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Efficient and robust analysis of complex scattering data under noise in microwave resonators

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arxiv 1410.3365 v2 pith:3CZXCQOH submitted 2014-10-13 cond-mat.supr-con physics.ins-det

Efficient and robust analysis of complex scattering data under noise in microwave resonators

classification cond-mat.supr-con physics.ins-det
keywords noiseanalysiscirclecomplexdatamicrowavereliableresonators
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Superconducting microwave resonators are reliable circuits widely used for detection and as test devices for material research. A reliable determination of their external and internal quality factors is crucial for many modern applications, which either require fast measurements or operate in the single photon regime with small signal to noise ratios. Here, we use the circle fit technique with diameter correction and provide a step by step guide for implementing an algorithm for robust fitting and calibration of complex resonator scattering data in the presence of noise. The speedup and robustness of the analysis are achieved by employing an algebraic rather than an iterative fit technique for the resonance circle.

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