T07:39:37Z"},{"alias_kind":"pith_short_8","alias_value":"HFHDZRAS","created_at":"2026-07-05T07:39:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:HFHDZRASJC7WPTPT6DYR2BHNU2","target":"record","payload":{"canonical_record":{"source":{"id":"2401.17454","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2024-01-30T21:32:57Z","cross_cats_sorted":[],"title_canon_sha256":"e21bf19573db67dae7323d5125becb843fb5b7dc2d36fcaee4880aa36df254b1","abstract_canon_sha256":"5b1f403bc2bc8bc61c88f02a47e9142ff2e1b845afe5ec95f466649742874fe4"},"schema_version":"1.0"},"canonical_sha256":"394e3cc41248bf67cdf3f0f11d04eda6907041d8a86132e09df7d4443107da89","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T07:39:37.034938Z","signature_b64":"aH8+6TNHdFxtFB6AtDGYvxOlNWEpR8l+vOTmlwDZmB59yh/Ckm6JMQijY+wgBLN2l5kcd/3HWy43ugzFCh6fAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"394e3cc41248bf67cdf3f0f11d04eda6907041d8a86132e09df7d4443107da89","last_reissued_at":"2026-07-05T07:39:37.034474Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T07:39:37.034474Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2401.17454","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":"2026-07-05T07:39:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"k0XRQIiiUM+Ji5kziG8cYFdBgVN04p9rYFjKZDXFkKKy+lhuKrePatSE2C/zyKCXV5J9kgK1wKLVCAMvoFmKDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T22:12:01.201143Z"},"content_sha256":"8ac340971cab82d2e28b5ee09645229af6c60a743bdd39ff3d97444fff3bd85c","schema_version":"1.0","event_id":"sha256:8ac340971cab82d2e28b5ee09645229af6c60a743bdd39ff3d97444fff3bd85c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:HFHDZRASJC7WPTPT6DYR2BHNU2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Frequency-domain multiplexing of SNSPDs with tunable superconducting resonators","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.ins-det","authors_text":"Alexander B. Walter, Boris Korzh, Emanuel Knehr, Henry G. Leduc, Lautaro Narv\\'aez, Lorenzo Minutolo, Matthew D. Shaw, Peter K. Day, Ralph Chamberlin, Sahil Patel, Sasha Sypkens, Tracee Jamison-Hooks","submitted_at":"2024-01-30T21:32:57Z","abstract_excerpt":"This work culminates in a demonstration of an alternative Frequency Domain Multiplexing (FDM) scheme for Superconducting Nanowire Single-Photon Detectors (SNSPDs) using the Kinetic inductance Parametric UP-converter (KPUP) made out of NbTiN. There are multiple multiplexing architectures for SNSPDs that are already in use, but FDM could prove superior in applications where the operational bias currents are very low, especially for mid- and far-infrared SNSPDs. Previous FDM schemes integrated the SNSPD within the resonator, while in this work we use an external resonator, which gives more flexib"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2401.17454","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2401.17454/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T07:39:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TgOFlbAK5vCWUYhg+9o6EQ/WRX353QlNilR64GOl7xqHeQ2QGVTJw3hJEQOdmcgSv7RtT6Vz++4CXfoVuKdDBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T22:12:01.202103Z"},"content_sha256":"22de7410b8cec782c6e57ddea6dc0828ef0eecf0ecaa114f4a47a0eaa3a404d0","schema_version":"1.0","event_id":"sha256:22de7410b8cec782c6e57ddea6dc0828ef0eecf0ecaa114f4a47a0eaa3a404d0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HFHDZRASJC7WPTPT6DYR2BHNU2/bundle.json","state_url":"https://pith.science/pith/HFHDZRASJC7WPTPT6DYR2BHNU2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HFHDZRASJC7WPTPT6DYR2BHNU2/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":"2026-08-03T22:12:01Z","links":{"resolver":"https://pith.science/pith/HFHDZRASJC7WPTPT6DYR2BHNU2","bundle":"https://pith.science/pith/HFHDZRASJC7WPTPT6DYR2BHNU2/bundle.json","state":"https://pith.science/pith/HFHDZRASJC7WPTPT6DYR2BHNU2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HFHDZRASJC7WPTPT6DYR2BHNU2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:HFHDZRASJC7WPTPT6DYR2BHNU2","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":"5b1f403bc2bc8bc61c88f02a47e9142ff2e1b845afe5ec95f466649742874fe4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2024-01-30T21:32:57Z","title_canon_sha256":"e21bf19573db67dae7323d5125becb843fb5b7dc2d36fcaee4880aa36df254b1"},"schema_version":"1.0","source":{"id":"2401.17454","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2401.17454","created_at":"2026-07-05T07:39:37Z"},{"alias_kind":"arxiv_version","alias_value":"2401.17454v1","created_at":"2026-07-05T07:39:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2401.17454","created_at":"2026-07-05T07:39:37Z"},{"alias_kind":"pith_short_12","alias_value":"HFHDZRASJC7W","created_at":"2026-07-05T07:39:37Z"},{"alias_kind":"pith_short_16","alias_value":"HFHDZRASJC7WPTPT","created_at":"2026-07-05T07:39:37Z"},{"alias_kind":"pith_short_8","alias_value":"HFHDZRAS","created_at":"2026-07-05T07:39:37Z"}],"graph_snapshots":[{"event_id":"sha256:22de7410b8cec782c6e57ddea6dc0828ef0eecf0ecaa114f4a47a0eaa3a404d0","target":"graph","created_at":"2026-07-05T07:39:37Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2401.17454/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"This work culminates in a demonstration of an alternative Frequency Domain Multiplexing (FDM) scheme for Superconducting Nanowire Single-Photon Detectors (SNSPDs) using the Kinetic inductance Parametric UP-converter (KPUP) made out of NbTiN. There are multiple multiplexing architectures for SNSPDs that are already in use, but FDM could prove superior in applications where the operational bias currents are very low, especially for mid- and far-infrared SNSPDs. Previous FDM schemes integrated the SNSPD within the resonator, while in this work we use an external resonator, which gives more flexib","authors_text":"Alexander B. Walter, Boris Korzh, Emanuel Knehr, Henry G. Leduc, Lautaro Narv\\'aez, Lorenzo Minutolo, Matthew D. Shaw, Peter K. Day, Ralph Chamberlin, Sahil Patel, Sasha Sypkens, Tracee Jamison-Hooks","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2024-01-30T21:32:57Z","title":"Frequency-domain multiplexing of SNSPDs with tunable superconducting resonators"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2401.17454","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":"sha256:8ac340971cab82d2e28b5ee09645229af6c60a743bdd39ff3d97444fff3bd85c","target":"record","created_at":"2026-07-05T07:39:37Z","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":"5b1f403bc2bc8bc61c88f02a47e9142ff2e1b845afe5ec95f466649742874fe4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2024-01-30T21:32:57Z","title_canon_sha256":"e21bf19573db67dae7323d5125becb843fb5b7dc2d36fcaee4880aa36df254b1"},"schema_version":"1.0","source":{"id":"2401.17454","kind":"arxiv","version":1}},"canonical_sha256":"394e3cc41248bf67cdf3f0f11d04eda6907041d8a86132e09df7d4443107da89","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"394e3cc41248bf67cdf3f0f11d04eda6907041d8a86132e09df7d4443107da89","first_computed_at":"2026-07-05T07:39:37.034474Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T07:39:37.034474Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"aH8+6TNHdFxtFB6AtDGYvxOlNWEpR8l+vOTmlwDZmB59yh/Ckm6JMQijY+wgBLN2l5kcd/3HWy43ugzFCh6fAg==","signature_status":"signed_v1","signed_at":"2026-07-05T07:39:37.034938Z","signed_message":"canonical_sha256_bytes"},"source_id":"2401.17454","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8ac340971cab82d2e28b5ee09645229af6c60a743bdd39ff3d97444fff3bd85c","sha256:22de7410b8cec782c6e57ddea6dc0828ef0eecf0ecaa114f4a47a0eaa3a404d0"],"state_sha256":"0ad37c5eba4fb1578f4eb90a13a98e49fcfa2e02adb1f63383f67b4cc8321132"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WvVcMvqxEPsKpy2nA7yKbUM+z8aFRKoi7UrNbN47u/h24MaPCFiLfigF2WcHmBtW0AzUT0tz4CzwpsrEJyljCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-03T22:12:01.237073Z","bundle_sha256":"cacd24ba98687e93ef39a2e3c1fac7639424c79ea07a581070e7d9d89a3a620e"}}