{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:CFCPO2POWGGGIPWUP6H2RGYFIW","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":"828614f292588bab7006e22244523bcd148879122c020ee91b91e9d0c2889386","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2014-12-13T07:10:36Z","title_canon_sha256":"8a244cbf1acb8033cf2177b21c573f332d42870e7e709bb6beccbaa9a6a97efc"},"schema_version":"1.0","source":{"id":"1412.4200","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1412.4200","created_at":"2026-05-18T02:31:19Z"},{"alias_kind":"arxiv_version","alias_value":"1412.4200v1","created_at":"2026-05-18T02:31:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1412.4200","created_at":"2026-05-18T02:31:19Z"},{"alias_kind":"pith_short_12","alias_value":"CFCPO2POWGGG","created_at":"2026-05-18T12:28:22Z"},{"alias_kind":"pith_short_16","alias_value":"CFCPO2POWGGGIPWU","created_at":"2026-05-18T12:28:22Z"},{"alias_kind":"pith_short_8","alias_value":"CFCPO2PO","created_at":"2026-05-18T12:28:22Z"}],"graph_snapshots":[{"event_id":"sha256:265f25dec93da232797b4064cc739fc02578675795833970ed97f7b9c5e6309f","target":"graph","created_at":"2026-05-18T02:31:19Z","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":"Radio-frequency reflectometry of nanodevices requires careful separation of signal quadratures to distinguish dissipative and dispersive contributions to the device impedance. A tunable phase shifter for this purpose is described and characterized. The phase shifter, consisting of a varactor-loaded transmission line, has the necessary tuning range combined with acceptable insertion loss across a frequency band 100 MHz - 1 GHz spanning most radio-frequency experiments. Its operation is demonstrated by demodulating separately the signals due to resistance and capacitance changes in a model devic","authors_text":"E. A. Laird, G. A. D. Briggs, G. Yin","cross_cats":["cond-mat.mes-hall"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2014-12-13T07:10:36Z","title":"A wide-band tunable phase shifter for radio-frequency reflectometry"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1412.4200","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":"sha256:7b3e16ec565f8f94630ae21bbc2613bbe6dead2f604a32dfdddedff3227210bb","target":"record","created_at":"2026-05-18T02:31:19Z","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":"828614f292588bab7006e22244523bcd148879122c020ee91b91e9d0c2889386","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2014-12-13T07:10:36Z","title_canon_sha256":"8a244cbf1acb8033cf2177b21c573f332d42870e7e709bb6beccbaa9a6a97efc"},"schema_version":"1.0","source":{"id":"1412.4200","kind":"arxiv","version":1}},"canonical_sha256":"1144f769eeb18c643ed47f8fa89b0545b54c3f6882bce31f26c2a27c4c55a556","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1144f769eeb18c643ed47f8fa89b0545b54c3f6882bce31f26c2a27c4c55a556","first_computed_at":"2026-05-18T02:31:19.931958Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:31:19.931958Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2oG4qFkMUrqCiXZCEkKce5X0x5fJyFsL22lqv8g8nOoDmMEZARXeGUonl2U1UUgkedDKc0so79Itn6q5ucNKDA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:31:19.932586Z","signed_message":"canonical_sha256_bytes"},"source_id":"1412.4200","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7b3e16ec565f8f94630ae21bbc2613bbe6dead2f604a32dfdddedff3227210bb","sha256:265f25dec93da232797b4064cc739fc02578675795833970ed97f7b9c5e6309f"],"state_sha256":"be6f7a5e86e783e47c5ef02e05c029b167183589734f1f727a67ae30fc472f38"}