{"paper":{"title":"Noise limits for dc SQUID readout of high-$Q$ resonators below 300 MHz","license":"http://creativecommons.org/publicdomain/zero/1.0/","headline":"","cross_cats":["hep-ex"],"primary_cat":"quant-ph","authors_text":"A. Droster, A. Keller, A. Kunder, A. K. Yi, B. A. Young, C. Bartram, C. Bell, C. D. Tesche, C. P. Salemi, D. Li, D. Schmidt, D. Wright, E. C. van Assendelft, G. Hilton, H.-M. Cho, J. Begin, J. Corbin, J. Echevers, John Clarke, J. Singh, J. T. Fry, J. Ullom, J. Wiedemann, K. D. Irwin, K. M. W. Pappas, K. van Bibber, K. Wells, L. Brouwer, L. Vale, L. Winslow, M. Durkin, M. Simanovskaia, M. Vissers, N. M. Rapidis, N. Otto, P. Stark, R. Kolevatov, S. Chaudhuri, S. Cuadra, V. Ankel, W. Craddock","submitted_at":"2025-04-29T03:42:06Z","abstract_excerpt":"We present the limits on noise for the readout of cryogenic high-$Q$ resonators using dc Superconducting Quantum Interference Devices (SQUIDs) below 300 MHz. This analysis uses realized first-stage SQUIDs (previously published), whose performance is well described by Tesche-Clarke (TC) theory, coupled directly to the resonators. We also present data from a prototype second-stage dc SQUID array designed to couple to this first-stage SQUID as a follow-on amplifier with high system bandwidth. This analysis is the first full consideration of dc SQUID noise performance referred to a high-$Q$ resona"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2504.20398","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/2504.20398/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"}